Amp UL1077 - 3-Pole, Miniature Circuit Breaker (MCB)

Amp UL1077 3-Pole Miniature Circuit Breaker (MCB) provides precise, reliable overcurrent protection for demanding electrical systems. With a 3-pole configuration, it safeguards three conductors in one compact device, enabling streamlined protection for three-phase circuits and multi-line control panels.

Designed for panelboards, switchboards, and control panels, this MCB is a strong fit for industrial, commercial, and OEM applications where dependable operation and safety matter. The UL1077 designation signals suitability for supplementary protection within complex electrical assemblies, helping you coordinate protection across the panel while simplifying maintenance.

Why this 3-pole MCB stands out

• Three-pole tri-phase protection consolidates protection for three conductors in a single device, reducing parts count and simplifying wiring.
• Reliable overcurrent protection interrupts excess current to prevent overheating, insulation damage, and system faults.
• Versatile installation compatible with distribution panels, motor control centers, and various control enclosures in harsh industrial environments.
• OEM-friendly design supports scalable panel builds and custom control architectures without sacrificing safety or performance.
• Clear, predictable trip behavior aids maintenance planning and minimizes unexpected outages, keeping lines up and running.

Use cases and applications

• Three-phase motor circuits in manufacturing, processing, or packaging lines
• Distribution panels feeding automated machinery and sensors
• OEM equipment enclosures requiring reliable, space-efficient protective devices
• Switchboards and control panels in commercial facilities with multi-branch circuits

Practical guidance for selection and installation

• Choose a trip rating that matches the circuit ampacity and conductor size to ensure coordinated protection with your main protective devices.
• Verify panel compatibility and mounting requirements for a smooth retrofit or new build.
• Ensure compliance with applicable standards and installation practices (UL 1077 and local regulations) for safety and reliability.