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WEG UMBW-1B1-15 is a single-pole miniature circuit breaker (MCB) rated for 15A at 277/480VAC with a B trip curve. Designed for supplementary protection per UL 1077, this compact breaker features a thermal-magnetic trip mechanism for reliable overload and short-circuit protection in control panels, industrial equipment, and branch circuits. Its 1-pole design and 10kA interrupting capacity make it suitable for a wide range of commercial and light industrial applications.

MODEL UMBW-1B1-15

BRAND

WEG

SKU

2852262

WEIGHT

0.300 lb

UOM

each

Contact supplier for technical support on: 800-ASK-4WEG

$11.89 Each

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Typically Ships in: 1 day

Returnable: See conditions

Max voltage

277 VAC

Number of poles

1 pole

Rated current

1.5 A

Trip curve

Type

Thermal-magnetic

UL approval

UL1077

The UMBW has a range from 1 to 63 Amps, available in 1,2, 3 poles, and B, C, D trip curves. Single pole and multi-pole thermal-magnetic miniature circuit breakers (MCBs) are in accordance with EN 60947-2, UL 1077 and UL 489 for DIN rail mounting with toggle actuation, visual status indication, and high interrupt capacity. A positively trip-free snap action mechanism ensures reliable switching behavior. A range of trip characteristics and add-on accessories make the UMBW suitable for a variety of applications.

AC and DC voltages available in one series;
UL489 branch circuit protective device;
UL1077 equipment protection;
17.5mm width per pole;
Visual status indication;
Positive trip-free snap action mechanism to ensure reliable switching;
Cuttable bus bar connecting system.

SKU: 1307933

Just what i needed

This part arrived quickly and the price was right. Worked great for our application.

SKU: 2853624

Happy customer

My first time using MRO . The fast delivery " free" was fantastic .. received exactly what ordered at a very reasonable price , making my customer happy..

SKU: 2520103

Thanks, olha!

Olha, unlike the other service reps, actually got this order completed. If it wasn't for her, I would never spend another dime with your company, after what happened to my last order.

SKU: 2521370

Centrifugal switch

Absolutely what I expected in much less time than I expected! Will definitely order again.

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WEG UMBW-4D1-20 is a 1-pole miniature circuit breaker (MCB) rated for 20A at 277VAC/60VDC. This thermal-magnetic breaker features a D-type trip curve for applications with high inrush currents, such as small transformers or motors. It provides reliable overload and short-circuit protection in control panels, machinery, and lighting circuits. The compact UMBW series design is suitable for DIN rail mounting.

Brand	WEG
Model	UMBW-4D1-20

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