Riedon Inc.

300 Cypress Avenue

Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

05/16

UAL Series

Specification

Value

Tolerances

±0.01% to ±10% ( 1% Standard )

Temperature Coefficient

>10Ω : ±20ppm/K

1Ω to10Ω : ±50ppm/K

<1Ω : Call Factory

Temperature Range

-55°C to +275°C

Dielectric Strength

UAL-5,10: 1500 VAC ; UAL-25: 2500 VAC ; UAL-50: 3500VAC ; Others: 5500VAC

Constuction

Centerless ground ceramic core

Tinned copper or copperweld leads

High-temperature epoxy molding Compound

Anodized aluminum housing

All welded terminations

Environmental Performance

(MIL-STD 202)

∆R

Dielectric

±0.2% + 0.05Ω

Load Life

±1% + 0.05Ω

Storage

±0.2% + 0.05Ω

Moisture Resistance

±0.2% + 0.05Ω

Thermal Shock

±0.2% + 0.05Ω

5X Overload ( 5s )

±0.2% + 0.05Ω

Shock

±0.1% + 0.05Ω

Vibration

±0.1% + 0.05Ω

Optional Lead Configuation

Wire, Flexible, Teflon, Quick Disconnect, Flying Leads, Formed

Aluminum Housed Power Wirewound Resistors

Power Derating Curve

Free-air Derating

A : UAL-5, UAL-10

B : UAL-25

C : UAL-50, UAL-100, UAL-250

D : UAL-300

0

50

100

150

200

250

300

350

0

20

40

60

80

100

120

Ambient Temperature (°C)

Mo

un

te

d

on

He

ats

ink

A

B

C

D

*Call factory for quote