BE Services, Inc., a subsidiary of Bourns, Inc., has purchased substantially all of Riedon's assets. See Press Release

High Pulse Resistors

UB Series

Miniature Silicone Coated Power Resistors

High Power Rating in a Small Package

Excellent Pulse Handling (Read more here)

High Temperature: -55°C to +250°C

Resistance from 0.02 to 260K Ohms

Power Rating 1 to 15 Watts

Resistance Tolerances to ±0.1%

Low TCR: ±20ppm/K Standard

MIL-R-26/MIL-R-39007 Power Ratings

Non-Inductive Windings Available

Type	Wattage Rating (Watts)	Max Ohms²	Dimensions			Max Working Voltage	MIL-R-26/ MIL-R-39007 Style
Type	Wattage Rating (Watts)	Max Ohms²	A ±0.062" [±1.6mm]	B³ ±0.031" [±0.8mm]	C¹ ±0.002" [±0.05mm]	Max Working Voltage	MIL-R-26/ MIL-R-39007 Style
UB-1	1	3.4K	0.250[6.4]	0.085[2.2]	0.020 [0.5] 0.025 [0.6]	33	RW-81 RWR-81
UB-2	1.5	7.5K	0.312[7.9]	0.078[2.0]	0.020 [0.5] 0.025[0.6]	42	RWR-82
UB-3	2	10K	0.406[10.3]	0.094[2.4]	0.025 [0.6] 0.020 [0.5]	80	RW-80 RWR-80
UB-3C	3	12.5K	0.350[8.9]	0.156[4.0]	0.032 [0.8]	135
UB-5	4	25K	0.560[14.2]	0.187[4.7]	0.032 [0.8]	162
UB-5C	5	32K	0.500[12.7]	0.218[5.5]	0.040 [1.0]	194
UB-6	6	50K	0.625[15.9]	0.250[6.4]	0.040 [1.0]	258
UB-10	7	95K	0.875[22.2]	0.312[7.9]	0.040 [1.0]	425	RW-84
UB-12	10	150K	1.220[31.0]	0.312[7.9]	0.040 [1.0]	607
UB-15	15	260K	1.780[45.2]	0.375[9.5]	0.040 [1.0]	1050

¹Lead Diameter: 18 AWG = 0.040" / 22 AWG = 0.025" / 24 AWG = 0.020"
Where more than one lead is listed / the top value is Standard
²For non-inductive windings / divide maximum resistance by 2

3For non-inductive winding where R ≤ 0.10 Ohms, Tolerance is +0.063/-0.00 [+1.6/-0.0 mm]