Square D LAL36225MB Molded Case Circuit Breaker

The adjustable magnetic trip settings on this 225A circuit breaker range from a low of 1125A to a high of 2250A. The thermal overload trip point remains fixed.

The MB suffix denotes a short operating handle. This compact handle design provides extra front clearance, allowing panel doors to close securely in shallow switchboards or enclosures where a standard handle would interfere.

The short handle works correctly with LA400R, LA400S, and LA400F enclosures and is compatible with the standard HPALM padlock attachment. It will not engage the internal operating cross arm in NEMA 12 or 4X stainless steel enclosures like the LA400AWK or LA400DS.

For new installations or system upgrades, the Square D PowerPacT J-Frame series is the primary modern replacement for 225A LAL breakers. Panel builders must verify physical dimensions and handle clearances, as the PowerPacT footprint differs from the legacy L-Frame series.

The factory mechanical lugs accept single or dual conductor configurations. An installer can land one 1 AWG to 600 kcmil aluminum or copper wire, or two 1 AWG to 250 kcmil aluminum or copper wires per phase.

Yes, the breaker features a Push-to-Trip button. This allows licensed electricians to manually exercise the internal tripping mechanism and verify mechanical operation during maintenance without exposing themselves to live electrical busbars.

Yes, the circuit breaker carries a formal HACR rating. This certifies the unit to provide reliable overcurrent and short-circuit protection for heavy-duty heating, air conditioning, and refrigeration group motor loads.