Square D | MEF236LSIG | Circuit Breaker | 250A | 3-Pole | 600V

When your electrical distribution demands reliable protection with exacting compatibility, the Square D MEF236LSIG circuit breaker stands ready. Rated for 250A across a 3-pole configuration and suitable for systems up to 600V, this device is purpose-built for maintenance, retrofit, and replacement scenarios where matching specifications is non-negotiable.

• Amperage: 250 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Part number: MEF236LSIG

Why this model matters: the MEF236LSIG is the best reference for compatibility with existing Square D installations. Using the exact part number minimizes panel downtime, preserves mounting geometry, and ensures trip characteristics align with your current protection scheme. It’s designed to slot into legacy panels and distribution boards without the guesswork that comes with cross-reference replacements.

Ideal applications

Best suited for 3-phase electrical systems in industrial, commercial, or institutional settings where 250A protection is required and a 600V maximum is standard. Use cases include main distribution panels, motor control centers, and retrofit projects where precise form factor and ratings are essential to keep equipment safeguarded and running smoothly.

Compatibility and installation tips

• Confirm that your panel label or documentation specifies MEF236LSIG and a 600V rating.
• Verify mounting style, bus connection, and physical fit align with your existing Square D 3-pole breakers in this series.
• Check that the expected load and fault-current conditions fall within the device’s protection capabilities to maintain safe, reliable operation.

Care and handling: store and install with standard electrical safety practices in mind. Use the correct protective gear and follow established lockout/tagout procedures during replacement to protect personnel and maintain system integrity.