Riedon Inc.

300 Cypress Avenue

Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

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For Non-Inductive Windings / insert the letter “N” ( i.e. UBN-5 )

Part Description: Part Type - Resistance - Tolerance - TCR ( If not standard )

Example: UB-3 10 Ohm 1%

0

-50

0

50

100

150

200

250

300

0

20

40

60

80

100

120

Ambient Temperature (°C)

Power Derating Curve

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 +250°C

Dielectric Strength

500 VAC : UB-1 / UB-2 / UB-3

1000 VAC : All Others

Construction

Centerless ground ceramic core

Tinned copper or copperweld leads

High temperature / trivalent / inorganic Silicone coating

All welded terminations

Environmental Performance

(MIL-STD 202)

∆R

Dielectric

±0.2% + 0.05Ω

Load Life

To ±1% Depending on Size and Resistance Value

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

UB Series

Silicone Coated Power Resistors

Ordering Information