Square D KCL34110 Molded Case Circuit Breaker

No, the KCL34110 is a legacy K-frame molded case circuit breaker that has been discontinued by Schneider Electric. For new installations or direct replacements, the modern equivalent is the Square D PowerPact H-frame series, which covers amperages up to 150A and offers improved features while maintaining compatibility with many older systems.

This is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the backpan of compatible Square D enclosures, switchboards, or panelboards, and wired via lugs on both the line and load sides. It is not compatible with I-Line plug-on bus systems.

The factory-installed lugs accept wire gauges ranging from 4 AWG to 350 kcmil. The terminals are rated for use with both aluminum (Al) and copper (Cu) conductors, providing flexibility for various installation requirements.

The KCL34110 features an LI (Long-Time and Instantaneous) trip unit. The thermal element provides overload protection and is fixed at 110A. The magnetic element provides short-circuit protection and is adjustable, allowing electricians to fine-tune the trip threshold to coordinate with specific load demands.

The maximum fault current this breaker can safely clear depends on the operating voltage. It provides an extra-high interrupting capacity of 65kA for 480VAC and 277VAC systems, and up to 100kA when installed in 240VAC applications.

Yes, this K-frame breaker supports several internal accessories for remote control and status monitoring. Available options include shunt trips, auxiliary switches, undervoltage releases, and bell alarms.

This breaker is UL 489 listed, CSA certified, and HACR rated for use with heating, air conditioning, and refrigeration equipment. It also includes a trip-free mechanism, ensuring the contacts will open during an overcurrent event even if the operating handle is physically held in the ON position.