Square D HJL36080 Molded Case Circuit Breaker

In the Square D PowerPacT nomenclature, 'H' indicates the breaker frame size (150A maximum capacity). 'J' designates the specific interrupting rating tier (100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC). The 'L' indicates the breaker is factory-equipped with lugs on both the line and load sides.

The standard factory lugs (AL150HD) require different torque values depending on the wire gauge installed. For 14 AWG to 10 AWG wire, tighten the lugs to 44.3 lb-in (5 N.m). For larger 8 AWG to 3/0 AWG conductors, the required tightening torque is 123.9 lb-in (14 N.m).

No, the HJL36080 uses a fixed thermal-magnetic trip unit. Both the thermal overload and instantaneous magnetic trip points are factory-set and cannot be adjusted in the field. The magnetic hold current is fixed at 800A, and the instantaneous trip current is 1450A.

Yes. Standard unit-mount PowerPacT H-frame breakers with thermal-magnetic trip units do not have specific line and load directional markings on the terminals. This makes them suitable for reverse-fed applications, such as back-feeding a main breaker in a control panel.

Yes. The PowerPacT H-frame features an internal accessory compartment behind the front cover. It accepts snap-in, field-installable accessories including up to two auxiliary contacts (OF), an alarm switch (SD), an overcurrent trip switch (SDE), and a shunt trip or undervoltage release (MX/MN).

As a unit-mount (feed-thru) breaker, the HJL36080 is designed to be mounted individually to a backpan or mounting plate using screws. It is commonly used in industrial control panels, motor control centers, and dedicated standalone enclosures. It does not feature plug-on jaws and cannot plug into an I-Line panelboard.

The HJL36080 features a mechanical push-to-trip button located on the front faceplate. Pressing this button allows qualified personnel to manually trip the breaker mechanism, ensuring the mechanical linkage is operating effectively before servicing the equipment.