Square D HGA36045 - 45 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HGA36045 is a robust 45A, 600V three-pole plug-in molded case circuit breaker engineered for reliable branch circuit protection in panelboards and loadcenters. Designed for fast installation and easy field replacement, it keeps critical electrical systems running with minimal downtime.

Fast, secure plug-in performance

With a fast plug-in connection, this breaker seats quickly into compatible panelboards, delivering a secure electrical contact and simplified serviceability. This means fewer steps during upgrades, routine maintenance, or after-supply changes, so downtime is kept to a minimum.

Precise thermal-magnetic protection

The built-in thermal-magnetic trip unit provides stable, repeatable protection across varying loads and temperatures. It combines long-term overload protection with instantaneous short-circuit interruption, helping protect wiring, devices, and loads from damage while reducing nuisance trips in moderate operating conditions.

Designed for compatibility and versatility

This 3-pole breaker is compatible with matching OEM loadcenters and panelboards, ensuring proper fit and coordinated protection across your distribution system. Ideal for residential, commercial, and light industrial applications where dependable, easy-to-manage protection is essential.

Specifications at a glance

• Manufacturer: Square D
• Part Number: HGA36045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and real-world scenarios

• Protecting feeders and branch circuits in residential panelboards that require 45A protection up to 600V.
• Supplying commercial distribution panels where three-phase protection is needed for equipment like motors and HVAC controllers.
• Retrofits or upgrades in light industrial setups where fast replacement and reliable protection minimize downtime and maintenance labor.

Why this breaker stands out

• Targeted protection for circuits prone to overload and short-circuit events without sacrificing reliability or speed of service.
• Plug-in design reduces installation time and simplifies future replacements compared to older or screw-in styles.
• Exact-fit compatibility with OEM loadcenters and panelboards to ensure correct mounting, trip performance, and panel labeling continuity.

Choose the Square D HGA36045 when you need a dependable, industry-standard circuit breaker that delivers quick installation, precise protection, and compatibility across residential, commercial, and light industrial panel systems.