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Aluminum Housed Wirewound Resistors

UAL Series

Aluminum Housed Wirewound Resistors

pdf
UAL-25.jpg
UAL_group.jpg

  • Power Rating 5 to 300 Watts
  • High Temperature: -55°C to +275°C
  • Excellent Pulse Handling (Read more here)
  • Resistances from 0.005 to 250K Ohms
  • Tolerances to ±0.01%
  • Low TCR: ±20ppm/K Standard
  • Four Terminal Versions Available
  • All Welded Construction
Type MIL-R-39009
MIL-R-18546
Style
Power Rating ( W @ 25°C ) Resistance Range1
Commercial MIL Free Air
UAL-5 RER-60 / RE-60 7.5a 5a 4.5 0.01 to 22K
UAL-10 RER-65 / RE-65 12.5a 10a 7.5 0.01 to 47K
UAL-25 RER-70 / RE-70 25b 20b 12 0.01 to 90K
UAL-50 RER-75 / RE-75 50c 30c 20 0.01 to 250K
UAL-100 RER-77 / RE-77 100d 75d 40 0.01 to 70K
UAL-180 - 180d - - 0.01 to 50K
UAL-250 RER-80 / RE-80 250d 120d 100 0.01 to 50K
UAL-300 - 300e - 75 0.01 to 68K

1 For non-inductive windings, divide maximum resistance by 2
a 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.

pdfSee PDF Datasheet for Full Specifications

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