UB Series
Miniature Silicone Coated Power Resistors
• High Power Rating in a Small Package
• Excellent Pulse Handling
• High Temperature: -55°C to +250°C
• Resistances from 0.02 to 260kOhms
• Power Rating 1 to 15Watts
• Resistance Tolerances to ± 0.01%
• Low TCR: ± 20ppm/K Standard
• MIL-R-26 / MIL-R-39007 Power Ratings
• Non-Inductive Windings Available
• Flame resistant coating
SPECIFICATIONS
Dimensions
Maximum
Working
Voltage
MIL-R-26 /
MIL-R-39007
Style
Wattage Rating Maximum
Type
3
( Watts )
Ohms2
A
B
C1
±0.062”
[±1.6mm]
±0.031”
[±0.8mm]
±0.002”
[±0.05mm]
0.020 [0.5]
0.025 [0.6]
RW-81
RWR-81
UB-1
UB-2
UB-3
1
1.5
2
3.4k
7.5k
10k
0.250 [6.4]
0.312 [7.9]
0.406 [10.3]
0.085 [2.2]
0.078 [2.0]
0.094 [2.4]
33
42
80
0.020 [0.5]
0.025 [0.6]
RWR-82
0.025 [0.6]
0.020 [0.5]
RW-80
RWR-80
0.032 [0.8]
0.032 [0.8]
0.040 [1.0]
0.040 [1.0]
0.040 [1.0]
0.040 [1.0]
UB-3C
UB-5
3
4
12.5k
25k
0.350 [8.9]
0.560 [14.2]
0.500 [12.7]
0.625 [15.9]
0.875 [22.2]
1.220 [31.0]
0.156 [4.0]
0.187 [4.7]
0.250 [6.4]
0.250 [6.4]
0.312 [7.9]
0.312 [7.9]
135
162
194
258
425
607
UB-5C
UB-6
5
32k
6
50k
RW-84
UB-10
UB-12
7
95k
10
150k
0.040 [1.0]
UB-15
15
260k
1.780 [45.2]
0.375 [9.5]
1050
1
Lead Diameter: 18 AWG = 0.040” / 20 AWG = 0.032” / 22 AWG = 0.025” / 24 AWG = 0.020”
Where more than one lead is listed / the top value is Standard
For non-inductive windings / divide maximum resistance by 2
2
3
For non-inductive winding where R ≤ 0.10 Ohms, Tolerance is +0.063/-0.00 [+1.6/-0.0 mm]
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
© Riedon, Inc.
www.riedon.com
sales@riedon.com
Revised: 201807_001