Westinghouse | MA3125 | Circuit Breaker | 125A | 3-Pole | 600V

Meet the Westinghouse MA3125 circuit breaker—a precise, three-pole protection device engineered for 3‑phase systems up to 600V. This unit is tailor-made for maintenance, retrofit, and replacement projects where exact specifications matter, helping you keep electrical distribution safe, reliable, and compliant.

Key specifications

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 600V

Why choose the MA3125? The part number MA3125 is the most reliable reference for compatibility, ensuring the breaker matches your panel’s bus configuration and overall protection scheme. With a 3‑pole design and a 125A rating, it’s well-suited for distributing balanced current across three phases in commercial or light industrial environments.

Important compatibility note: Confirm fit and ratings before ordering. The MA3125 should be used in systems that require a 3‑phase, 125A protection device within a 600V maximum rating. Using the exact part number as your compatibility reference minimizes downtime and reduces the risk of mismatches in panel replacements.

Ideal use cases include:

• Retrofits to bring older panels up to current 3‑phase protection standards
• Replacements for aging or malfunctioning breakers in commercial or light industrial facilities
• Maintenance projects where consistent trip thresholds across all three phases are essential

Practical tips for a smooth upgrade: have the panel model and current wiring configuration on hand, verify the MA3125’s footprint and mounting arrangement aligns with your enclosure, and keep an on-hand stock of MA3125 units for rapid, planned maintenance. By aligning with the correct part number, you ensure reliable performance and safer electrical operation across your three-phase system.