Square D HDL36110 Molded Case Circuit Breaker

This model features a unit-mount design with mechanical lugs on both the line and load sides. It installs by securing it directly to a backpan or mounting plate using screws, rather than plugging onto a bus system.

No. The HDL36110 is a unit-mount circuit breaker. To install a 110A PowerPacT H-Frame breaker into an I-Line panelboard, you will need the I-Line version, which typically uses the HDA or HGA prefix.

The standard AL150HD lugs accept both copper and aluminum wire. For 14 to 10 AWG wire, torque the binding screw to 50 lb-in (5 N.m). For 8 to 3/0 AWG wire, torque to 120 lb-in (14 N.m). Always verify torque values against the printed manufacturer label prior to installation.

No. This breaker is equipped with a thermal-magnetic trip unit that has fixed thermal and fixed magnetic trip settings. If your application requires adjustable trip settings, you must upgrade to a PowerPacT H-Frame model equipped with a MicroLogic electronic trip unit.

The "D" in the catalog number indicates the breaker's interrupting rating performance level. For the PowerPacT H-Frame series, the "D" tier designates an interrupting capacity of 25kA at 240VAC, 18kA at 480VAC, and 14kA at 600VAC.

Yes. The PowerPacT H-Frame series serves as a modern upgrade and designated replacement for legacy Square D F-Frame breakers, such as the FA or FH models, offering higher performance and a wider range of field-installable accessories.

When the breaker trips due to an overcurrent or short circuit, the operating handle moves to a center position between ON and OFF. To restore power, you must first pull the handle completely to the OFF position to reset the internal toggle mechanism, and then push it back to the ON position.