Resistance
Low Resistance
al Element
Resistor
Metal Element
Resistor
Low Resistance
·Metal
Low TCR Element Resistor
· High stability over life
LOB Series
es
bility over life
· Tolerances from ±1% to ±5%
es from ±1% to ±5%
·LOB
Ultra
low resistance values (0.005 Ω to 0.1 Ω)
Series
resistance
values
(0.005 : to 0.1 :)
•·Low
TCR
Inherently non-inductive (≤.02 μh @ 0.5 MHz)
y non-inductive
(d.02
µh life
@ 0.5 MHz)
• High stability over
·
Available
in
1W,
3W, and 5W rated packages
• Tolerances
±1% packages
to ±5%
in 1W, 3W,
and 5Wfrom
rated
·• Ultra
Lead
RoHSvalues
compliant
available
lowfree
resistance
(0.005 : construction
to 0.1 :)
e RoHS compliant
available
• Inherently construction
non-inductive (d.02
µh @ 0.5 MHz)
• Available in 1W, 3W, and 5W rated packages
• Lead free RoHS compliant construction available
ION:
DESCRIPTION:
eries power
precision metal element resistors feature resistance values down to 0.005 with virtually no inductanc
The
LOBSeries
precision
metal
element resistors
feature
resistance
values
down to 0.005
withautomatic
virtually no inductance.
1, 3, and 5 watt
ratedpower
axial
leaded
packages,
these
resistors
are
compatible
with
insertion equipment
Available in 1, 3, and 5 watt rated axial leaded packages, these resistors are compatible with automatic insertion equipment.
IONS: APPLICATIONS:
• Switchmode and linear power supplies
ode and linear
power supplies
• Automotive current-sensing circuits
ve current-sensing
circuits
• Instrumentation
ntation • Regulators
rs
CONSTRUCTION:
The LOB:Series resistors feature tinned copper leads welded directly to a low-temperature coefficient resistance element in a
highly automated proprietary process. The leaded resistor elements are then encapsulated in a molding compound.
CTION:
Series resistors feature tinned copper leads welded directly to a low-temperature coefficient resistance element
Specifiprocess.
cationsThe leaded resistor elements are then encapsulated in a molding compound.
mated proprietary
Style
Continuous Power Dissipation
@ 25°C in free air (watts)
Overload Power
for 5 seconds (watts)
LOB-1
1
5
LOB-3
3
fications
Maximum Working
Voltage (volts)
15
Continuous Power Dissipation
LOB-5
5
@ 25°C
in free air (watts)
Overload Power
25 (watts)
for 5 seconds
Maximum Storage
Temperature (°C)
—1 x R
175
—3xR
175
Maximum Working
5xR
—
Voltage
(volts)
175
Maximum Storag
Temperature (°C
*Power Dissipation - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element temperature. Ambient
air temperature, velocity of cooling air, thermal resistance of heat, and the temperature of surrounding objects will affect this transfer, and must be taken into account when selecting a resistor.
1
Environmental
Testing
3
Test Parameters
MIL-STD 202
5
Load Life (2,000 hours)
Method 108
5
—1 x R
175
15
—3xR
175
MAX %'R *
25
±1%
—5xR
Unit
175
%'R
on - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element temperature.
velocity of cooling
air, thermal
resistance of heat, and the temperature
of surrounding objects will affect
into account when selecting a res
Thermal
Shock
Method 107
±1%this transfer, and must be taken
%'R
onmental Testing
Vibration
Method 204
±0.5%
%'R
Mechanical Shock
Method 213
±0.5%
%'R
t Parameters
Dielectric Strength
MIL-STD Method
202 301
±0.5% @1000 VAC
%'R
Method 302
Method 108
>1010@ 100
VDC
±1%
Ohms
Insulation Resistance
(2,000 hours)
Shock
MAX %'R *
Unit
%'R
*±0.0005 ohm allowance for test/contact error.
General Note
General
Note
Method 107
IRC reserves the right to make changes in product specification without notice or liability.
TT
electronics
reserves
theown
right
make
changes
in product
All information
is subject
to IRC’s
datato
and
is considered
accurate
at time ofspecification
going to print. without notice or liability.
Method 204
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
±1%
www.bitechnologies.com
±0.5%
Method 213
A subsidiary of
%'R
TT electronics plc
www.irctt.com www.welwyn-tt.com
LOB Series Issue December 2009 Sheet 1 of 3
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
© TT electronics plc
al Shock
%'R
±0.5%
10. 11
%'R
Low Resistance
Metal Element Resistor
High Voltage
Chip Resistors
HVC Series
Physical Data
connect
point
connect
point
C
d
D
l
L
Dimensions (Inches (mm))
Style
LOB-1
LOB-3
LOB-5
L
D
C
l
0.390 ± 0.010
(9.9 ± 0.3)
0.140 ± 0.008
1.31
1.50 ± 0.125
0.0305 ± 0.002
(3.6 ± 0.2)
(33.274)
(38.1 ± 3.2)
(0.813 ± 0.051)
0.560 ± 0.010
0.2100 ± 0.010
1.31
1.375 ± 0.125
0.0305 ± 0.002
(14.224 ± 0.254)
(5.334 ± 0.254)
(33.274)
(34.925 ± 3.175)
(0.813 ± 0.051)
0.920 ± 0.010
0.330 ± 0.010
1.670
1.250 ± 0.125
0.040 ± 0.002
(23.368 ± 0.254)
(8.382 ± 0.254)
(42.418)
(31.750 ± 3.175)
(1.016 ± 0.051)
TCR
(ppm/°C)
Temperature Coefficient of
Resistance vs. Resistance Value
Power Derating Percentage vs.
Free Air Ambient Temperature:
400
100
300
75
200
50
100
0
LOB-1
LOB-3
LOB-5
0
d
25
50
75
100
25
0
0
-3
Resistance (ohms x 10 )
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
25
50
75
100
125
150
175
Ambient Temperature (°C)
LOB Series Issue December 2009 Sheet 2 of 3
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
10. 11
Low Resistance
Metal Element Resistor
High Voltage
Chip Resistors
HVC Series
Ordering Data
To order, specify style, resistance value, tolerance, and package type as in the
following example:
Sample Part No.
LOB-3
R010
F
LF
LT
IRC Type
LOB-1 (1 watt)
LOB-3 (3 watt)
LOB-5 (5 watt)
Resistance Value
0.005:
0.02:
0.01:
0.025:
0.015:
0.03:
0.04:
0.05:
0.07:
0.08:
0.1:
Tolerance
J = 5%, H = 3%, F = 1%
Lead-Free RoHS Compliant
Packaging
LT = Lead Tape, 500 pcs. min.
LOB-1 = 3,500 pcs. max.
LOB-3 = 1,250 pcs. max.
LOB-5 = 800 pcs. max.
BLK = Bulk Pack, 500/box
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
LOB Series Issue December 2009 Sheet 3 of 3
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
10. 11