© 2016 ROHM Co.,Ltd.
Simp le structure strong again st l ar g e
loads
Features
Applications
Automotive (i.e. EPS, battery monitoring
unit, HVA C)
Ideal for Current Detection in Large-Current Applications
High Power Ultra-Low-Ohmic Shunt Resistors
PSR Series
Convex design
Ultra-low resistances from 0.3mΩ
Industrial equipment
(e.g. power supplies for servers and
base stations, E SS)
Home appliances (AC, refrigerators)
Part No.
Resistance
(mΩ)
Size (mm)
L W H
PSR100
0.3
6.4 ± 0.3 3.2 ± 0.3 —
0.5
1
2
3
PSR400
0.3
10 ± 0.3 5.2 ± 0.3
1.85 ± 0.15
0.5 1.30 ± 0.15
1 0.90 ± 0.15
2 1.10 ± 0.15
3 0.90 ± 0.15
PSR500
0.2
15 ± 0.3 7.75 ± 0.3
1.85 ± 0.15
0.3 1.40 ± 0.15
0.4 1.15 ± 0.15
0.5 1.05 ± 0.15
1 1.30 ± 0.15
2 0.90 ± 0.15
Part No.
Size
(mm [inch])
Rated Power
(W)
Resistance
Tolerance
Resistance
Range
(mΩ)
Temperature
Coeffici ent of
Resistance
(ppm/℃)
Operating
Temperature Range
(℃)
PSR100
6.4 × 3.2
[2512]
3 F (±1%) 1 ±100
–55 to +170
PSR400
10 × 5.2
[3921]
4 F (±1%)
0.3, 0.5 ±175
1.0, 2.0, 3.0 ±75
PSR500
15 × 7.75
[5931]
5 F (±1%)
0.2 ±225
0.3, 0.4, 0.5 ±150
1.0, 2.0 ±75
PSR500 PSR100 PSR400
: Under Development TCR : PSR (+20℃ t o +125℃)
Convex shape and
precision welding
technology contribute to
increased power and
improved productivity
PSR500 PSR400
0.5mΩ 0.2mΩ 2.0mΩ 1.0mΩ 0.3mΩ 2.0mΩ
Ave.
Max.
Min.
-250
-200
-150
-100
-50
0
50
100
150
200
250
Temperat ure Coefficient of
Resistance (ppm/℃)
*+20℃ to +125℃
Minimal temperature-based resi stance
fluctuations = High-accuracy resistors
Resistive Metal
(Ni-Cr / Cu-Mn Alloy)
Electrode (Cu) Electrode (Cu)
Welds
Original Low Heat Generat ion St ructure Packages
Lineup Superior Temperature Coeff icient of Resistance