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Precision Shunt Resistor

USR UNR 4-3425 4020

Precision Shunt Resistor

pdf
FNR4-T227.jpg
  • Resistances from 0.05 Ohm to 650 Ohms
  • Power Rating to 50 Watts
  • Resistance Tolerances to ±0.01%
  • TCR to ±1ppm/K
  • Load Stability to 0.01%
  • Backplate Isolated from Leads
Type USR 4-3425  USR 4-4020 UNR 4-3425  UNR 4-4020
Resistance Range1 0.05 to 650 Ohms 0.05 to 100 Ohms
Power Rating
free air 70°C
with heatsink

3W
30W

2.5W
30W

3W
50W

2.5W
50W
Thermal Resistance Rthj-c 3.5 K/W 3.6 K/W 2.1 K/W 2.2 K/W
Tolerances
from 0.05 Ohms
from 10.0 Ohms
from 50.0 Ohms

0.1% / 0.25% / 0.5% / 1%
0.05% / 0.1% / 0.25% / 1%
0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
Stability 0.01%
Shelf Life Stability 25ppm / ΔR after 1 year
50ppm / ΔR after 3 year
Temperature Coefficient max. ±5ppm/K (-55 to 155°C)
typ. ±3ppm/K (-55 to 155°C)
upon request ±1ppm/K (25°C to 60°C)
Voltage Proof 750 VDC
Thermal EMF < 1 µV/°K
Operating Temperature Range -55°C to 155°C
Resistor Material NiCr-Foil
Substrate Al2O3 AlN
Housing Epoxy + Al-heatsink
Connector Material Cu tinned
Max. Torque 1.0 Nm

1other resistance values upon request / power rating depending on resistance value

 

pdf See PDF Datasheet for Full Specifications

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