{"product_id":"square-d-hdl36040c-circuit-breaker","title":"Square D | HDL36040C | Circuit Breaker | 40A | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003eTrusted 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.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration for 3-phase systems\u003c\/strong\u003e: Ensures simultaneous disconnection across all live conductors, enhancing safety and simplifying control in multi-phase panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40 ampere rating\u003c\/strong\u003e: Suited for moderate-load circuits and equipment in commercial or light industrial settings, providing reliable overcurrent protection without nuisance tripping.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDefinitive compatibility reference\u003c\/strong\u003e: The part number HDL36040C is the best reference for matching fit and ratings in Square D panelboards and enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIdeal for retrofits and replacements\u003c\/strong\u003e: Designed to drop into existing Square D systems that specify a 3-pole, 40A device, helping minimize downtime during upgrades or servicing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eHow to verify compatibility before ordering:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCheck that your panel label calls for a 3-pole, 40A Square D circuit breaker and that HDL36040C is an exact cross-reference.\u003c\/li\u003e \u003cli\u003eConfirm the panel model and version align with the HDL36040C’s intended application as a replacement or retrofit part.\u003c\/li\u003e \u003cli\u003eEnsure the device is used in a 3-phase distribution or motor control scenario where all three hot legs require simultaneous disconnection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUse cases that benefit from this specific breaker:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRetrofit projects in commercial electrical panels where a 3-pole 40A protection device is specified.\u003c\/li\u003e \u003cli\u003eReplacement for a failed or worn 3-pole, 40A circuit breaker within compatible Square D systems.\u003c\/li\u003e \u003cli\u003eProtection for 3-phase motor circuits, HVAC equipment, and other three-wire distributions in small-to-mid size facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical installation and safety notes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePower down the panel and verify absence of voltage before servicing or replacing breakers.\u003c\/li\u003e \u003cli\u003eFollow local electrical codes, use proper PPE, and adhere to lockout\/tagout procedures during replacement.\u003c\/li\u003e \u003cli\u003eEnsure your panel’s bus configuration and mounting support the HDL36040C’s 3-pole, 40A format for secure seating and reliable operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn 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.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426667843746,"sku":"HDL36040C","price":2603.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/square-d-hdl36040c-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}