Square D | HDL36040C | Circuit Breaker | 40A | 3-Pole

Trusted performance from Square D with the HDL36040C 40A, 3-Pole circuit breaker — purpose-built for maintenance, retrofit, and replacement tasks where exact specs matter. This unit is the precise choice when a 3-phase protection device is required and the 40-amp rating aligns with your load profile.

• Three-pole configuration for 3-phase systems: Ensures simultaneous disconnection across all live conductors, enhancing safety and simplifying control in multi-phase panels.
• 40 ampere rating: Suited for moderate-load circuits and equipment in commercial or light industrial settings, providing reliable overcurrent protection without nuisance tripping.
• Definitive compatibility reference: The part number HDL36040C is the best reference for matching fit and ratings in Square D panelboards and enclosures.
• Ideal for retrofits and replacements: Designed to drop into existing Square D systems that specify a 3-pole, 40A device, helping minimize downtime during upgrades or servicing.

How to verify compatibility before ordering:

• Check that your panel label calls for a 3-pole, 40A Square D circuit breaker and that HDL36040C is an exact cross-reference.
• Confirm the panel model and version align with the HDL36040C’s intended application as a replacement or retrofit part.
• Ensure the device is used in a 3-phase distribution or motor control scenario where all three hot legs require simultaneous disconnection.

Use cases that benefit from this specific breaker:

• Retrofit projects in commercial electrical panels where a 3-pole 40A protection device is specified.
• Replacement for a failed or worn 3-pole, 40A circuit breaker within compatible Square D systems.
• Protection for 3-phase motor circuits, HVAC equipment, and other three-wire distributions in small-to-mid size facilities.

Practical installation and safety notes:

• Power down the panel and verify absence of voltage before servicing or replacing breakers.
• Follow local electrical codes, use proper PPE, and adhere to lockout/tagout procedures during replacement.
• Ensure your panel’s bus configuration and mounting support the HDL36040C’s 3-pole, 40A format for secure seating and reliable operation.

In short, the Square D HDL36040C 40A 3-Pole circuit breaker delivers dependable, three-phase overcurrent protection with a straightforward path to compatibility. When maintenance or retrofits demand exact spec matching in Square D panels, this part keeps power flowing safely and reliably.