{"product_id":"square-d-hda260401-40a-600v-2-pole-plug-in-circuit-breaker","title":"Square D HDA260401 - 40 A, 600 V, 2-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D HDA260401\u003c\/strong\u003e is a \u003cstrong\u003e40 A, 600 V\u003c\/strong\u003e, \u003cstrong\u003e2-pole plug-in molded case circuit breaker\u003c\/strong\u003e designed to deliver dependable branch circuit protection in panelboards and load centers. Available from AmpState, this unit emphasizes fast, hassle-free installation and robust protection for demanding electrical layouts.\u003c\/p\u003e \u003ch2\u003eWhy this 2-Pole Plug-In Breaker Stands Out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e: streamline upgrades and replacements with a tool-free, snap-in mount that minimizes downtime on service panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: combines predictable thermal protection for sustained overcurrents with instantaneous magnetic response to short circuits, delivering stable, repeatable protection curves.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e: engineered to pair with matching Square D load centers and panelboards, ensuring reliable operation and fitment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile voltage and current rating\u003c\/strong\u003e: handles up to \u003cstrong\u003e600 V\u003c\/strong\u003e and \u003cstrong\u003e40 A\u003c\/strong\u003e for a wide range of branch circuits, from residential feeders to light commercial installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical Specifications at a Glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HDA260401\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eResidential service panels where a reliable 2-pole, 40 A protection device is required for shared-neutral or multi-wire branch circuits.\u003c\/li\u003e \u003cli\u003eCommercial distribution boards and light industrial panels needing quick replacement without rewiring or panel modification.\u003c\/li\u003e \u003cli\u003eUpgrades or replacements in existing Square D panel systems where OEM compatibility ensures consistent trip behavior and mechanical fit.\u003c\/li\u003e \u003cli\u003eProtection for equipment-powered circuits in workshops, garages, and small facilities that demand robust short-circuit and overload safeguards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eHow It Protects Your System\u003c\/h2\u003e\n\u003cp\u003eThe combination of a thermal element and magnetic trip in the HDA260401 delivers precise protection: the thermal component guards against gradual overheating from overcurrent, while the magnetic element responds instantly to severe fault currents. This dual-action approach reduces nuisance trips during normal startup and delivers rapid clearance during faults, helping protect wiring, devices, and downstream components.\u003c\/p\u003e \u003ch2\u003ePractical Considerations and Tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eEnsure the panelboard or load center is a compatible Square D design to maintain optimal fit and performance.\u003c\/li\u003e \u003cli\u003eMatch the device amperage and voltage ratings to the circuit it protects; in a 240 V system, a 2-pole breaker like this one is ideal for shared-neutral or multi-wire branch circuits.\u003c\/li\u003e \u003cli\u003eDuring installation, confirm the plug-in terminals are clean and free of debris to ensure a solid, reliable connection and consistent trip performance.\u003c\/li\u003e \u003cli\u003eConsider this breaker as a straightforward upgrade option when renewing aging protection devices in residential or light-commercial panels.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith its blend of quick-install plug-in functionality, reliable thermal-magnetic protection, and OEM-aligned design, the Square D HDA260401 delivers targeted, durable protection for your most important electrical circuits.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355241435298,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_112d5750-f26f-459f-9503-55ce83fb0ca3.png?v=1764690702","url":"https:\/\/www.ampstate.com\/products\/square-d-hda260401-40a-600v-2-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}