Square D MGA36600 Molded Case Circuit Breaker

This circuit breaker features an I-Line style plug-on connection designed exclusively for Square D and Schneider Electric I-Line panelboards and switchboards. It will not fit in standard unit-mount enclosures or competitor panels.

The MGA36600 is the modern PowerPacT M-frame replacement for the obsolete legacy MA-frame MA36600 circuit breaker. It drops directly into existing 600A I-Line panel spaces.

This standard model is 80 percent continuous current rated. Applications requiring a 100 percent continuous rating necessitate a different catalog number suffix.

The basic ET 1.0 solid-state trip unit acts as a precise equivalent to traditional thermal-magnetic breakers. While it provides electronic long-time and instantaneous (LI) protection, the long-time trip point is fixed and cannot be field adjusted.

The line side uses an integrated I-Line bracket for direct plug-on phase connections to the panel bus. The load side comes equipped with mechanical lugs accepting up to three 3/0 AWG to 500 kcmil aluminum or copper cables per phase.

Yes, it includes a manual push-to-trip button on the front cover. This allows qualified personnel to manually exercise the operating mechanism and verify proper mechanical function during maintenance.

Yes, manufacturer documentation states that 3-pole PowerPacT circuit breakers equipped with this electronic trip unit can be safely utilized in 2-pole configurations when necessary.

This standard 3-pole model features an ABC phase connection, meaning its line-side jaw bracket is factory configured to plug into all three phases (A, B, and C) of the I-Line bus.