Low Value Current Sense
Flat Chip Resistor
Low Value Current Sense
LR Series
Low Value
Resistor
Sense
Current
Flat Chip
from 0.002Ω up to 1Ω
·
Resistance range
Resistor
Flat Chip
and Pb lead-free
·
Standard Sn/Pb
terminations available
LR
High power dissipation at 70°C
Series
Tolerances to
from 0.002 up to 1
LR Series
Resistance range
±1%
·
·
Resistance range
and Pb lead-free terminations available
Standard Sn/Pb
from 0.002 up to 1
Standard Sn/Pb and Pb lead-free terminations available
High power dissipation at 70°C
High power dissipation at 70°C
Tolerances to ±1%
Tolerances to ±1%
Electrical Data
Electrical Data
Size
Size
Resistance
Range
1
Resistance
Range
1
Tolerance
Tolerance
F, G, J, K
F, G, J, K
Power
Pad and Trace Area
Dielectric
Maximum
TCR
2
Power
Rating
Operating
Pad and
for Max Power
Trace Area
Dielectric
Maximum
Withstanding
Current
TCR
2
Operating
Temperature
for Max Power
(ppm/°C)
Rating
at 70°C
Withstanding
(V)
Current
Voltage
(Amps)
Temperature
Rating @ 70°C
Tolerance
Tolerance
(ppm/°C) at 70°C
(Watts)
Voltage (V)
(Amps)
Rating @ 70°C
Tolerance
Tolerance
J, K
K
(Watts)
J, K
K
0.003 to 1
0.003 to 1
0.003 to 1
0.002 to 1
0.003 to 1
0.002 to 1
0.002 to 1
0.002 to 1
±100
±100
0.5
0.5
1.0
1.0
2.0
2.0
200
200
16
22
32
1206
1206
2010 0.010 to 1
2010 0.010 to 1
2512
2512
1
1
2
2
16
22
32
-55°C to +150°C
-55°C to +150°C
30mm
2
30mm
2
100mm
2
100mm
2
300mm
2
300mm
2
Non-standard resistance values available
Non-standard resistance values available
Contact factory for TCR information on values under 0.05ohms
Contact factory for TCR information on values under 0.05ohms
Outline Dimensions
Outline Dimensions
D
D
L
L
W
W
Solder Plating
Solder Plating
Ni Barrier
Ni Barrier Layer
Layer
H
H
Protective Overcoat
Protective Overcoat
Cu Wraparound
Cu Wraparound
Termination
Termination
E
E
Cu Termination
Cu Termination
Alumina Substrate
Alumina Substrate
1206
06
12
in
i
.
n.
L
L
W
W
H
H
D
D
E
E
0.126 ± 0.012
0.126 ± 0.012
0.064 ± 0.008
0.064 ± 0.008
0.024 ± 0.004
0.024 ± 0.004
0.019 ± 0.010
0.019 ± 0.010
0.019 ± 0.010
0.019 ± 0.010
mm
m
m
3.20 ± 0.305
3.20 ± 0.305
1.63 ± 0.203
1.63 ± 0.203
0.61 ± 0.102
0.61 ± 0.102
0.48 ± 0.25
0.48 ± 0.25
0.48 ± 0.25
0.48 ± 0.25
in.
in.
201
2010
0
mm
mm
5.23 ± 0.38
5.23 ± 0.38
2.64 ± 0.25
2.64 ± 0.25
0.74 ± 0.1
0.74 ± 0.1
0.48 ± 0.25
0.48 ± 0.25
0.48 ± 0.25
0.48 ± 0.25
in.
2512
2512
in.
mm.
mm.
0.206 ± 0.015
0.206 ± 0.015
0.104 ± 0.010
0.104 ± 0.010
0.029 ± 0.004
0.029 ± 0.004
0.019 ± 0.010
0.019 ± 0.010
0.019 ± 0.010
0.019 ± 0.010
0.256 ± 0.015
6.50 ± 0.38
0.256 ± 0.015
6.50 ± 0.38
0.128 ± .010
0.128 ± .010
0.029 ± 0.004
0.029 ± 0.004
3.25 ± 0.25
3.25 ± 0.25
0.74 ± 0.1
0.74 ± 0.1
0.019 ± 0.010
0.48 ± 0.25
0.019 ± 0.010
0.48 ± 0.25
0.019 ± 0.010
0.48 ± 0.25
0.019 ± 0.010
0.48 ± 0.25
General Note
General Note
IRC
electronics reserves
make
right to make changes in product specification
liability.
notice or liability.
TT
reserves
Note
to
the
changes in product specification without notice or
without
General
the right
All information is
right to
to IRC’s own data
product specification without notice
going to print.
IRC reserves the
subject
make changes in
and is considered accurate at time of
or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
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 •
Street • Corpus Christi Texas 78411
www.irctt.com
Advanced Film Division
© TT electronics plc
• 4222 South Staples
Email: afdsales@irctt.com • Website:
USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Email: afdsales@irctt.com • Website: www.irctt.com
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
TT electronics plc
A subsidiary of
A subsidiary of
LR Series Issue June
electronics plc
TT
2010
LR Series Issue June 2010
9.12
Low Value Current Sense
Flat Chip Resistor
Low Value Current Sense
LR Series
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% + 1.0m
±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 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 > 0.025
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%, 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
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
9.12
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