UT Series
Powertron
FEATURES
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•
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•
•
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Resistances from 0.02 to 320kOhms
Power Rating 0.1 to 13Watts
Resistance Tolerances to ± 0.01%
Low TCR: ± 20ppm/K Standard
MIL-R-26 / MIL-R-39007 Power Ratings
Temperature Range: -55°C to +350°C (V)
Non-Inductive Windings Available
TABLE 1—SPECIFICATIONS
Tolerances
Temperature Coefficient
±0.01% to ±10% ( 1% Standard )
>10W : ±20ppm/K
1W to10W : ±50ppm/K
<1W : 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
Temperature Range
Dielectric Strength
Constuction
Environmental Performance
(MIL-STD 202)
DR
Characteristic U
±0.2% + 0.05W
±1% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
±0.1% + 0.05W
±0.1% + 0.05W
Characteristic V
±0.2% + 0.05W
±3% + 0.05W
±2% + 0.05W
±2% + 0.05W
±2% + 0.05W
±2% + 0.05W
±0.2% + 0.05W
±0.2% + 0.05W
Dielectric
Load Life
Storage
Moisture Resistance
Thermal Shock
5X Overload ( 5s )
Shock
Vibration
FIGURE 1—DERATING
120
100
Power (%)
80
60
40
20
0
0
25
50
100 150 200 275
Ambient Temperature (°C)
300
350
Char V
Char U
ORDERING INFORMATION
Part Number - Resistance - Tolerance - TCR ( If not standard )
UT-5 25kOhms 0.1%
For Non-Inductive Windings / insert the letter “N” ( i.e. UTN-5 )
Document No.: 64327
Revision: 23-05-2013
For technical questions,
contact
powertron@vishaypg.com
www.powertron.de
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Document No.: 63999
Revision: 15-Jul-2014
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