Riedon offers the best lead-time in the industry. Average lead-time is 4-5 weeks for wire wound resistors. 1-2 week premium delivery is also available!

Aluminum Housed Wirewound Resistors

UAL Series

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
Type	MIL-R-39009 MIL-R-18546 Style	Commercial	MIL	Free Air	Resistance Range¹
UAL-5	RER-60 / RE-60	7.5^a	5^a	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 70K
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	0.01 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.