Square D HGL36040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D HGL36040 — a 40 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for three-phase loads, this compact unit preserves valuable panel space while delivering precise, repeatable protection when it matters most.

What sets the HGL36040 apart

• Compact molded-case design optimizes panel real estate, making it ideal for tighter electrical enclosures without compromising protection or ease of installation.
• Thermal-magnetic trip unit provides stable, repeatable protection by sensing both overload conditions (thermal) and short-circuit events (magnetic) for predictable trips.
• 3-pole configuration ensures balanced protection for three-phase circuits, maintaining coordination and safety across multi-wire loads.
• 600 V rating supports commercial and light industrial applications, giving you solid protection for higher-voltage panelboards and loadcenters.
• 40 A rating targets common branch circuit protections, enabling reliable control of moderate load currents in varied environments.
• OEM compatibility designed to pair with matching Square D loadcenters and panelboards for straightforward replacement and verified performance.
• Trusted Square D reliability with a proven track record in electrical distribution, used across residential, commercial, and light industrial settings.

Ideal use cases

Perfect for protecting three-phase branch circuits in panelboards and loadcenters where space is at a premium and robust short-circuit protection is required. Suitable for electrical installations in homes with commercial-grade panels, small to mid-size businesses, and light industrial environments where dependable, repeatable trip performance is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: HGL36040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 40 A
• Voltage: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Installation and practical considerations

Choose the HGL36040 when your panelboard or loadcenter requires a matching OEM device to ensure seamless integration, proper trip coordination, and reliable performance under fault conditions. Verify that your installation context supports a 600 V, 3-pole device and that the panel’s labeling and rating align with a 40 A protective solution. For best results, pair with other Square D HGL-series components to maintain consistent trip characteristics and service continuity across your electrical distribution equipment.

In short, the Square D HGL36040 delivers compact, reliable, three-phase protection with a thermal-magnetic trip profile, designed to fit and perform in practical residential, commercial, and light industrial setups. It’s a purposeful choice when you need solid protection without compromising panel space or compatibility.