IRC TT LRC-LRF3WLF-01-R020-F Low range 3 watt smt chip resistor Datasheet

Low Range 3 Watt
SMT Chip Resistor
LRF3W Series
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•
•
•
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Tolerances to ±1%
3 Watt @70°C power dissipation in a compact 1225 package
Resistance range from 0.002 to 0.100Ω
Ideal for high current sensing applications
Standard Sn/Pb and Pb-free (matte tin) terminations available
IRC’s LRF3W series combines high power capabilities with small chip
size and very low resistance to handle your current sensing needs.
The LRF3W utilizes IRC’s proprietary thick film materials which possess superior thermal conductivity over
other technologies. The result is significantly lower operating temperature and higher power dissipation.
Termination on the long sides minimizes TCE mismatch to PCBs.
Electrical Data
Resistance
Range(Ω)
Absolute
TCR
(ppm/°C)
Available Absolute
Tolerances
0.002 - 0.004
±550
±5%, ±10%
Rated
Power @
70° (W)
3.0*
0.005 - 0.100
±100
Voltage
Rating
(V)
√P x R
±1%, ±2%, ±5%, ±10%
Operating
Temperature
Range
Termination
-55°C to +150°C
Sn/Pb solder or matte tin
plated over nickel
*Note: 3-Watt rating achieved with 500mm2 Copper pad area around each termination pad. Maximum current is 25 amps.
Environmental Data
Environmental Test
Test Method
Performance (Resistance Change)
Thermal Shock
MIL-STD-202 Method 107
Condition F, -65°C to +150°C
±0.25% (+0.001W)
Short-time Overload
5 Seconds, 2 X Rated Power
Maximum 25 Amps
±0.5% (+0.0005W)
High Temperature Exposure
MIL-PRF-55342
100 Hours, 150°C, No Power
±0.5% (+0.0005W)
1000 Hours, 70°C, Rated Power
±1.0% (+0.0005W)
MIL-STD-202 Method 106
No Bias
±0.5% (+0.0005W)
MIL-PRF-55342
±0.25% (+0.0005W)
MIL-STD-202 Method 210
±0.25% (+0.001W)
Molten Solder 250°C
90 seconds minimum
Load Life
Moisture Resistance
Low Temperature Operation
Resistance To Solder Heat
Leach Resistance
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
LRF3W Series Issue July 2008
Low Range 3 Watt
SMT Chip Resistor
Temperature Rise Data
Pulse Power Data
Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
LRF3W Series Issue July 2008
Low Range 3 Watt
SMT Chip Resistor
Physical Data
Power Derating Curve
Ordering Data
Prefix
LRC
-
LRF3WLF
- 01
-
R020
-
F
Model
LRF3W = 3 watt chip with standard Sn/Pb termination
LRF3WLF = 3 watt chip with Pb-free (matte tin) termination
TCR Code
Resistance Code
4-Digit resistance code
Example: R050 = 0.050Ω; R005 = 0.005Ω
Tolerance Code
K = ±10%; J = ±5%; G = ±2%; F = ±1%
For additional information or to discuss your specific requirements,
please contact our Applications Team using the contact details below.
Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
LRF3W Series Issue July 2008
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