UNR2-T220 查看數據表（PDF） - Riedon Powertron

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UNR2-T220

Precision Foil Resistors

Riedon Powertron 

USR UNR 2-T220 / T220B / T221

USS UNS 2-T220

Precision Foil Resistors

• 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

SPECIFICATIONS

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

Voltage Proof

Thermal EMF

Operating Temperature Range

Resistor Material

Substrate

Housing

Connector Material

Terminals

Max. Torque

Notes

USR / USS

0.5 Ohms to 150 kOhms

UNR /UNS

0.5 Ohms to 5 kOhms

1.5W

1.0W

10W

6W

1.5W

1.0W

15W

10W

10.8 K/W

18.8 K/W

6.8 K/W

10.8 K/W

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%

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)

1 kVDC

< 0.1µV/K

-55 to 155°C

NiCr-Foil

Al2O3

AlN

Epoxy + Cu heatsink nickel plated

Cu tinned

2

1.0 Nm

Specially designed for applications with fast

changing electrical load

Ordering Information

Part Description: Part Type - Resistance - Contact - Tolerance - TCR

Example: UNR 2-T220B 5.7kOhms C 0.5% 3ppm

Riedon Inc.

300 Cypress Avenue Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

06/13

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