Square D MJA36350 Molded Case Circuit Breaker

No. The MJA36350 features an I-Line plug-on connection and is exclusively designed for use in Square D I-Line panelboards and switchboards. It will not fit standard residential or commercial QO, NQ, or NF panels.

Yes. The PowerPacT M-frame MJA36350 serves as a drop-in substitute for discontinued 350A MA and MH frame I-Line circuit breakers, maintaining compatibility with your existing I-Line panelboard bus system.

Yes. If your application requires a lower interrupting rating, the MGA36350 offers a 35kAIC rating at 480VAC, compared to the 65kAIC rating of the MJA36350.

The standard replacement mechanical lug kit for this breaker is part number AL800M23K. This kit accepts three 3/0 AWG to 500 kcmil aluminum or copper wires per phase on the load side.

The LI designation indicates that the ET 1.0 electronic trip unit provides Long-Time (overload) and Instantaneous (short-circuit) protection. It does not include Short-Time (S) or Ground Fault (G) options.

Yes, partially. While the long-time overload trip point is fixed at 350 amps, the instantaneous magnetic trip point is adjustable from 700A to 3500A (2 to 10 times the continuous current rating).

The I-Line mounting system utilizes a heavy-duty plug-on line connection that pushes directly onto the panelboard's stepped busbar assembly. A captive retaining bracket is then tightened to secure the breaker in place, eliminating the need for line-side cabling.

Yes. The breaker features a built-in push-to-trip button on the faceplate. This allows you to manually exercise the mechanical tripping linkage to ensure it operates freely during routine maintenance.