UAL Series
Aluminum Housed Power Wirewound Resistors
• Power Rating 5 to 300Watts
• High Temperature: -55°C to +275°C
• Excellent Pulse Handling
• Resistances from 0.01 to 250k Ohms
• Tolerance to ±0.01%
• Low TCR: ± 20ppm/K Standard
• Various Terminal Option Available
• All Welded Construction
UAL-25-4T
UAL-25-4
UAL-25-4TR
SPECIFICATIONS
MIL-R-39009
MIL-R-18546
Style
Power Rating ( W @ 25°C )
Resistance
Range1
Type
Commercial
7.5 a
MIL
5 a
Free Air
4.5
0.01 to 22K
0.01 to 47K
0.01 to 90K
0.01 to 250K
0.01 to 70K
0.01 to 50K
0.01 to 50K
0.01 to 68K
UAL-5
UAL-10
RER-60 / RE-60
RER-65 / RE-65
RER-70 / RE-70
RER-75 / RE-75
10 a
25 b
10 a
20 b
30 c
75 d
-
7.5
12
20
40
-
UAL-25
50 c
UAL-50
100 d
180 d
250 d
UAL-100²
UAL-180²
UAL-250²
UAL-300²
-
120 d
-
100
75
RER-80 / RE-80
-
300 e
1
For non-inductive windings, divide maximum resistance by 2
E-24 / E-96, check with factory on availability of other values
2
a
b
c
d
e
Heatsink Required : 0.040 [1.0] Alum. Plate, 129 in2 [832 cm2] or equiv.
Heatsink Required : 0.040 [1.0] Alum. Plate, 167 in2 [1077 cm2] or equiv.
Heatsink Required : 0.059 [1.5] Alum. Plate, 291 in2 [1877 cm2] or equiv.
Heatsink Required : 0.125 [3.2] Alum. Plate, 294 in2 [1896 cm2] or equiv.
Heatsink Required : 0.125 [3.2] Alum. Plate, 895 in2 [5780 cm2] or equiv.
Ordering Information
For Non-Inductive Windings / insert the letter “N” ( i.e. UALN-25 )
Part Description: Part Type - Resistance - Tolerance - TCR ( If not standard )
Example: UAL-25 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: 201812_005