Square D KA36110 Molded Case Circuit Breaker

This legacy K-Frame breaker is engineered exclusively for Square D I-Line panelboards and switchboards. It utilizes a specialized stab-on mounting bracket and will not install into standard NQ, NF, or QO load centers.

The mechanical lugs on the load side accept 4 AWG to 350 kcmil aluminum or copper wire. Because this is an I-Line breaker, the line side does not require wiring and connects directly to the panelboard bus via plug-on stabs.

Yes. While commonly utilized for 3-phase AC distribution up to 600VAC, it is fully rated for ungrounded or grounded 250VDC systems, providing a 10kA interrupting capacity for DC loads.

This thermal-magnetic breaker features a fixed thermal element for long-time overload protection and a front-accessible adjustable magnetic dial. This allows electricians to fine-tune the instantaneous short-circuit trip threshold to coordinate with specific inrush currents or downstream devices.

For system upgrades or replacing aging components, engineers typically specify the current PowerPact H-Frame series, such as the HGA36110. The PowerPact replacement matches the 110A rating and mounts directly onto the exact same I-Line bus.

Yes, this device carries an HACR rating under UL 489. It is certified to safely handle the specialized operational characteristics and inrush currents of heating, air conditioning, and refrigeration motor loads.

Yes, it is equipped with a Visi-Trip indicator. When a fault or overload trips the breaker, the handle rests in a center position and displays a highly visible red flag, allowing personnel to safely and quickly identify the interrupted circuit.