Square D KH36150 Molded Case Circuit Breaker

The KH36150 is a legacy K-Frame circuit breaker that is no longer in active production. For new installations or modern upgrades, this model is superseded by the Square D PowerPact H-Frame or J-Frame series, such as the HJA36150 or JJA36150, which also utilize the I-Line plug-on connection.

This 150A breaker features a fixed thermal and adjustable magnetic trip unit. The instantaneous magnetic trip is adjustable, featuring a low setting of 750A and a high setting of 1500A. These settings can be dialed in on the front face of the breaker.

The KH36150 utilizes an I-Line style plug-in connection. It mounts directly onto the bus system of standard Square D I-Line panelboards and switchboards, allowing for fast, tool-free bus connection on the line side.

The factory lugs accommodate wire sizes ranging from 4 AWG to 350 kcmil. These lugs are dual-rated for use with either copper or aluminum conductors.

No. The KH36150 is an industrial K-Frame molded case circuit breaker with an I-Line plug-in mounting style. It will not fit in residential QO, Homeline, or NQOD panelboards.

The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) overcurrent protection. The long-time function protects against sustained overloads, while the instantaneous function quickly clears severe short circuits.

No. As an I-Line style breaker, the line-side jaw contacts and mounting bracket are integrated into the unit. It plugs directly into the interior bus of an I-Line panelboard and secures with a captive mounting screw, without the need for supplementary hardware kits.

Yes. In addition to its AC ratings up to 600VAC, the KH36150 is rated for use on 250VDC systems with an interrupting capacity of 10kA.