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The SQUARE D HDA36015 is a 3-pole, plug-in molded case circuit breaker rated for 15 amps at 600 VAC. It uses a thermal-magnetic trip mechanism to provide both overload and short-circuit protection in a single device. The breaker accepts I-Line and lug terminal connections, giving installers flexibility in panel configurations. It is designed for use in commercial and industrial power distribution systems where reliable branch-circuit protection is required. Licensed electricians typically specify this breaker for feeder and branch circuit applications in load centers and switchboards that accept SQUARE D I-Line mounting.
The HDA36015 is suited for commercial and light industrial electrical distribution panels operating at up to 600 VAC. It handles wire sizes from 14 AWG through 3/0 AWG, covering a broad range of conductor sizes used in branch and feeder circuits. This breaker fits panelboards and switchboards designed to accept plug-in or I-Line style molded case circuit breakers. Installers working on multi-phase commercial systems will find the 3-pole configuration appropriate for 208V, 240V, 480V, and 600V three-phase applications.
Designed as an OEM-style replacement molded case circuit breaker for SQUARE D I-Line and lug-compatible panelboards and switchboards rated for plug-in style breaker installation.
Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the panel before removing or installing the breaker. Verify that the panelboard bus accepts I-Line plug-in style breakers before seating the device. Confirm conductor sizing and torque requirements per the panel manufacturer specifications and NEC Article 240.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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