Square D LX36150 Molded Case Circuit Breaker

This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes the proprietary I-Line plug-on connection to mount directly to the bus stack.

The LX36150 utilizes a blow-on jaw design. During a high-level short circuit, the magnetic forces generated draw the connector jaws together, gripping the I-Line bus bar more firmly to maintain a secure connection.

The Micrologic LSI trip unit allows you to customize the Long-Time (L) setting for overload protection, the Short-Time (S) setting for short-circuit coordination, and the Instantaneous (I) setting for immediate fault clearing.

The LX frame is a legacy molded case circuit breaker. When replacing this unit in modern facilities, panel builders often upgrade to the newer Square D PowerPacT L-Frame series, which may require an I-Line filler plate.

The standard mechanical lugs accept either a single 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors. The terminals are rated for both aluminum and copper (Al/Cu) wire.

No. The I-Line plug-on jaws connect to the bus bar without fasteners, reducing installation time. You only need a screwdriver to secure the mechanical mounting bracket to the panel interior.

The breaker features a push-to-trip button on the front cover. Pressing this button manually exercises the tripping mechanism, allowing you to confirm mechanical operation and test auxiliary devices without applying a fault current.

The LX36150 provides a 100kAIC rating at 240VAC, a 65kAIC rating at 480VAC, and a 35kAIC rating at 600VAC, making it suitable for high-fault commercial and industrial distribution systems.