Square D LA36225 Molded Case Circuit Breaker

This breaker features an I-Line style plug-in connection, designed exclusively for Square D I-Line panelboards and switchboards. It cannot be used in standard unit-mount or lug-to-lug enclosures.

Yes, this breaker is rated for use in DC systems up to 250VDC with a 10kA interrupting capacity, making it suitable for specific industrial DC distribution panels.

This model features a fixed thermal and adjustable magnetic trip unit. The magnetic trip is adjustable from a 1125A hold current up to a 2250A tripping current.

The LI code specifies that the trip unit provides Long-Time (thermal overload) and Instantaneous (magnetic short-circuit) protection, which is standard for thermal magnetic branch and feeder circuit coordination.

The load end utilizes a mechanical lug terminal that accepts either a single wire from 1 AWG to 600 kcmil or two wires from 1 AWG to 250 kcmil. Both aluminum and copper conductors are supported. The line side connects directly to the panel bus without lugs.

The breaker plugs directly onto the energized I-Line bus stack using built-in jaw contacts. This modular design allows for rapid installation and phases out the need for line-side bolted connections or cabling.

The LA36225 is an I-Line plug-in breaker specifically for I-Line panelboards. The LAL36225 is a unit-mount version of the same breaker frame, equipped with lugs on both the line and load sides for standard bolted enclosures.

No, the LA36225 is part of Square D's legacy L-Frame series. While newer installations often utilize PowerPact J-Frame equivalents for 225A loads, the LA36225 remains the exact replacement for existing legacy I-Line panelboards designed for LA breakers.

Standard electrical maintenance includes verifying that the load side lugs remain properly torqued to Square D specifications, checking the molded housing for thermal discoloration, and ensuring the I-Line panel bus is completely free of debris before seating the breaker.