Square D HGA36040 - 40 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D HGA36040, a 40 A, 600 V, 3-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit protection for panelboards and load centers. For professionals and installers, its fast plug-in connection means quicker installations and streamlined replacements, minimizing downtime on service upgrades or routine maintenance.

Designed for consistent performance, the thermal-magnetic trip unit provides stable, repeatable protection across varying loads and temperatures. The thermal element protects against sustained overloads, while the magnetic element responds rapidly to short-circuit conditions, helping safeguard wiring, devices, and connected equipment without nuisance trips.

Compatibility is a core advantage: this unit is built to work with matching OEM load centers and panelboards, ensuring a seamless fit and dependable operation in Square D systems. Whether you’re configuring a new residential panel, updating a commercial load center, or provisioning light industrial gear, this plug-in breaker helps you achieve clean, compliant protection with minimal compatibility concerns.

Key specifications at a glance

• Manufacturer: Square D
• Part number: HGA36040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection
• Compatibility: Matching OEM load centers and panelboards
• Ideal for: Residential, commercial, and light industrial electrical systems

Why choose this breaker—and how it helps your system

• Fast plug-in installation reduces downtime during panel upgrades and replacements, enabling rapid restoration of circuit protection.
• Thermal-magnetic protection delivers precise trip behavior, balancing dependable overload protection with responsive short-circuit interrupting capability.
• OEM compatibility ensures a confident fit in Square D panelboards and load centers, minimizing compatibility concerns during procurement and installation.
• 3-pole design supports three-phase configurations where required, enabling versatile use across residential, commercial, and light industrial applications.
• Durable molded case construction provides robust protection in environments where space is at a premium and reliability is non-negotiable.

Whether you’re stocking up for routine maintenance, planning a panel upgrade, or specifying components for a new installation, the Square D HGA36040 from AmpState delivers trusted performance and straightforward serviceability. It’s the practical, dependable choice for branch circuit protection in modern electrical systems.