Noark B1H2D3 - 3A, 277VAC, Miniature Circuit Breaker (MCB)

The Noark B1H2D3 is a compact 3A miniature circuit breaker designed to protect circuits operating at 277VAC. Built for reliability in demanding environments, this MCB provides precise overcurrent protection for panelboards, switchboards, control panels, and OEM equipment, helping you maintain uptime in everyday operations.

Engineered for industrial and commercial use, the B1H2D3 delivers fast, predictable interruption when overloads or faults occur. Its thermal-magnetic trip mechanism ensures sensitive protection for delicate loads while resisting nuisance trips on normal startup, making it a practical choice for distribution panels and motor control centers.

• Current rating: 3A
• Voltage rating: 277VAC
• Breaker type: Miniature Circuit Breaker (MCB)
• Suitable for: panelboards, switchboards, control panels, and OEM equipment
• Ideal applications: industrial, commercial, and OEM contexts where dependable overcurrent protection and safe operation in distribution panels and motor control centers are essential

Why it matters: selecting the Noark B1H2D3 means pairing your electrical system with a trusted protection device that is purpose-built for 277VAC networks. It helps prevent damage to wiring, relays, motors, and downstream devices while reducing downtime caused by electrical faults. For upgrades or new builds, this 3A MCB provides a precise, dependable solution that integrates smoothly into standard distribution architectures.

Specification snapshot

• Current rating: 3A
• Voltage rating: 277VAC
• Breaker type: Miniature Circuit Breaker (MCB)
• Application: panelboards, switchboards, control panels, and OEM equipment