Square D JGA36225 Molded Case Circuit Breaker

It utilizes a plug-on jaw connection on the line side that attaches directly to the busway in Square D I-Line panelboards and switchboards. The load side requires field wiring using the included AL250JD mechanical lugs.

The AL250JD load-side mechanical lugs, which accept 3/0 AWG to 350 kcmil aluminum or copper wire, should be torqued to 225 lb-in using a 5/16-inch hex bit. Proper torque is critical for safe operation and to prevent thermal issues at the termination point.

Yes. While the thermal overload protection is fixed at 225 amps, the instantaneous magnetic trip is adjustable. Electricians can dial the magnetic trip threshold, typically between 1125A and 2250A, to coordinate short-circuit protection with downstream devices.

In the PowerPacT J-Frame nomenclature, the G denotes the specific interrupting capacity tier. It indicates the breaker can safely clear a 65kA fault at 240VAC, 35kA at 480VAC, and 18kA at 600VAC.

No, the JGA36225 is a standard 80 percent rated circuit breaker. For continuous loads operating for three hours or longer, the applied current must not exceed 80 percent of the maximum rating (which is 180 amps) to comply with National Electrical Code requirements.

The breaker features an integral push-to-trip button on the front cover. Pressing this button manually trips the circuit breaker, allowing you to test the mechanical linkage and ensure the mechanism operates freely for routine safety and maintenance checks.