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
Size
Tolerance
F, G, J, K
1206
2010
2512
1
2
Resistance
Range
1
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
TCR
2
(ppm/°C)
Power
Rating
at 70°C
(Watts)
0.5
Dielectric
Withstanding
Voltage (V)
Maximum
Current
(Amps)
Operating
Temperature
Pad and Trace Area
for Max Power
Rating @ 70°C
16
200
22
32
-55°C to +150°C
30mm
2
100mm
2
300mm
2
±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 June 2010
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, -55°C +150°C, 100 cycles
6.25X Rated Power for 5 seconds (1206, 2010 Size)
5X Rated Power for 5 seconds (2512 Size)
100 hours @150°C
MIL-STD-202, Method 301
2.5X Rated Voltage, 1 minute
MIL-STD-202 Method 106
1000 hours, Rated Power, 70°C
1.5 hours on, 30 minutes off
1 hour -65°C followed by rated power for 45 min
MIL-STD-202 Method 210
260°C, 10 seconds
MIL-STD-202 Method 302
100VDC, 1 minute
MIL-STD-202 Method 208
245°C, 5 seconds
Typical Performance
±0.5% + 1.0mΩ
±0.5% + 0.5mΩ
±0.5% + 0.5mΩ
±0.25% + 0.5mΩ
±0.5% + 0.5mΩ
±1.0% + 0.5mΩ
±0.5% + 0.5mΩ
±0.5% + 1.0mΩ
>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 w
atts
LRC 20
10 1 w
att
LRC 12
06 0.5
watts
Average power
dissipationnot to
exceed normal
70°C rating
10
10
7
5
3
25°
70°
150°
Temperature in °C
300 µSec
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 > 0.025Ω
LRF for values
≤
0.025Ω
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 = 0.050Ω; 1R00 = 1Ω
Tolerance Code
F = ±1%, G = ±2%, J = ±5%, K = ±10%
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 June 2010
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