USR4-3425 Datasheet, PDF (1/3 Pages) Willow Technologies Ltd – High Stability Near Temperature Independency

USR UNR 4-3425 3825 3825H 4020
Precision Shunt Resistors
Type
Resistance Range
Power rating
free air 70°C
for 3825H
with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0.05 Ohms
from 10.0 Ohms
from 50.0 Ohms
Stability
Shelf Life Stability
Temperature Coefficient
Voltage Proof
max. Current
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
Notes
• Resistances from 0.05Ohm to 500Ohms
• Power Rating to 50Watt
• Resistance Tolerances to ±0.01%
• TCR to ±1ppm/K
• Load Stability to 0.01%
SPECIFICATIONS
USR 4-
3425 3825
USR 4-
4020
UNR 4-
3425 3825
UNR 4-
4020
0.05 to 500 Ohms
0.05 to 400 Ohms
other resistance values upon request / power rating depending on resistance value
3W
5W
30 W
3.5 K/W
2.5 W
30 W
3.6 K/W
3W
5W
50 W
2.1 K/W
2.5 W
50 W
2.2 K/W
0.1% / 0.25% / 0.5% / 1%
0.05% / 0.1% / 0.25% / 0.5% / 1%
0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
0.01%
25ppm / ∆R after 1 year
50ppm / ∆R after 3 year
max. ±5ppm/K (-55 to 155°C)
typ. ±3ppm/K (-55 to 125°C)
upon request ±1ppm/K (0 to 60°C)
750 VDC
15 A
< 0.1µV/K
-55 to 155°C
NiCr-Foil
Al₂O₃
AlN
Epoxy + Al-heatsink
Cu tinned
4
1.0 Nm
Specially designed for applications with fast
changing electrical load
Ordering Information
Part Number - Resistance - Contact - Tolerance - TCR
USR 4-3825H 10Ohms D 0.5% 3ppm
Powertron GmbH Potsdamer Strasse 18a D-14513 Teltow [phone]
A Riedon Company
www.powertron.de
[phone]
Page 127
rev. 03/2006A