Square D KI36110 Molded Case Circuit Breaker

The KI36110 is an I-Line style plug-in circuit breaker designed exclusively for use in Square D I-Line panelboards and switchboards. It mounts directly to the bus stack and is incompatible with standard QO, Homeline, or NQ/NF load centers.

The factory lugs on this breaker accept 4 AWG to 350 kcmil aluminum or copper wire. Always ensure proper torque specifications are applied during installation as outlined on the breaker faceplate.

No, the KI36110 features an I-Line style plug-in connection. The breaker jaws plug directly onto the I-Line bus stack, and it is secured to the panel backpan using the breaker's built-in captive retaining screw.

This breaker features a thermal-magnetic trip unit with a fixed thermal setting for overload protection and an adjustable magnetic dial. The adjustable magnetic setting allows electricians to fine-tune the instantaneous short-circuit response to coordinate with downstream devices or handle specific load inrush currents.

Yes, the KI36110 is a current-limiting molded case circuit breaker. It is engineered to clear a fault in less than half a cycle, significantly reducing the let-through energy to protect downstream equipment during a short circuit.

The LI designation indicates that the breaker provides Long-Time (L) and Instantaneous (I) protection. The Long-Time function protects against sustained overloads, while the Instantaneous function protects against sudden short circuits.

The KI frame is part of Square D's legacy K-Frame series. While it has been largely superseded by the newer PowerPact H-Frame series for new installations, the KI36110 remains widely used as a direct replacement for existing I-Line setups.