UB Series
Silicone Coated Power Resistors
SPECIFICATIONS (continued)
Specification
Value
Tolerances
±0.01% to ±10% ( 1% Standard )
Temperature Coefficient
>10W : ±20ppm/K
1W to10W : ±50ppm/K
<1W : Call Factory
Temperature Range
Dielectric Strength
-55°C to +250°C
500 VAC : UB-1 / UB-2 / UB-3
1000 VAC : All Others
Construction
Centerless ground ceramic core
Matte Tin over Copper
Flame resistant / High temperature / trivalent / inorganic Silicone coating
All welded terminations
Environmental Performance
DR
(MIL-STD 202)
Dielectric
±0.2% + 0.05W
To ±1% Depending on Size and Resistance Value
±0.2% + 0.05W
Load Life
Storage
Moisture Resistance
Thermal Shock
5X Overload ( 5s )
Shock
±0.2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.1% + 0.05W
Vibration
±0.1% + 0.05W
Power Derating Curve
120
100
80
60
40
20
0
0
-50
0
50
100
150
200
250
300
Ambient Temperature (°C)
Ordering Information
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%
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
© Riedon, Inc.
www.riedon.com
sales@riedon.com
Revised: 201807_001
RIEDON [ RIEDON POWERTRON ]
