USR UNR 4-T220 / T220B
USS UNS 4-T220
Precision Shunt Resistors
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Resistances from 0.2Ohm to 80Ohms
Power Rating to 15Watt
Resistance Tolerances to ±0.01%
TCR to ±1ppm/K
Load Stability to 0.01%
SPECIFICATIONS
Type
Resistance Range
Power rating
free air 70°C
with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0.5 Ohms
from 10.0 Ohms
from 50.0 Ohms
Stability
Shelf Life Stability
Temperature Coefficient
1.5W
10W
10.8 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)
1 kVDC
< 0.1µV/K
-55 to 155°C
NiCr-Foil
Al
2
O
3
Epoxy + Cu heatsink nickel plated
Cu tinned
4
1.0 Nm
Specially designed for applications with fast
changing electrical load
AlN
USR / USS
0.2 to 80 Ohms
UNR /UNS
1.5W
15W
6.8 K/W
Voltage Proof
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
Notes
Ordering Information
Part Number - Resistance - Contact - Tolerance - TCR
UNR 2-T220B 5.7kOhms C 0.5% 3ppm
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
Page 132
rev. 03/2006A
RIEDON [ RIEDON POWERTRON ]
