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. A subsidiary of
TT electronics plc
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 June 2010
Low Value Current Sense
Flat Chip Resistor
LR Series
• Resistance range from 0.002Ω up to 1Ω
• Standard Sn/Pb and Pb lead-free terminations available
• High power dissipation at 70°C
• Tolerances to ±1%
Electrical Data
Outline Dimensions
602101022152
.nimm.nimm.ni.mm
L210.0±621.0503.0±02.3510.0±602.083.0±32.5510.0±652.083.0±05.6
W800.0±460.0302.0±36.1010.0±401.052.0±46.2010.±821.052.0±52.3
H400.0±420.0201.0±16.0400.0±920.01.0±47.0400.0±920.01.0±47.0
D010.0±910.052.0±84.0010.0±910.052.0±84.0010.0±910.052.0±84.0
E010.0±910.052.0±84.0010.0±910.052.0±84.0010.0±910.052.0±84.0
H
D
L
Protective Overcoat
Cu Termination
Solder Plating
Ni Barrier Layer
Cu Wraparound
Termination
Alumina Substrate
W
E
Size
Resistance
Range1TCR2
(ppm/°C)
Power
Rating
at 70°C
(Watts)
Dielectric
Withstanding
Voltage (V)
Maximum
Current
(Amps)
Operating
Temperature
Pad and Trace Area
for Max Power
Rating @ 70°C
Tolerance
F, G, J, K
Tolerance
J, K
Tolerance
K
1206
0.010 to 1W0.003 to 1W
0.003 to 1W
±100
0.5
200
16
-55°C to +150°C
30mm2
2010 0.002 to 1W1.0 22 100mm2
2512 0.002 to 1W2.0 32 300mm2
1 Non-standard resistance values available
2 Contact factory for TCR information on values under 0.05ohms
LR Series Issue June 2010
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
Low Value Current Sense
Flat Chip Resistor
Environmental Performance
Prefix LRC - LRF 1206LF - 01 - R020 - F
Model
LR for values > 0.025Ω
LRF for values ≤ 0.025Ω
Size
1206; 1206LF; 2010; 2010LF; 2512; 2512LF
(LF=Lead Free Terminations)
TCR Code
01 = ±100ppm/°C
Resistance Code
4-Digit resistance code. Ex: R050 = 0.050Ω; 1R00 = 1Ω
Tolerance Code
F = ±1%, G = ±2%, J = ±5%, K = ±10%
For additional information or to discuss your specific requirements,
please contact our Applications Team using the contact details below.
Pulse and Surge Capability
Average power
dissipationnot to
exceed normal
70°C rating
Surge or Repetitive Pulse Duration
300 µSec 1 mSec 3 mSec 10 mSec 30 mSec 100 mSec 300 mSec 1 Sec
70
50
30
20
10
7
5
3
Surge Power Watts
LRC 2512 2 watts
LRC 2010 1 watt
LRC 1206 0.5 watts
Power Derating Curve
Power Derating and Pulse/Surge Capability
Ordering Procedure Recommended Solder Pad Layout
A
B
C
.MID6021RL0102RL2152RL
A
.ni080.0021.0541.0
mm)0.2()50.3()7.3(
B
.ni061.0552.0503.0
mm)0.4()5.6()57.7(
C.ni050.0060.0060.0
mm)52.1()5.1()5.1(
25° 70° 150°
100
50
10
% Of Rated Power
Temperature in °C
Environmental Test Test Method Typical Performance
Thermal Shock MIL-STD-202 Method 107G
Condition B, -55°C +150°C, 100 cycles ±0.5% + 1.0mΩ
Short Time Overload 6.25X Rated Power for 5 seconds (1206, 2010 Size)
5X Rated Power for 5 seconds (2512 Size) ±0.5% + 0.5mΩ
High Temperature Exposure 100 hours @150°C ±0.5% + 0.5mΩ
Dielectric Withstanding Voltage MIL-STD-202, Method 301
2.5X Rated Voltage, 1 minute ±0.25% + 0.5mΩ
Moisture Resistance MIL-STD-202 Method 106 ±0.5% + 0.5mΩ
Load Life 1000 hours, Rated Power, 70°C
1.5 hours on, 30 minutes off ±1.0% + 0.5mΩ
Low Temperature Operation 1 hour -65°C followed by rated power for 45 min ±0.5% + 0.5mΩ
Resistance to Solder Heat MIL-STD-202 Method 210
260°C, 10 seconds ±0.5% + 1.0mΩ
Insulation Resistance MIL-STD-202 Method 302
100VDC, 1 minute >1000 megohms
Solderability MIL-STD-202 Method 208
245°C, 5 seconds 95% min Coverage