Schneider Electric HDL36020 Molded Case Circuit Breaker

The HDL36020 features a fixed thermal-magnetic trip unit with a magnetic hold current of 350A and a magnetic tripping current of 750A.

The HDL36020 is designed for use in Square D industrial enclosures, switchboards, and motor control centers that accommodate unit-mount, feed-thru breakers. It cannot be plugged into I-Line panelboards.

This breaker features a unit-mount design, meaning it installs as a free-standing, feed-thru component. It secures to a backpan and uses mechanical lugs on both the line and load sides.

If the factory lugs are damaged or missing, you will need the AL150HD mechanical lug kit. This three-pole kit is the standard replacement for 15A to 150A H-frame breakers and accepts 14 AWG to 3/0 AWG aluminum or copper wire.

Yes, PowerPacT H-frame breakers feature dedicated internal accessory slots beneath the front cover. You can field-install compatible auxiliary contacts or shunt trips, such as the S29390 24VDC shunt trip.

In the Square D PowerPacT nomenclature, the D denotes the short-circuit breaking capacity. For this frame, it indicates an 18kA rating at 480VAC and a 14kA rating at 600VAC.

While both are 20A, 3-pole, H-frame breakers with identical interrupting ratings, the HDL36020 is a unit-mount breaker with lugs on both ends. The HDA36020 features an I-Line plug-on connection on the line side for use in I-Line panelboards.

No, the HDL36020 carries a standard 80 percent continuous current rating. For continuous loads lasting three hours or more, the circuit should be sized so the applied load does not exceed 16A per National Electrical Code requirements.