USR4-3425_13 Datasheet, PDF (1/3 Pages) Riedon Powertron – Precision Shunt Resistors

USR UNR 4-3425 4020
Precision Shunt Resistors
Type
Resistance Range
Power rating
free air 70°C
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%
• Backplate Isolated from Leads
SPECIFICATIONS
USR 4-
3425
USR 4-
4020
UNR 4-
3425
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
30 W
3.5 K/W
2.5 W
30 W
3.6 K/W
3W
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 (25°C 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 Description: Part Type - Resistance - Contact - Tolerance - TCR
Example: USR 4-3425 10Ohms D 0.5% 3ppm
Riedon Inc.
300 Cypress Avenue Alhambra CA 91801
[phone]
[phone]
www.riedon.com
06/13