Westinghouse | MA3150 | Circuit Breaker | 150A | 600V

Meet the Westinghouse MA3150 Circuit Breaker — a purpose-built protection device designed to meet the demands of maintenance, retrofit, and replacement projects where exact specifications matter. With an amperage rating of 150A and a voltage tolerance up to 600V, this unit provides dependable circuit protection for mid-sized commercial and industrial electrical systems.

Why the MA3150 stands out

• Exact reference for compatibility — The MA3150 part number is the most reliable guide when confirming fit in panels and legacy equipment. Always verify the fit and ratings before ordering to ensure seamless installation.
• Robust electrical capacity — A 150A rating paired with a 600V capability makes this breaker suitable for protecting substantial branch circuits without compromising on safety.
• Maintenance, retrofit, and replacement ready — Ideal for upgrading aging systems, restoring service after outages, or stocking spare units for quick, downtime-minimizing replacements.
• Direct applicability in compatible Westinghouse panels — Designed to function as a direct substitute in systems calibrated for MA3150, helping you maintain consistent protection without reconfiguring upstream components.

Who is this for?

Electrical professionals, facilities managers, and service contractors working in commercial or light industrial environments where 150A circuits up to 600V require reliable, code-compliant protection. It’s particularly useful for panel maintenance programs, retrofit projects, and OEM replacement schedules where matching part numbers ensures proper fit and performance.

Practical use cases

• Replacing aging breakers in service panels that specify MA3150 compatibility.
• Upgrading isolated circuits to maintain consistent protection across a 150A, 600V system.
• Keeping a stocked spare for quick restoration after tripping events in critical operations.

Installation and compatibility tips

Before purchasing, confirm the panel model and routing are designed to accept MA3150 breakers. Use the part number MA3150 as the primary compatibility reference, and consult your equipment manual or supplier for any model-specific installation notes. When in doubt, cross-check the panel’s labeling and the breaker's rating to prevent mismatches and ensure safe operation.