unr2-t221 Riedon Powertron, unr2-t221 Datasheet
unr2-t221
Manufacturer Part Number
unr2-t221
Description
Precisionfoilresistors
Manufacturer
Riedon Powertron
Datasheet
1.UNR2-T221.pdf
(3 pages)
Riedon Inc.
USR UNR 2-T220 / T220B / T221
USS UNS 2-T220
Precision Foil Resistors
Part Number - Resistance - Contact - Tolerance - TCR
UNR 2-T220B 5.7kOhms C 0.5% 3ppm
Type
Resistance Range
Power rating
Thermal Resistance Rthj-c
Tolerances
Stability
Shelf Life Stability
Temperature Coefficient
Voltage Proof
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
Notes
free air 70°C (R<50R0)
free air 70°C (R>50R0)
with heatsink (R<50R0)
with heatsink (R>50R0)
R<50R0
R>50R0
from 0.5 Ohms
from 10.0 Ohms
from 25.0 Ohms
from 50.0 Ohms
300 Cypress Avenue
0.1% / 0.25% / 0.5% / 1%
0.05% / 0.1% / 0.25% / 0.5% / 1%
0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
Ordering Information
SPECIFICATIONS
Alhambra CA 91801
www.riedon.com
•
•
•
•
•
•
•
0.5 Ohms to 150 kOhms
Resistances from 0.5Ohm to 150kOhms
Power Rating to 10Watt
Resistance Tolerances to ±0.01%
TCR to ±3ppm/K
Load Stability to 0.01%
TO-220 Housing
Convenient SMD D2Pak Available
USR / USS
10.8 K/W
18.8 K/W
1.5W
1.0W
Al
10W
6W
2
O
3
Epoxy + Cu heatsink nickel plated
max. ±5ppm/K (-55 to 155°C)
typ. ±3ppm/K (-55 to 125°C)
25ppm / ∆R after 1 year
50ppm / ∆R after 3 year
-55 to 155°C
< 0.1µV/K
Cu tinned
NiCr-Foil
1 kVDC
1.0 Nm
(626) 284-9901
0.01%
2
Specially designed for applications with fast
changing electrical load
0.5 Ohms to 5 kOhms
UNR /UNS
10.8 K/W
6.8 K/W
1.5W
1.0W
15W
10W
AlN
(626) 284-1704
Page 124
rev. 03/2006A
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unr2-t221 Summary of contents
Page 1
USR UNR 2-T220 / T220B / T221 USS UNS 2-T220 Precision Foil Resistors Type Resistance Range Power rating free air 70°C (R<50R0) free air 70°C (R>50R0) with heatsink (R<50R0) with heatsink (R>50R0) Thermal Resistance Rthj-c R<50R0 R>50R0 Tolerances from 0.5 Ohms from 10.0 Ohms from 25.0 Ohms from 50.0 Ohms Stability Shelf Life Stability Temperature Coefficient ...
Page 2
USR UNR 2-T220 / T220B / T221 USS UNS 2-T220 Precision Foil Resistors 800 600 -5ppm/K 400 200 0 -200 -400 -600 -800 -50 120 100 100 Temperature of the backplate(°C) USS 2-T220 / UNS 2-T220 Dimension mm (±mm) A 12.70 B 10.16 C 0.76 D 5.08 ...
Page 3
USR UNR 2-T220 / T220B / T221 USS UNS 2-T220 Precision Foil Resistors USR 2-T220B / UNR 2-T220B USR 2-T221 / UNR 2-T221 USR 2-T220 / UNR 2-T220 Riedon Inc. 300 Cypress Avenue SPECIFICATIONS (continued) Dimensions Dimension (C-Contact Dimension ...