Miniature Circuit Breakers

Miniature Circuit Breakers (MCBs) are a vital element for circuit protection in f electrical systems. They protect circuits from overloads and short circuits, preventing damage to equipment, and potentially dangerous electrical fires or injury. Breakers are automatic switches that interrupt the flow of electricity by tripping quickly and shutting off power to the affected circuit before any damage from an overload or short circuit occurs. NOARK’s MCBs offer excellent quality in a compact size and are backed with our standard 5-year warranty which makes them ideal for use in a wide range of applications.

A three-pole circuit breaker labeled "Noark B1H" with a C 20 A rating, displaying on/off switches for each pole.

B1N

• 10kA at 240Vac
• 0.5A to 63A
• Available in 1, 2 & 3-pole

Circuit breaker with green accents, labeled "Noark B1H." It features dual toggle switches and technical specifications printed on the side.

B1H

• 10kA at 480Y/277Vac
• 0.5A to 32A
• Available in 1, 2 & 3-pole

Circuit breaker with dual switches and label markings, labeled "NOARK" and "B10," showing line and load connections, safety instructions, and specifications.

B1NQ

• 10kA at 120/240Vac
• 0.5A to 63A
• Available in 1 & 2-pole

A Noark circuit breaker with two switches, labeled C 20 A, 250V. It includes off/on toggles and various technical specifications printed on its surface.

B1D

• 10kA at 250Vdc
• 0.5A to 63A
• Available in 1 and 2-pole

Four-pole circuit breaker with ON/OFF switches, labeled "NOARK B1B," rated for 20A and 400V.

B1B

• 10kA at 500Vdc/2-pole & 1000Vdc/4-pole
• 25A to 63A
• Available in 2 & 4-pole

A white electrical circuit breaker with four switches, labeled "NOARK" and specifications including 125A, 480Vac, and UL certification.

B1E

• Up to 125A
• 5kA at 480Y/277Vac and 10kA at 240Vac
• 10kA at 220Vdc (B1E 80~125A 2-Pole)
• Available in 1,2, 3 and 4-pole

A four-pole circuit breaker labeled "NOARK" with a C63A rating for 600V, featuring a UL 1077 certification mark.

Ex9BP

• 10 – 63A
• 6kA at 600Vdc
• Available in 2 & 4-pole

A modern, automated bottling line in a factory, featuring rows of transparent bottles on a conveyor belt amid a network of pipes and machinery.

Comprehensive Protection with B1E and B1 UL Miniature Circuit Breakers

The B1E UL 1077 miniature circuit breaker has a complete range of amperages from 1A to 125A. Standard ratings of 5 kA at 480Y/277 Vac and 10 kA at 240 Vac. These are suitable for supplementary protection. On the other hand, the B1 UL 489 miniature circuit breakers are available in a complete range of amperages from 0.5A to 63A. Standard ratings of 10 kA at 480Y/277 Vac and 10 kA at 125 Vdc. These are suitable for branch circuit protection.

Features

Miniature circuit breakers mount on standard 35 mm DIN rail

Module width of only 0.71 in (18 mm) per pole

5-Year limited warranty

No compatible accessories listed yet.

New UL 489 DIN Rail DC Miniature Circuit Breakers from NOARK Electric

Pomona, CA – NOARK Electric is proud to announce the release of new UL 489 branch circuit breakers – the Ex9-Series B1D. These new…

Newsletter

Subscribe to our NOARK newsletter today to receive exclusive product releases, industry tech tips, company updates, and more.