Square D LHL36300 Molded Case Circuit Breaker

The LHL36300 features a higher interrupting capacity (AIC) than the standard LAL36300. The LHL36300 is rated to safely interrupt up to 65kA at 240VAC and 35kA at 480VAC. By comparison, the LAL36300 is limited to 42kA at 240VAC and 30kA at 480VAC. Both breakers share the identical physical footprint and unit-mount design.

For the factory-standard AL400LA lugs, the wire binding screw must be tightened to 375 in-lbs (42 N-m). The lug mounting screw that secures the lug body to the breaker terminal requires a torque of 120 in-lbs (13 N-m).

Yes. The included AL400LA lugs are designed to accept either a single 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors per phase. They are rated for both copper and aluminum wire.

No. The LHL36300 is a unit-mount circuit breaker designed for L-frame enclosures, switchboards, and standard panelboards using feed-thru lug connections. It lacks the plug-on jaw construction required for an I-Line panelboard bus.

The LHL36300 features an adjustable instantaneous magnetic trip with a range from 1500A to 3000A. The thermal overload trip function is fixed at 300A.

The breaker is equipped with a Push-to-Trip button. This allows electricians to manually trip the breaker and test the mechanical linkage without exposing themselves to live electrical components.

Yes. This circuit breaker is HACR rated, meaning it is tested and certified for use with heating, air conditioning, and refrigeration systems that generate high inrush currents during motor startup.