Square D HDA36045 Molded Case Circuit Breaker 45A 600V 3P

Product Description

The SQUARE D HDA36045 is a 3-pole, plug-in molded case circuit breaker rated for 45 amps and 600 VAC. It uses a thermal-magnetic trip mechanism to provide overload and short-circuit protection in three-phase electrical distribution systems. Wire range is 14 to 3/0 AWG, accommodating a broad range of conductor sizes. Terminal connection options include I-Line and lug configurations. Licensed electricians install this breaker in panelboards, switchboards, and motor control centers where reliable branch-circuit protection is required under NEC guidelines.

This breaker is suited for commercial and industrial three-phase power distribution applications. The plug-in mounting style allows installation into compatible Square D panelboards and switchboards without additional hardware. The thermal-magnetic trip mechanism responds to both sustained overloads and instantaneous short-circuit events, making it appropriate for feeder and branch-circuit protection in demanding service environments. Multiple breaking capacity ratings extend its usefulness across a range of fault-current levels.

Key Features

• 45 amp continuous current rating at 600 VAC
• 3-pole configuration for three-phase circuit protection
• Thermal-magnetic trip mechanism for overload and short-circuit response
• Wire range of 14 to 3/0 AWG supports varied conductor sizes
• I-Line and lug terminal connection options
• Plug-in mounting for tool-free installation into compatible panelboards

Compatibility

Designed as an OEM-style replacement molded case circuit breaker for use in compatible three-phase panelboards and switchboards accepting plug-in style breakers.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the panelboard or switchboard before handling or installing the breaker. Verify that the bus structure accepts the plug-in I-Line connection style and that conductor sizing falls within the 14 to 3/0 AWG range before terminating wires. Do not exceed the breaker's voltage or amperage rating for the intended circuit.