USL Series
Powertron
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UAL-25-4T
UAL-25-4
Power Rating 5 to 300Watts
All Welded Construction
Resistances from 0.005 to 250kOhms
Tolerance to ±0.01%
High Overload and Pulse Handling
Low TCR: ± 20ppm/K Standard
Four Terminal Versions Available
UAL-25-4TR
SPECIFICATIONS
Type
MIL-R-39009
MIL-R-18546
Style
Commercial
MIL
Free Air
UAL-5
RER-60 / RE-60
7.5 a
5a
4.5
0.01 to 22K
UAL-10
RER-65 / RE-65
12.5 a
10 a
7.5
0.01 to 47K
UAL-25
RER-70 / RE-70
25 b
20 b
12
0.01 to 90K
UAL-50
RER-75 / RE-75
50 c
30 c
20
0.01 to 250K
UAL-100
RER-77 / RE-77
100 d
75 d
40
0.01 to 50K
UAL-180
-
180 d
-
-
0.01 to 50K
UAL-250
RER-80 / RE-80
250 d
120 d
100
0.01 to 50K
UAL-300
-
300 e
-
75
0.005 to 100K
Power Rating ( W @ 25°C )
Resistance
Range1
1
For non-inductive windings, divide maximum resistance by 2
Heatsink Required : 0.040 [1.0] Alum. Plate, 129 in2 [832 cm2] or equiv.
b
Heatsink Required : 0.040 [1.0] Alum. Plate, 167 in2 [1077 cm2] or equiv.
c
Heatsink Required : 0.059 [1.5] Alum. Plate, 291 in2 [1877 cm2] or equiv.
d
Heatsink Required : 0.125 [3.2] Alum. Plate, 294 in2 [1896 cm2] or equiv.
e
Heatsink Required : 0.125 [3.2] Alum. Plate, 895 in2 [5780 cm2] or equiv.
a
Ordering Information
For Non-Inductive Windings / insert the letter “N” ( i.e. UALN-25 )
Part Number - Resistance - Tolerance - TCR ( If not standard )
Example: UAL-25 10 Ohm 1%
Document Number: 64325
Revision: 20-09-10
For technical questions, contact: powertron@vishaypg.com
www.powertron.de
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