Resistors
Tubular Vitreous Enamelled
Wirewound
Resistors
Tubular
Vitreous
Enamelled
Wirewound
Resistors
1600/1900 Series
Welwyn Components
• Impervious
lead free vitreous enamel coating
1600/1900
Series
• Can be supplied with fixed, adjustable,
tapped
Impervious
vitreous enamel
coating
or lead
low free
inductance
winding
Can be supplied with fixed, adjustable, tapped or
• Seven
termination styles with choice of
low inductance winding
mounting arrangements
Seven termination styles with choice of mounting arrangements
• Manufactured RoHS compliant
Pb-free
Manufactured RoHS compliant Pb-free terminations
terminations*
* Check status of stock when ordering
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
General Information
Vitreous enamelled wirewound resistors are capable of
withstanding a higher dissipation size for size, than any other
protected type; this is attributable to the higher operating
temperature which the wire and enamel can withstand.
Vitreous enamel provides exceptionally good protection to the
wire element and is essentially impervious to moisture. The
resistors can safely be used in harsh environmental conditions.
The Welwyn range is based on thirteen sizes of tube, each of
which has a recommended maximum dissipation which limits
operating surface temperature to a maximum of 375°C.
The stability and high reliability of Welwyn tubular vitreous
resistors is a direct result of the best quality materials being
used in their construction.
High purity ceramic tubes have been matched with nickel
chromium resistance wires and specially formulated enamel to
ensure that the resistors can withstand repeated heat cycling
without damage.
Connections between the resistance element and end
terminations are welded; other connections are brazed.
Mounting devices are available which permit resistors to be
mounted by both ends or by one end. Single ended mounting
is recommended for applications which do not subject the
resistor to shock or vibration.
Ferrules and the F type mounting plug are anchored into the
tubes with high temperature adhesive.
Special requirements, for types or styles not described
in this brochure, will be considered for economic
quantities.
Electrical Data
Power rating at 70°C
Resistance range
Limiting element voltage
TCR (-55 to +200°C)
Resistance tolerance
Values
Thermal impedance
Operating temperature range
watts
ohms
volts
ppm/°C
%
Power rating at 70°C
Resistance range
Limiting element voltage
TCR (-55 to +200°C)
Resistance tolerance
Values
Thermal impedance
Operating temperature range
watts
ohms
volts
ppm/°C
%
1601
11
°C/watt
°C
°C/watt
°C
1605
47
1905
16
1600
16.5
1602
1906
1603
1604
17
22
25
35
See Table 1
See Table 1
Typically: <+75
Maximum + 200
1, 2, 5, 10
See table 1 for value restrictions
E24 preferred
See fig. 1
-55 to +375
1908
54
1607
1606
76
91
See Table 1
See Table 1
Typically: <+75
1, 2, 5, 10
1608
115
1609
165
Maximum + 150
See table 1 for value restrictions
E24 preferred
See fig. 1
- 55 to +375
Note See Figure 1 for curves of temperature rise / watts dissipation.
GeneralNote
Note
General
BI Technologies IRC Welwyn
Welwyn Components reserves the right to make changes in product specification without notice or liability.
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data, relates to current manufacture and is considered accurate at time of going to print.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone:
+44 (0) plc
1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
©
TT Electronics
A subsidiary of
TT electronics plc
www.ttelectronicsresistors.com
09.09
07.16
121
Tubular
Tubular Vitreous
Vitreous Enamelled
Enamelled
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Wirewound
Resistors
Wirewound
Resistors
Wirewound
Resistors
Wirewound
1600/1900
Series Resistors
Welwyn
WelwynComponents
Components
Welwyn Components
1600/1900
Series
1600/1900 Series
1600/1900 Series
Electrical
Electrical Data
Data (continued)
(continued)
(continued)
Electrical
Data
Table
1
Table 1
Table 1
Type
Type
Type
1601
1601
1601
1905
1905
1905
1600
1600
1600
1602
1602
1602
1906
1906
1906
1603
1603
1603
1604
1604
1604
1605
1605
1605
1908
1908
1908
1607
1607
1607
1606
1606
1606
1608
1608
1608
1609
1609
1609
*Dissipation (watts) to
*Dissipation (watts) to
produce operating
*Dissipation
(watts) to
produce operating
hotspot
temperature
(°C) of:
produce
operating
hotspot temperature (°C) of:
Ambient
= 20°C
hotspot temperature
(°C)Ambient
of:
Ambient = 20°C
Ambient
=
70°C
Ambient = 20°C
Ambient
= 70°C
= 70°C
200
200
5
200
5
75
7
7.57
7.5
87.5
8
9.58
9.5
9.5
11
11
11
15.5
15.5
15.5
21
21
21
24
24
24
34
34
34
41
41
41
52
52
52
74
74
74
300
300
10
300
10
10
14.5
14.5
14.5
15
15
15
15.5
15.5
15.5
19
19
19
22
22
22
31
31
31
41
41
41
47
47
47
66
66
66
80
80
80
101
101
101
145
145
145
375
375
14
375
14
14
20
20
20
21
21
21
22
22
22
28
28
28
32
32
32
45
45
45
59
59
59
68
68
68
95
95
95
115
115
115
145
145
145
208
208
208
375
375
11
375
11
11
16
16
16
16.5
16.5
16.5
17
17
17
22
22
22
25
25
25
35
35
35
47
47
47
54
54
54
76
76
76
91
91
91
115
115
115
165
165
165
Resistance range (ohms)
Resistance range (ohms)
Resistance range (ohms)
Minimum
Minimum
resistance
at
Minimum
resistance
at
resistance at
±5%
±5%
1
±5%
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
11
1
1
±2%
±2%
15
±2%
15
15
15
15
15
15
15
15
20
20
20
20
20
20
20
20
20
20
20
20
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
35
35
35
Max. at
Max. at
any at
Max.
any
±1%
tolerance
any
±1%
tolerance
25
15k
±1%
tolerance
25
15k
25
15k
30
30k
30
30k
30
30k
30
56k
30
56k
30
56k
25
43k
25
43k
25
43k
30
50k
30
50k
30
50k
30
83k
30
83k
30
83k
60
100k
60
100k
60
100k
40
100k
40
100k
40
100k
40
100k
40
100k
40
100k
50
100k
50
100k
50
100k
40
160k
40
160k
40
160k
50
180k
50
180k
50
180k
50
250k
50
250k
50
250k
Limiting
Limiting
element
Limiting
element
voltage
element
voltage
Termination
voltage
Termination
style
Termination
style
style
C
C
250
C
250
250
-500500
500
700
700
700
850
850
850
1300
1300
1300
1100
1100
1100
1200
1200
1200
1300
1300
1300
2100
2100
2100
2100
2100
2100
3000
3000
3000
*The stated dissipation applies to resistors mounted horizontally with unobstructed bore.
*The
*The stated
stated dissipation
dissipation applies
applies to
to resistors
resistors mounted
mounted horizontally
horizontally with
with unobstructed
unobstructed bore.
bore.
Performance
Data
Performance
Performance Data
Data
Load : 1000 hours at 70°C
Load
Load :: 1000
1000 hours
hours at
at 70°C
70°C
Shelf life : 12 months at room temperature
Shelf
life
:
12
months
Shelf life : 12 months at
at room
room temperature
temperature
Climatic
Climatic
Climatic
Long term damp heat
Long
Long term
term damp
damp heat
heat
Bump and vibration
Bump
and
vibration
Bump and vibration
Noise (in a decade of frequency)
Noise (in a decade of frequency)
Pulse Handling Data
Pulse Handling Data
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
Max
Max
Max
5.0
5.0
5.0
1.0
1.0
1.0
0.5
0.5
0.5
0.2
0.2
0.2
0.1
0.1
0.1
zero
zero
Low inductance
Low inductance
winding
resistance
Low inductance
winding
resistance
range (ohms)
winding
range resistance
(ohms)
Min. res.
at (ohms)
range
Min. res. at
Min. res. at
Max. at
Max. at
either
Max.
eitherat
All others ±10%
±5%
tolerance
either
All others ±10%
±5%
tolerance
150
10
50
1.3k
All
others ±10%
±5%
tolerance
150
10
50
1.3k
150
10
50
1.3k
450
10
50
3.5k
450
10
50
3.5k
450
10
50
3.5k
600
10
50
5.0k
600
10
50
5.0k
600
10
50
5.0k
350
10
50
4.0k
350
10
50
4.0k
350
10
50
4.0k
550
10
50
5.5k
550
10
50
5.5k
550
10
50
5.5k
750
10
50
7.5k
750
10
50
7.5k
750
10
50
7.5k
1000
15
50
11.5k
1000
15
50
11.5k
1000
15
50
11.5k
900
15
50
14k
900
15
50
14k
900
15
50
14k
1000
10
50
16k
1000
10
50
16k
1000
10
50
16k
900
15
50
22k
900
15
50
22k
900
15
50
22k
1900
15
50
32k
1900
15
50
32k
1900
15
50
32k
1800
20
50
38k
1800
20
50
38k
1800
20
50
38k
2500
30
100
58k
2500
30
100
58k
2500
30
100
58k
Available by request
Available by request
Typ
Typ
Typ
3.5
3.5
3.5
0.1
0.1
0.1
0.35
0.35
0.35
0.05
0.05
0.05
0.02
0.02
0.02
zero
zero
Temperature rise graph figure 1
Power - W
General Note
BI Technologies IRC Welwyn
TT Electronics reserves the right to make changes in product specification without notice or liability.
©©
Welwyn
Limited
Bedlington,
WelwynComponents
Components
Limited
Bedlington,Northumberland
NorthumberlandNE22
NE227AA,
7AA,UK
UK
All information
isComponents
subject
TT Electronics’
own+44
data(0)
and
is considered
at time
of going
©
Welwyn
Bedlington,
Northumberland
7AA,
UK to print.
Telephone:
+44 (0)
1670 to
822181
· Limited
Facsimile:
1670
829465 ·accurate
Email: NE22
info@welwyn-tt.com
· Website: www.welwyn-tt.com
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
122
122
122
09.09
09.09
www.ttelectronicsresistors.com
09.09
© TT Electronics plc
07.16
Tubular Vitreous Enamelled
Wirewound
Resistors
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
1600/1900
Series
Wirewound Resistors
Wirewound Resistors
Welwyn Components
1600/1900 Series
Welwyn Components
1600/1900 Series
Physical Data
Table 2 Dimensions in millimetres. See fig 2-8 for styles
Physical Data
A
B
C
D
E
Table
2 Dimensions
inmax
millimetres.
See fig
2-8 formax
styles
Type
max
max
nom
1601
33.0
A
17.5
B
8.2
C
4.5
D
5.0
E
F
G
H
max
nom
±.25
19.5
F
15
G
3.0
H
J
K
max
M3
J
59
K
1905
Type
56.1
max
14.5
max
6.55
max
4.5
nom
5.0
max
17.5
max
10
nom
3.0
±.25
M3
max
1601
1600
33.0
61.5
17.5
14.5
8.2
6.55
4.5
5.0
19.5
17.5
15
10
3.0
M3
59
-
1905
1602
56.1
51.0
14.5
17.5
6.55
8.2
4.5
5.0
17.5
19.5
10
15
3.0
M3
77
1600
1906
61.5
64.3
14.5
17.5
6.55
8.2
4.5
4.5
5.0
5.0
17.5
19.5
10
15
3.0
3.0
M3
M3
90
1602
1603
51.0
74.5
17.5
17.5
8.2
8.2
4.5
4.5
5.0
5.0
19.5
19.5
15
15
3.0
3.0
M3
M3
77
101
1906
1604
64.3
102
17.5
17.5
8.2
8.2
4.5
4.5
5.0
5.0
19.5
19.5
15
15
3.0
3.0
M3
M3
90
128
1603
1605
74.5
89.5
17.5
24.0
8.2
13.2
4.5
5.7
5.0
6.8
19.5
26.5
15
17
3.0
4.0
M3
M4
101
122
1604
102
17.5
8.2
4.5
5.0
19.5
15
3.0
M3
128
1605
89.5
24.0
13.2
5.7
6.8
26.5
17
4.0
M4
122
1908
102
24.0
13.2
5.7
6.8
26.5
17
4.0
M4
134
1607
102
32.0
19.2
7.0
9.8
32.0
22
6.4
M6
134
1606
166
24.0
13.2
5.7
6.8
26.5
17
4.0
M4
198
1608
152
32.0
19.2
7.0
9.8
32.0
22
6.4
M6
184
1609
216
32.0
19.2
7.0
9.8
32.0
22
6.4
M6
248
1908
1607
1606
1608
1609
102
102
166
152
216
24.0
32.0
24.0
32.0
32.0
13.2
19.2
13.2
19.2
19.2
5.7
7.0
5.7
7.0
7.0
6.8
9.8
6.8
9.8
9.8
26.5
32.0
26.5
32.0
32.0
17
22
17
22
22
4.0
6.4
4.0
6.4
6.4
M4
M6
M4
M6
M6
134
134
198
184
248
Terminations
Terminations
Styles B, 4B, AP and AW are available in all 13 tube sizes.
Ferrule, electrically isolated (Figure 6) Connection to
Styles C, CB and CP are available in sizes 1601 to 1609
Ferrule, electrically isolated (Figure 6) Connection to
resistor via Pb free solder coated nickle iron lugs. Denoted
resistor via Pb free solder coated nickle iron lugs. Denoted
by prefix CB, thus: CB1602.
by prefix CB, thus: CB1602.
Lugs (Figure
(Figure 2):
2): Pb
Pb free
free solder
solder coated
coated nickel
nickel iron.
iron. Denoted
Denoted
Lugs
by
prefix
B
to
size
reference,
thus
B1602
by prefix B to size reference, thus B1602
Ferrule, electrically
electrically live
live (Figure
(Figure 7)
7) Nickel
Nickel plated
plated brass.
brass.
Ferrule,
Denoted
by
prefix
C,
thus:
C1602.
Denoted by prefix C, thus: C1602.
Styles B, 4B, AP and AW are available in all 13 tube sizes.
Styles C, CB and CP are available in sizes 1601 to 1609
inclusive, 1906 and 1908
inclusive, 1906 and 1908
Pigtails (Figure
(Figure 3):
3): 14/.193
14/.193 mm
mm copper,
copper, 150
150 mm
mm minimum
minimum
Pigtails
length. Denoted
Denoted by
by prefix
prefix AP,
AP, thus
thus AP1602
AP1602
length.
Rigid wires (Figure 4): 1.2 mm diameter tinned copper, 32
mm minimum length.
Denoted by prefix AW, thus: AW1602
Lugs with screws, nuts and washers (Figure 5): Nickel
plated
plated brass
brass screws
screws and
and nuts.
nuts. Denoted
Denoted by
by prefix
prefix 4B,
4B,
thus:
4B1602.
thus: 4B1602.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Ferrule, electrically
electrically isolated
isolated (Figure
(Figure 8):
8): Connection
Connection to
to
Ferrule,
resistor via
via pigtails
pigtails of
of 14/.193
14/.193 mm
mm copper,
copper, 150mm
150mm
resistor
minimum length. Denoted by prefix CP thus: CP1602
Marking The resistors are legend marked with type
reference, resistance value, tolerance and manufacturing
date code. Value marking conforms to IEC 62.
Solvent resistance: The vitreous coating and marking are
resistant
resistant to
to all
all accepted
accepted industrial
industrial cleaning
cleaning fluids.
fluids.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone:
+44
(0) 1670
822181
· Facsimile:
(0) 1670
829465 · without
Email: info@welwyn-tt.com
· Website: www.welwyn-tt.com
TT
Electronics
reserves
the right
to make
changes+44
in product
specification
notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
09.09
BI Technologies IRC Welwyn
09.09
General Note
Telephone:
+44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
www.ttelectronicsresistors.com
© TT Electronics plc
07.16
123
123
Tubular Vitreous Enamelled
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Wirewound
Resistors
Wirewound
Resistors
Wirewound
Resistors
Wirewound
Resistors
1600/1900
Series
1600/1900Series
Series
1600/1900
1600/1900
1600/1900 Series
Series
Adjustable Resistors (see Figure 9)
Adjustable
Resistors
Figure
Adjustable resistors
use the(see
same
basic9)construction as fixed
Adjustable
Resistors
Figure
9)construction as fixed
Adjustable
Resistors
(see
Figure
Adjustable
resistors
use the(see
same
basic
resistors
already
described,
and
have
a9)window
in the vitreous
Adjustable
resistors
use
the
same
basic
construction
fixed
Adjustable
resistors
usecontact
the and
same
basic
construction
asvitreous
fixed
resistors
already
described,
a window
in theas
enamel
through
which
ishave
made
to the resistive
resistors
already
described,
and
have
a
window
in
the
vitreous
resistorsthrough
already
described,
and
a window
in thewith
vitreous
enamel
which
contact
ishave
made
to theisresistive
element
by a sliding
contact
band.
The
band
fitted
a
enamel
which
contact
is
to
the
enamel through
through
which
contact
is made
made
to in
the
resistive
element
by
a sliding
contact
band.
band
isresistive
fitted with a
clamping
screw
and
nut
to retain
it The
firmly
position.
element
aa sliding
contact
band.
band
is
element by
by
sliding
contact
band.it The
The
band
is fitted
fitted with
with aa
clamping
screw
and nut
to retain
firmly
in position.
The
adjustable
winding
style
has aitmaximum
permissible hot
clamping
screw
and
nut
to
retain
firmly
in
position.
clamping
screwwinding
and nutstyle
to retain
firmly in position.
The adjustable
hasthe
aitmaximum
spot
temperature
of 300°C and
maximumpermissible
dissipation,hot
for
The
adjustable
winding
style
has
a
maximum
permissible
hot
Theambient
adjustable
winding
style
hasthe
aismaximum
hot
spot
temperature
of 300°C
and
maximum
for
an
temperature
of 20°C,
specified permissible
indissipation,
Table 4. The
spot
temperature
of
and
for
spotambient
temperature
of 300°C
300°C
and the
the
maximum
dissipation,
for
an
temperature
of 20°C,
is maximum
specified indissipation,
Table 4. The
an
ambient
temperature
of
20°C,
is
specified
in
Table
4.
The
an
ambient
temperature
of
20°C,
is
specified
in
Table
4.
The
Table 3
Table 3
Table
Tube 3
Table
3
Tube
size
Tube
Tube
size
size
size
1602
1602
1603
1602
1602
1603
1906
1603
1603
1906
1604
1906
1906
1604
1605
1604
1604
1605
1908
1605
1605
1908
1606
1908
1908
1606
1607
1606
1606
1607
1608
1607
1607
1608
1609
1608
1608
1609
1609
1609
Table
Table
Table
Table
Type
Type
Type
Type
1602
1602
1906
1602
1602
1906
1603
1906
1906
1603
1604
1603
1603
1604
1605
1604
1604
1605
1908
1605
1605
1908
1607
1908
1908
1607
1606
1607
1607
1606
1608
1606
1606
1608
1609
1608
1608
1609
1609
1609
4
4
4
4
A mm
Amax.
mm
A
mm
Amax.
mm
max.
max.
B mm
Bmax.
mm
B
mm
Bmax.
mm
max.
max.
Hole C
Holemm
C
dia.
Hole
C
Holemm
C
dia.
dia.
mm
dia. mm
20
20
20
20
27
27
27
27
3.2
3.2
3.2
3.2
Max. no of
Max.
no of
adjusting
Max.
no
Max.
no of
of
adjusting
bands
adjusting
adjusting
bands
bands
bands
1
1
1
1
20
20
25
20
20
25
25
25
25
25
30
25
25
30
30
30
30
30
30
30
30
30
30
30
27
27
32
27
27
32
32
32
32
32
38
32
32
38
38
38
38
38
38
38
38
38
38
38
3.2
3.2
3.7
3.2
3.2
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3
3
2
3
3
2
4
2
2
4
2
4
4
2
3
2
2
3
5
3
3
5
5
5
Max. dissipation in
Max.ambient
dissipation
in
20°C
(watts)
Max.
dissipation
in
Max.ambient
dissipation
in
20°C
(watts)
20°C
ambient
(watts)
20°C
ambient
(watts)
200°C
300°C
200°C
hot
spot
200°C
200°C
hot
8spot
hot
hot 8spot
spot
9.5
8
8
9.5
11
9.5
9.5
11
16
11
11
16
21
16
16
21
24
21
21
24
34
24
24
34
41
34
34
41
52
41
41
52
74
52
52
74
74
74
300°C
hot
spot
300°C
300°C
hot
spot
15.5
hot
spot
hot
spot
15.5
19
15.5
15.5
19
22
19
19
22
31
22
22
31
41
31
31
41
47
41
41
47
66
47
47
66
80
66
66
80
101
80
80
101
145
101
101
145
145
145
Welwyn Components
Welwyn Components
Welwyn
Welwyn Components
Components
partial open winding necessitates a reduced maximum
partial openwhen
winding
necessitates
a reduced
maximum
resistance,
compared
with fixed
resistors,
and the
partial
winding
necessitates
aa reduced
maximum
partial open
open
winding
necessitates
reduced
resistance,
when
withinfixed
resistors,
and the
resistance
range
iscompared
also
defined
Table
4. maximum
resistance,
when
with
resistors,
and
resistance,range
when iscompared
compared
withinfixed
fixed
resistors,
and the
the
resistance
also
defined
Table
4.
More
thanrange
one adjusting
band can
be fitted,
up to the
resistance
is
also
defined
in
Table
4.
resistance
range
is also defined
in Table
4. up to the
More
than
one
adjusting
band
can
be
fitted,
maximum number specified in Table 3.
More
one
can
More than
thannumber
one adjusting
adjusting band
band
can be
be
fitted, up
up to
to the
the
maximum
in Table
3.fitted,
Adjustable
resistorsspecified
are available
in termination
styles B, 4B,
maximum
number
specified
in
Table
3.
maximum
number
specified
in
Table
3.
Adjustable
resistors
available
in 1609
termination
styles
4B,
AP, C, CB and
CP, inare
sizes
1602 to
inclusive
and B,
1906
Adjustable
resistors
are
available
in
termination
styles
B,
4B,
Adjustable
resistors
are
available
in
termination
styles
B,
4B,
AP,
C,
CB
and
CP,
in
sizes
1602
to
1609
inclusive
and
1906
and 1908 denoted by prefix ‘V’.
AP,
C,
CB
and
CP,
in
sizes
1602
to
1609
inclusive
and
1906
AP, C,
CB and
CP, inbysizes
1602
and
1908
denoted
prefix
‘V’.to 1609 inclusive and 1906
and
and 1908
1908 denoted
denoted by
by prefix
prefix ‘V’.
‘V’.
Min. for
Min. for
styles
VC,
Min.
for
Min.
styles
VC,
VCPfor
styles
VC,
styles
VCP
4 VC,
VCP
VCP
4
4
4
4
4
6
4
4
6
8
6
6
8
6
8
8
6
11
6
6
11
11
11
11
11
14
11
11
14
17
14
14
17
25
17
17
25
25
25
Resistance range (ohms)
Resistance range (ohms)
Resistance
range
(ohms)
Resistance
range
Min.
for (ohms)
Min.
for
all
other
Min.
for
Min.
for
all
other
styles
all
other
allstyles
other
3
styles
styles
3
3
3
3
3
6
3
3
6
8
6
6
8
6
8
8
6
10
6
6
10
9
10
10
9
13
9
9
13
16
13
13
16
24
16
16
24
24
24
Max. for
Max.
for
all styles
Max.
for
Max.
for
all styles
all
styles
all1.6k
styles
1.6k
2.5k
1.6k
1.6k
2.5k
3.0k
2.5k
2.5k
3.0k
5.3k
3.0k
3.0k
5.3k
4.5k
5.3k
5.3k
4.5k
7.5k
4.5k
4.5k
7.5k
8.1k
7.5k
7.5k
8.1k
13.2k
8.1k
8.1k
13.2k
15.4k
13.2k
13.2k
15.4k
25.5k
15.4k
15.4k
25.5k
25.5k
25.5k
Manufactured Values
Manufactured
Values
E24 preferred
Manufactured
Values
Manufactured
Values
E24 preferred
E24
preferred
E24
preferredSelection Tolerance ±10%
Standard
Standard
Selection
Tolerance
±10%
All
other details
of the electrical
and environmental
Standard
Selection
Tolerance
±10%
Standard
Selection
Tolerance
±10%
All
other details
of the electrical
andare
environmental
performance
of adjustable
resistors
the same as for
All
details
of
and
environmental
All other
other
details
of the
the electrical
electrical
andare
environmental
performance
of adjustable
resistors
the same as for
fixed
resistors.
performance
of
adjustable
resistors
are
performance
the same
same as
as for
for
fixed
resistors.of adjustable resistors are the
fixed
resistors.
fixed resistors.
General Note
BI Technologies IRC Welwyn
© Electronics
Welwynreserves
Components
Limited
Bedlington,
Northumberland
NE22
7AA,
UK
TT
the right to make
changes
in product specification
without
notice
or liability.
09.09
Telephone:
+44
(0)
1670
822181
·
Facsimile:
+44
(0)
1670
829465
·
Email:
info@welwyn-tt.com
·
Website:
www.welwyn-tt.com
All
subject to TT Electronics’
own Bedlington,
data and is considered
accurateNE22
at time
of going
© information
WelwynisComponents
Limited
Northumberland
7AA,
UK to print.
www.ttelectronicsresistors.com
09.09
Telephone:
+44Components
(0) 1670 822181Limited
· Facsimile:Bedlington,
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829465 · Email:
info@welwyn-tt.com
· Website: www.welwyn-tt.com
©
Welwyn
Northumberland
NE22
7AA,
UK
©
Welwyn
Components
Limited
Bedlington,
Northumberland
NE22
7AA,
UK
124 Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
09.09
©
TT Electronics
09.09
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124
07.16
124
124
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Wirewound
Resistors
Wirewound
Resistors
1600/1900 Series
1600/1900 Series
Welwyn Components
Tapped Resistors See Figure 10
Ordering Procedure
Fixed resistors can be supplied with taps to special order.
Because of the reduced winding length, the total resistance of
a tapped resistor will be less than can be offered on a fixed
resistor of the same size. The reduction is proportional to the
number of taps and Table 5 is intended as a guide.
Enquiries for tapped resistors must state the following details:
Resistance per section
Maximum dissipation per section
Maximum operating ambient temperature
Maximum permissible dimensions if important
The minimum resistance per section on all sizes is 1Ω and the
standard selection tolerance for any section is ±10%
Type of terminations required. (See ‘Terminations’, page 3)
Resistor style or proposed method of mounting.
Table 5
Type
Maximum*
total
dissipation
in 20°C
ambient
(watts) with
single tap
Maximum*
resistance
with single
tap
(ohms)
Maximum*
number
of taps
1905
14.5
9k
1
1600
15.0
12k
1
1602
15.5
9k
1
1906
19.0
13k
1
1603
22
18k
1
1604
31
29k
2
1605
41
34k
2
1908
47
38k
2
1607
66
53k
2
1606
80
78k
4
1608
101
93k
4
1609
145
140k
4
Low Inductance Resistors
Ayrton-Perry wound elements are supplied for low inductance
applications. This winding style has a maximum permissible
hot spot temperature of 300°C. The maximum dissipation is
defined in Table 1 under the heading Operating hot spot
temperature of 300°C, and resistance ranges are defined in
the three right-hand columns of this table.
Application Notes
When cold, vitreous enamel has excellent insulation resistance.
In common with all insulants the specific resistance of the
enamel decreases with increased temperature; therefore, if
operated at any temperature approaching the maximum, the
resistor cannot be classed as an insulated type and should not
be used in contact with any conducting materials.
*Maximum total dissipation assumes that this will be
evenly spread over the total element length.
The recommended dissipations for each of the resistor hot
spot temperatures applies to resistors mounted horizontally. If
the bore is completely blocked a 15% derating is
recommended. However, wherever possible, resistors should
be mounted vertically with unobstructed bore.
This makes best use of the chimney effect of the heated tube
and will encourage a cooling stream of air through the bore.
Allowances must be made, when tubular resistors are mounted
in banks, for the effects produced by radiation between tubes.
Appreciable reduction of hot spot temperature can be
achieved by arranging that resistors are subjected to some
measure of forced draught. In general, it is most efficient to
extract air from the resistor enclosure and arrange that an air
inlet is adjacent to the bottom of the tubes.
If soft soldered connections are used the resistors should be derated
where applicable to limit the hot spot temperature to 300°C.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
©
TT Electronics
Telephone:
+44 (0) plc
1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
www.ttelectronicsresistors.com
09.09
07.16
123
Tubular Vitreous Enamelled
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Tubular
Vitreous
Enamelled
Wirewound
Resistors
Wirewound
Resistors
Wirewound
Resistors
Wirewound
Resistors
Welwyn
Components
Welwyn
Welwyn Components
Components
1600/1900
Series
1600/1900
1600/1900
Series
1600/1900Series
Series
Table
6 mounting
clip dimension
(mm) See
Fig. 11
Table
Table 6
6 mounting
mounting clip
clip dimension
dimension (mm)
(mm) See
See Fig.
Fig. 11
11
Clip
Clip
Clip
ref.
ref.
ref.
MD1
MD1
MD1
MD4
MD4
MD4
MD3
MD3
MD3
MD6
MD6
MD6
Type A
B
C
D
E
F
G
Type A
B
C
D
E
F
G
Type
A max
B nom.
C max
D max
E
F ±0.2
G
type nom.
max
type nom. max nom. max max max ±0.2
type nom. max nom. max max max ±0.2
1601
1601
1601
1602
1602
1602
1603
1603
1603
1604
1604
1604
1605
1605
1605
1906
1906
1906
1607
1607
1607
1608
1608
1608
1609
1609
1609
52
52
52
70
70
70
90
90
90
121
121
121
108
108
108
83
83
83
125
125
125
176
176
176
240
240
240
68
68
68
86
86
86
106
106
106
137
137
137
128
128
128
99
99
99
146
146
146
197
197
197
261
261
261
29
29
29
49
49
49
19
19
19
33
33
33
17.5 14.5 4.8
17.5 14.5 4.8
17.5 14.5 4.8
32.0 19.0 6.4
32.0 19.0 6.4
32.0 19.0 6.4
H
H
H
dia
dia
dia
J
J
J
dia
dia
dia
K
Auxiliary
K
Auxiliary
K
Auxiliary
nom
locking
nom locking
nom spring
locking
ref
spring ref
spring ref
4.0
4.0
4.0
3.9
3.9
3.9
7.2
7.2
7.2
4.0
4.0
4.0
6.3
6.3
6.3
9.5
9.5
9.5
MD16
MD16
MD16
MD18
MD18
MD18
These mounting clips are suitable for termination styles C, CB and CP.
These
clips
are suitable
for termination
styles
CB and
CP.
These 5mounting
mounting
clips
termination
styles C,
C,
CP. to
MD4,
and 6 have
anare
earsuitable
formed for
in the
bottom surface
of CB
theand
bracket
MD4,
5
and
6
have
an
ear
formed
in
the
bottom
surface
of
the
bracket
to
MD4,
5
and
6
have
an
ear
formed
in
the
bottom
surface
of
the
bracket
to
prevent rotation of the mounting plate. The auxiliary locking springs
prevent
rotation
of
the
mounting
plate.
The
auxiliary
locking
springs
prevent
rotation
of
the
mounting
plate.
The
auxiliary
locking
springs
ensure positive retention of the tube under severe mechanical shock
ensure
retention of
the tube under severe mechanical shock
ensure positive
positive
conditions.
See retention
Figure 11.of the tube under severe mechanical shock
conditions.
See
Figure
11.
conditions. See Figure 11.
Ordering
Procedure
Ordering
Procedure
Ordering
Procedure
Mounting clips
(and auxiliary locking
Mounting
clips
(and
locking
Mounting
clipsrequired)
(and auxiliary
auxiliary
springs when
shouldlocking
be ordered
springs
when
required)
should
ordered
springs
required)
should be
be
ordered
in units when
and the
type reference
specified.
in
units
and
the
type
reference
specified.
in units and the type reference specified.
Table
7 Mounting
brackets dimensions
(mm). See
Fig. 12.
Table
Table 7
7 Mounting
Mounting brackets
brackets dimensions
dimensions (mm).
(mm). See
See Fig.
Fig. 12.
12.
Bracket
Bracket
Bracket
ref.
ref.
ref.
MD40
MD40
MD40
MD41
MD41
MD41
MD42
MD42
MD42
MD43
MD43
MD43
Type
Type
Type
A
A
A
nom
nom
nom
78
78
78
73
73
73
50
50
50
68
68
68
91
91
91
119
119
119
81
81
81
106
106
106
183
183
183
119
119
119
121
121
121
171
171
171
235
235
235
1600
1600
1600
1905
1905
1905
1601
1601
1601
1602
1602
1602
1603
1603
1603
1604
1604
1604
1906
1906
1906
1605
1605
1605
1606
1606
1606
1908
1908
1908
1607
1607
1607
1608
1608
1608
1609
1609
1609
B
B
B
nom
nom
nom
92
92
92
87
87
87
64
64
64
82
82
82
105
105
105
133
133
133
95
95
95
120
120
120
197
197
197
133
133
133
143
143
143
193
193
193
257
257
257
C
C
C
nom
nom
nom
10
10
10
D
D
D
nom
nom
nom
20
20
20
E
E
E
nom
nom
nom
4.2
4.2
4.2
13
13
13
20
20
20
4.2
4.2
4.2
20
20
20
25
25
25
5.2
5.2
5.2
28
28
28
30
30
30
5.2
5.2
5.2
These brackets are suitable for termination styles B, 4B, AP & AW
These
These brackets
brackets are
are suitable
suitable for
for termination
termination styles
styles B,
B, 4B,
4B, AP
AP &
& AW
AW
Table
8 Mounting
plug dimensions
(mm) See
Fig. 13.
Table
Table 8
8 Mounting
Mounting plug
plug dimensions
dimensions (mm)
(mm) See
See Fig.
Fig. 13.
13.
Type
Type
Type
1601
1601
1601
1602
1602
1602
1603
1603
1603
1604
1604
1604
1906
1906
1906
1605
1605
1605
1606
1606
1606
1908
1908
1908
1607
1607
1607
1608
1608
1608
1609
1609
1609
A
A
A
Min.
Min.
Min.
B
B
B
Max.
Max.
Max.
General Note
126
126
126
Mounting
brackets
should
ordered
Mounting
brackets
should be
bespecified.
ordered in
in
units and the
type reference
units
and
the
type
reference
specified.
units and the type reference specified.
C
C
C
1.6
1.6
1.6
3.7
3.7
3.7
5.3
5.3
5.3
M4
M4
M4
1.6
1.6
1.6
3.7
3.7
3.7
5.3
5.3
5.3
M5
M5
M5
3.2
3.2
3.2
5.2
5.2
5.2
6.8
6.8
6.8
M6
M6
M6
F type bushes are suitable for termination styles B, 4B AP and AW
FF type
type bushes
bushes are
are suitable
suitable for
for termination
termination styles
styles B,
B, 4B
4B AP
AP and
and AW
AW
Ordering
Procedure
Ordering
Procedure
Ordering
Procedure
Mounting brackets
should be ordered in
Ordering
Procedure
Ordering
Procedure
Ordering
Procedure
Mounting plugs
are denoted by the prefix
Mounting
plugs
are denoted
by
Mounting
plugs
by the
the prefix
prefix
‘F’
added to
the are
sizedenoted
reference;
‘F’
added
to
the
size
reference;
‘F’ added
to the
reference;
e.g.
BF1602
andsize
APF1602.
e.g.
e.g. BF1602
BF1602 and
and APF1602.
APF1602.
BI Technologies IRC Welwyn
TT Electronics reserves the right to make changes in product specification without notice or liability.
All
subject to TT Electronics’
own Bedlington,
data and is considered
accurateNE22
at time
of going
© information
WelwynisComponents
Limited
Northumberland
7AA,
UK to print.
©
Welwyn
Northumberland
NE22
7AA, UK
Telephone:
+44Components
(0) 1670 822181Limited
· Facsimile:Bedlington,
+44 (0) 1670
829465 · Email:
info@welwyn-tt.com
· Website: www.welwyn-tt.com
©
Welwyn
Components
Limited
Bedlington,
Northumberland
NE22
7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone:
+44 (0) plc
1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
©
TT Electronics
www.ttelectronicsresistors.com
09.09
09.09
09.09
07.16
Tubular Vitreous Enamelled
Tubular Vitreous
Wirewound
ResistorsEnamelled
Wirewound
1600/1900 Series Resistors
Welwyn Components
1600/1900 Series
Ordering Procedure
Specify the full type reference, resistance value and tolerance, using IEC 62 code references.
The addition of L to the prefix describing terminal configuration indicates Ayrton-Perry winding.
Example: Electrically live ferrule terminated 1601 size at 10 ohms and 5% -
C
1601
-
10R
J
I
Adjustable Option
Fixed
V
Adjustable
Termination Style
B
AP
AW
4B
CB
C
CP
See Figures 2 to 8
Winding & Mounting Options
Standard
L
Low Inductance
F
Mounting plug
Tube Size
Value (USE IEC62 code)
Tolerance (use IEC62 code)
F
1%
G
2%
J
5%
K
10%
Packing
I
Box
Standard
Note - consult data sheet in detail for valid combinations.
Minimium Ordering Quantity: 10
Order Multiple: 1
Note - adjustable option V with termination style 4B is coded 4VB
General Note
BI Technologies IRC Welwyn
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
TT Electronics
the822181
right to·make
changes
specification
without
notice or liability.· Website: www.welwyn-tt.com
Telephone:
+44reserves
(0) 1670
Facsimile:
+44in(0)product
1670 829465
· Email:
info@welwyn-tt.com
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
Issue E · 10.05
www.ttelectronicsresistors.com
© TT Electronics plc
07.16