LRC-LRF3W-01-R020-F Datasheet, PDF (1/3 Pages) IRC - a TT electronics Company. – Low Range 3 Watt SMT Chip Resistor

Low Range 3 Watt
SMT Chip Resistor
LRF3W Series
• 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
Rated
Power @
70° (W)
Voltage
Rating
(V)
Operating
Temperature
Range
Termination
0.002 - 0.004 ±550
±5%, ±10%
3.0*
0.005 - 0.100 ±100 ±1%, ±2%, ±5%, ±10%
√^{P x R}
-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
Thermal Shock
Short-time Overload
High Temperature Exposure
MIL-STD-202 Method 107
Condition F, -65°C to +150°C
5 Seconds, 2 X Rated Power
Maximum 25 Amps
MIL-PRF-55342
100 Hours, 150°C, No Power
Load Life
1000 Hours, 70°C, Rated Power
Moisture Resistance
MIL-STD-202 Method 106
No Bias
Low Temperature Operation
MIL-PRF-55342
Performance (Resistance Change)
±0.25% (+0.001W)
±0.5% (+0.0005W)
±0.5% (+0.0005W)
±1.0% (+0.0005W)
±0.5% (+0.0005W)
±0.25% (+0.0005W)
Resistance To Solder Heat
MIL-STD-202 Method 210
±0.25% (+0.001W)
Leach Resistance
Molten Solder 250°C
90 seconds minimum
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: [phone] • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
LRF3W Series Issue July 2008