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Low Value Current Sense Flat Chip Resistor
LR Series * Resistance range from 0.002 up to 1 * Standard Sn/Pb and Pb lead-free terminations available * High power dissipation at 70C * Tolerances to 1%
Electrical Data
Size Tolerance F, G, J, K 1206 2010 2512
1 2
Resistance Range1 Tolerance J, K Tolerance K 0.003 to 1W 0.010 to 1W 0.003 to 1W 0.002 to 1W 0.002 to 1W
TCR2 (ppm/C)
Power Rating at 70C (Watts) 0.5
Dielectric Withstanding Voltage (V)
Maximum Current (Amps)
Operating Temperature
Pad and Trace Area for Max Power Rating @ 70C
16 200 22 32 -55C to +150C
30mm2 100mm2 300mm2
100
1.0 2.0
Non-standard resistance values available Contact factory for TCR information on values under 0.05ohms
Outline Dimensions
D L W
Solder Plating Ni Barrier Layer
H
Protective Overcoat Cu Wraparound Termination
E
Cu Termination
Alumina Substrate
1206 in. L W H D E 0.126 0.012 0.064 0.008 0.024 0.004 0.019 0.010 0.019 0.010 mm 3.20 0.305 1.63 0.203 0.61 0.102 0.48 0.25 0.48 0.25 in. 0.206 0.015 0.104 0.010 0.029 0.004 0.019 0.010 0.019 0.010
2010 mm 5.23 0.38 2.64 0.25 0.74 0.1 0.48 0.25 0.48 0.25 in. 0.256 0.015 0.128 .010 0.029 0.004 0.019 0.010 0.019 0.010
2512 mm. 6.50 0.38 3.25 0.25 0.74 0.1 0.48 0.25 0.48 0.25
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
A subsidiary of TT electronics plc LR Series Issue May 2009
Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Email: afdsales@irctt.com * Website: www.irctt.com
Low Value Current Sense Flat Chip Resistor
Environmental Performance
Environmental Test Thermal Shock Short Time Overload High Temperature Exposure Dielectric Withstanding Voltage Moisture Resistance Load Life Low Temperature Operation Resistance to Solder Heat Insulation Resistance Solderability Test Method MIL-STD-202 Method 107G Condition B, -55C +150C, 100 cycles 6.25X Rated Power for 5 seconds 100 hours @150C MIL-STD-202, Method 301 2.5X Rated Voltage, 1 minute MIL-STD-202 Method 106 1000 hours, Rated Power, 70C 1.5 hours on, 30 minutes off 1 hour -65C followed by rated power for 45 min MIL-STD-202 Method 210 260C, 10 seconds MIL-STD-202 Method 302 100VDC, 1 minute MIL-STD-202 Method 208 245C, 5 seconds Typical Performance 0.5% + 1.0m 0.5% + 0.5m 0.5% + 0.5m 0.25% + 0.5m 0.5% + 0.5m 1.0% + 0.5m 0.5% + 0.5m 0.5% + 1.0m >1000 megohms 95% min Coverage
Power Derating and Pulse/Surge Capability
Power Derating Curve
100
Pulse and Surge Capability
Surge Power Watts
70 50 30 20
% Of Rated Power
50
LRC 25 12 2 wa tts LRC 20 10 1 wa tt LRC 12 06 0.5 watts
Average power dissipationnot to exceed normal 70C rating
10
10 7 5 3
25
70
150
Temperature in C
300 Sec
1 mSec
3 mSec
10 mSec
30 mSec
100 mSec
300 mSec
1 Sec
Surge or Repetitive Pulse Duration
Ordering Procedure
Prefix Model
LR for values > 0.025 LRF for values 0.025
Recommended Solder Pad Layout
A
LRC - LRF 1206LF - 01 - R020 - F
B C
Size
1206; 1206LF; 2010; 2010LF; 2512; 2512LF (LF=Lead Free Terminations)
TCR Code
01 = 100ppm/C
DIM. A in. mm in. mm in. mm
LR1206 0.080 (2.0) 0.160 (4.0) 0.050 (1.25)
LR2010 0.120 (3.05) 0.255 (6.5) 0.060 (1.5)
LR2512 0.145 (3.7) 0.305 (7.75) 0.060 (1.5)
Resistance Code
4-Digit resistance code. Ex: R050 = 0.050; 1R00 = 1
Tolerance Code
F = 1%, G = 2%, J = 5%
B
C
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 * Email: afdsales@irctt.com * Website: www.irctt.com
LR Series Issue May 2009

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