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UT Series
Silicone Coated Power Resistors
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Resistances from 0.02 to 260kOhms
Excellent Pulse Handling
High Temperature: -55°C to +350°C (“V” Rating )
Power Rating 0.1 to 13Watts
Resistance Tolerances to ± 0.01%
Low TCR: ± 20ppm/K Standard
MIL-R-26 / MIL-R-39007 Power Ratings
Non-Inductive Windings Available
SPECIFICATIONS
Specification
Tolerances
Temperature Coefficient
Temperature Range
Dielectric Strength
Constuction
Value
±0.01% to ±10% ( 1% Standard )
>10 W : ±20ppm/K
1 W to10 W : ±50ppm/K
<1 W : Call Factory
-55°C to +275°C : Characteristic U
-55°C to +350°C : Characteristic V
500 VAC : UT-1 / UT-1/2A / UT-1/2 / UT-1A
1000 VAC : All Others
Centerless ground ceramic core
Tinned copper or copperweld leads
High temperature / trivalent / inorganic Silicone coating
All welded terminations
Environmental Performance
(MIL-STD 202)
Dielectric
Load Life
Storage
Moisture Resistance
Thermal Shock
5X Overload ( 5s )
Shock
Vibration
Characteristic U
±0.2% + 0.05 W
±1% + 0.05 W
±0.2% + 0.05 W
±0.2% + 0.05 W
±0.2% + 0.05 W
±0.2% + 0.05 W
±0.1% + 0.05 W
±0.1% + 0.05 W
D R
Characteristic V
±0.2% + 0.05 W
±3% + 0.05 W
±2% + 0.05 W
±2% + 0.05 W
±2% + 0.05 W
±2% + 0.05 W
±0.2% + 0.05 W
±0.2% + 0.05 W
Power Derating Curve
120
100
80
CH
60
40
AR
CH
U
AR
V
20
0
0
50
100
150
200
250
300
350
400
Ordering Information
Ambient Temperature (°C)
For Non-Inductive Windings / insert the letter “N” ( i.e. UTN-5 )
Part Description: Part Type - Resistance - Tolerance - TCR ( If not standard )
Example: UT-5 25 kOhms 0.1%
Riedon Inc.
12/13
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
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