General Purpose Surface
Resistors
Mounted
Resistors
General
Purpose
Surface
Mounted
Resistors
General
Purpose
Surface
WCR Series
Mounted
Resistors
Excellent
reliability
WCR Series
Welwyn Components
Welwyn Components
Wide range of sizes and ohmic values
Excellent
reliability
WCR
Series Wrap
around terminations
Wide range
of sizes
and ohmic
values
Inner
electrode
protection
Excellent reliability
around
terminations
Wrap
Wide range
of sizes
and ohmic values
Inner
electrode
protection
Wrap around terminations
Inner electrode protection
AEC-Q200 grade available
Electrical Data
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
0201
Electrical
Data
Power rating @ 70°C
0402
0603
0805
1206
1210
2010
2512
0.1
0.125
0.25
0.5
1.0
0.05
0.25
0.063
watts
Resistance range
ohms 10R to 1M0 1R0 to 1M0
1R0 to 10M
0603
0805
1206
2010
2512
1210
0402
0201
Limiting element votage
volts
150
25
50
200
0.1
0.125
0.25
0.5
1.0
0.05
0.063
Power ratingTCR*
@ 70°C
watts
100 0.25
200
250
ppm/°C
Resistance range
ohms 10R to 1M0 1R0 to 1M0
1R0 to 10M
1
Resistance Tolerance
%
Limiting element votage
volts
150
25
50
200
E24 or E96
Standard values
100
200
250
TCR*
ppm/°C
-55 to 155
Ambient temperature range
°C
1
Resistance Tolerance
%
Zero-ohm Jumper Chip Rating
amps
1.5
2
0.5
1
E24 or E96
Standard values
<50
Zero-ohm Jumper Chip Resistance milliohms
-55 to 155
Ambient temperature range
°C
* Notes – TCR for low values 1R to 10R: -400 to +600ppm/ºC, 11R to 100R: ±200ppm/ºC
Zero-ohm Jumper Chip Rating
amps
1.5
2
0.5
1
TCR for high values 3M3 to 10M: ±300ppm/º
<50
Zero-ohm Jumper Chip Resistance milliohms
Physical Data
Dimensions (mm)
Physical
Style DataL
* Notes – TCR for low values 1R to 10R: -400 to +600ppm/ºC, 11R to 100R: ±200ppm/ºC
TCR for high values 3M3 to 10M: ±300ppm/º
T
C
A
W
0.6 ± 0.03
0.23 ± 0.03
0.12 ± 0.05
0.15 ± 0.05
0.3 ± 0.03
0201
Dimensions (mm)
1.0 ± 0.1
0.35 ± 0.05
0.2 ± 0.1
0.25 ± 0.1
0.5 ± 0.05
0402
L
T
C
1.6 ± 0.15
0.5 ± 0.15
0.25 ±A0.2
0.25 ± 0.2
W
Style
0.8 ± 0.15
0603
C
A
0.6
± 0.03
0.23
0.03 0.5 +0.12
0.05
0.15
± 0.05
2.0
0.15± -0.10
0.4
± 0.2
0.4 ± 0.2
0.3± ±0.2
0.03 1.25+
0201
0.2±-0.1
0805
1.0
± 0.1
0.05 0.55 +0.15
0.2 ± 0.1
± 0.1 0.5+ 0.2 -0.25
L
3.2 +0.1
-0.1 0.5 +0.25
0.2-0.25
0.5 ±-0.25
0.05 1.6 +0.35
0402
0.1 ±-0.15
1206
W
A T
1.6
± 0.15 3.2 0.8
± 0.15 0.550.25
± 0.2
± 0.2
+ 0.1
-0.2
+0.15
-0.1
0.50.25
± 0.25
0.5 ± 0.2
± 0.15
0603
2.60.5
± 0.15
1210
A
Wrap-around terminations
2.0
± 0.2
0.4
0.2
± 0.2
5.0
± 0.15
±±
0.15
0.600.4
± 0.25
0.60 ± 0.25
1.25+
0.2 -0.1 0.5
0805
2.5 +± 0.15
0.15 -0.10 0.56
2010
(3 faces)
L
3.2 +0.1
-0.25
0.55
+0.15
-0.1
0.5
+
0.2-0.25
0.5+
0.2
-0.25
6.3
±
0.15
0.56
±
0.15
0.60
±
0.25
1.2
±
0.85
1.6
+
0.1
-0.15
1206
3.2 ± 0.15
W
2512
A
3.2 + 0.1 -0.2
0.55 +0.15 -0.1
0.5 ± 0.25
0.5 ± 0.2
2.6 ± 0.15
1210
Wrap-around terminations
5.0 ± 0.15
0.56 ± 0.15
0.60 ± 0.25
0.60 ± 0.25
2.5 ± 0.15
2010
Figure 1
(3 faces)
Construction
6.3
± 0.15
0.56 ± 0.15
0.60 ± 0.25
1.2 ± 0.85
3.2 ± 0.15
2512
The chips have a high alumina substrate (96% minimum) with
a ruthenium oxide resistance element and silver palladium,
Figure 1
Construction
nickel and tin plated terminations. A glazed protection coat
The chips have a high alumina substrate (96% minimum) with
is applied to the resistive element (See Fig.1)
a ruthenium oxide resistance element and silver palladium,
Terminations
nickel and tin plated terminations. A glazed protection coat
Solderability
The terminations meet the requirements of
is applied to the resistive element (See Fig.1)
IEC 115-1, Clause 4.17.3.2.
Terminations
Strength
The terminations meet requirements of
Solderability
The terminations meet the requirements of
IEC
68.2.21.
IEC 115-1, Clause
4.17.3.2.
Strength
Tin Plating
Epoxy
Melamine
Protection
Nickel Barrier
Glass
Dielectric
Silver
Dipped Conductor
Resistance Element
Palladium
Epoxy
Melamine
Protection
Glass
Dielectric
Silver
Resistance Element
Palladium
96% min Alumina Substrate
96% min Alumina Substrate
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
General
Note© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
General Note
T
Tin Plating
Nickel Barrier
Dipped Conductor
The terminations meet requirements of
IEC 68.2.21.
General Note
C
A subsidiary of
TT electronics plc
BI Technologies IRC Welwyn Iss 07.03
Welwyn
Components
reserves
the
right
to 822181
make
in product
notice
or liability.
Telephone:
+44
(0)
1670
· Facsimile:
+44 (0)specification
1670 829465
Email:
info@welwyn-tt.com
· Website: www.welwyn-tt.com
TT Electronics
reserves
the
right
to
make
changes
in changes
product
specification
without
noticewithout
or· liability.
All information is subject to Welwyn’s own data 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
© TT Electronics
plc 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone:
+44 (0) 1670
A subsidiary of
TT electronics plc
www.ttelectronicsresistors.com
Iss 07.03
04.16
General Purpose Surface
GeneralResistors
Purpose Surface
Mounted
Mounted
Resistors
WCR Series
Welwyn Components
WCR Series
Table 1
Marking
All resistors are individually marked with 3 digits. The first two
digits are the significant figures and the third defines the
number of added zeros. Jumpers are marked 000. Types 0201
and 0402 have no marking.
R e s i s t a n ce
v a lu e o h m s
100R
>100R, 1 0 K
>10K, 1 0 0 K
>100K, 1 M 0
>1 M 0
E96 1% components that can not be marked with 4 digits
will be marked with a standard 3 digit code. Details can be
supplied upon request.
N o ise
dB
-1 0
0
+1 5
+2 0
+3 0
Solvent Resistance
The protective epoxy lacquer and marking are resistant to all
normal industrial cleaning fluids suitable for printed circuits.
Performance Data
Maximum Change
0201
0402
0603
0805
1206
1210
2010
2512
Load: 1000 hrs at 70°C
R%
10R-100K : 1
>100K : 2
4R7-100K : 1
>100K : 2
1R-100K : 1
>100K : 2
1R-100K : 1
>100K : 2
1R-100K : 1
>100K : 2
1R-100K : 1
>100K : 2
1R-100K : 1
>100K : 2
3% + 0.1R
Shelf life: 12 months at room temp.
R%
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
zero @ 155 °C
Derate linearly to zero from 70°C
R%
2
2
2.5
2.5
2.5
2.5
2.5
5
Max voltage
volts
50
100
100
200
400
400
400
400
Climatic
R%
3
3
3
3
3
3
3
3
Short term overload (6.25 x rated power)
Climatic Catagory
Long term damp heat
55/125/56
1
R%
Temperature rapid change
R%
1
1
1
1
1
1
1
1
Resistance to solder heat
R%
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Vibration and bump
R%
1
1
1
1
1
1
1
1
500
500
500
500
Noise
see table 1
Insulation resistance
ohms
Voltage proof
volts
> 1G
100
300
500
Packaging
Packaging
All chips are tape mounted and supplied on standard 8mm
All chips are tape mounted and supplied on standard 8mm
tape reel, as IEC publication 286-3.
tape reel, as IEC publication 286-3.
180mm (7 inch) reel is standard
180mm (10
(7 inch)
standard
carries
5,000
pieces.
250mm
inch)reel
reeliscarrying
double
the
standard
quantity
(Except 0402 carries 10,000 pieces)
can be supplied by agreement.
Chip Resistor Labstock For Designers
WCR chip resistors are available in a special package of the most
popular sizes containing 50 each of the E24 values.
Please contact the sales desk for full details of this excellent
Note: For zero ohm jumper chips use the dummy value & tolerance code
General Note
R005J
BI Technologies IRC Welwyn
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information
subject
TT Electronics’
own data
is considered
time of going to print.· Website: www.welwyn-tt.com
Telephone:
+44is (0)
1670to822181
· Facsimile:
+44 and
(0) 1670
829465accurate
· Email:atinfo@welwyn-tt.com
© W elwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Issue D · 01.11
07.03
www.ttelectronicsresistors.com
© TT Electronics plc
04.16
General Purpose Surface
Mounted Resistors
WCR Series
Ordering
Procedure
Ordering
Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: WCR1206-10KFI (1206, 10 kilohms ±1%, Pb-free)
W
C
R
1
2
1
0
6
-
1
0
2
K
3
1
2
3
Type
Size
Value
Tolerance
E24 = 3 characters
E96 = 4 characters
R = ohms
K = kilohms
M = megohms
F = ±1%
I
4
5
4
5
Grade / Packing
1
1
WCR 0201
0402
0603
0805
1206
1210
2010
2512
F
I = Standard
A = AEC-Q200 grade 2
Both grades use standard
packing as follows:
0201
0402
0603, 0805,
1206, 1210
2010, 2512
20000/reel
10000/reel
5000/reel
4000/reel
Note 1: For zero ohm jumper chips use the dummy value & tolerance code R005J
Note 2: AEC-Q200 grade on resistor chips is not available in 0201 size.
USA (IRC) Part Number: WCR-WCR1206LF-1002FPLT (1206, 10 kilohms ±1%, Pb-free)
W
C
R
-
W
1
1
R
1
2
2
2
Family Model
WCR
C
WCR
0
6
L
3
F
1
0
4
0
2
5
F
6
P
L
T
7
3
4
5
6
7
Size
Termination
Value
Tolerance
Packing
0201
0402
0603
0805
1206
1210
2010
2512
LF = Pb-free
3 digits + multiplier
R = ohms for values
<100 ohms
F = ±1%
PLT = Paper Tape
0201
20000/reel
0402
10000/reel
0603, 0805,
5000/reel
1206, 1210
2010
4000/reel
ELT = Plastic Tape
2512
4000/reel
Note: For zero ohm jumper chips use value & tolerance code R000J
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
www.ttelectronicsresistors.com
© TT Electronics plc
04.16