Square D HGL36090 Molded Case Circuit Breaker 90A 3P

Product Description

The SQUARE D HGL36090 is a 3-pole molded case circuit breaker rated at 90 amps and 600 VAC, with an additional 250 VDC rating for DC applications. It uses a thermal-magnetic trip mechanism to provide overcurrent and short-circuit protection in panel-mounted electrical distribution systems. The breaker accepts wire sizes from 14 AWG through 3/0 AWG via lug-type terminals, making it suitable for a range of feeder and branch circuit applications. Licensed electricians and electrical contractors install this type of device during new construction, system upgrades, and service panel replacements. Multiple breaking capacity ratings provide application flexibility across different fault-current environments.

This circuit breaker is designed for panel mount installation in commercial and industrial electrical distribution equipment. Typical applications include feeder protection in load centers, switchboards, and motor control centers where 3-pole overcurrent protection is required. The 600 VAC rating supports use in standard three-phase commercial power systems. The 250 VDC rating extends compatibility to DC bus applications such as photovoltaic systems, battery storage, and drives. The lug terminals accommodate a wide AWG range, supporting both lighter branch conductors and heavier feeder cables in a single device.

Key Features

• 90-amp continuous current rating with thermal-magnetic trip for overload and short-circuit protection
• 3-pole configuration for three-phase circuit protection up to 600 VAC
• 250 VDC rating supports DC bus and photovoltaic system applications
• Lug-type terminals accept 14 AWG through 3/0 AWG conductors
• Panel mount design for installation in standard electrical enclosures and switchboards
• Multiple breaking capacity ratings listed under UL, CSA, CE, and IEC standards

Compatibility

Designed as an OEM-style replacement or new-installation molded case circuit breaker for 3-pole panel mount positions in commercial and industrial electrical distribution equipment rated up to 600 VAC.

Installation Notes

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 installation or removal of the breaker. Verify conductor sizing and torque terminal lugs per the wire manufacturer and NEC requirements. Do not exceed the breaker ampere or voltage ratings for the intended circuit.