{"product_id":"square-d-qo31001021-100a-3p-240v-circuit-breaker","title":"Square D QO31001021 100A 3P 240V Circuit Breaker, Plug-On, Shunt Trip | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eDiscover the Square D QO31001021, a purpose-built circuit breaker engineered to safeguard panelboards, load centers, and electrical distribution networks. This 100 A, 3-pole, 240 V unit is part of the trusted QO family, and its plug-on design simplifies installation in the field.\u003c\/p\u003e \u003cp\u003eThe standout feature is the integrated plug-on shunt trip. When an external control signal is applied, the shunt trip interrupts power quickly, delivering a safe, remote-trip capability that complements manual operation for critical safety procedures and maintenance work.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact part-number match\u003c\/strong\u003e: QO31001021 is a direct replacement part, designed to drop into Square D panels without modification, reducing downtime and compatibility risk.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole protection\u003c\/strong\u003e: 3P configuration handles three-phase systems, with a 100 A rating for robust fault current interruption.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage and application\u003c\/strong\u003e: Rated for 240 V operation, ideal for standard industrial and commercial distribution setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-On mounting\u003c\/strong\u003e: Fast, tool-light installation that minimizes panel downtime during upgrades or replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eShunt-trip capability\u003c\/strong\u003e: Enables remote tripping via external control devices, enhancing safety protocols during maintenance or emergency scenarios.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePractical for stock and service teams\u003c\/strong\u003e: A smart choice for maintenance shops, panel builders, and spare inventories where quick access to exact fits matters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAssistance with fit\u003c\/strong\u003e: Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUse cases: replace failed breakers in commercial buildings, retrofit existing panels with remote-trip protection, or keep a ready spare on hand for rapid service calls. Compared to other solutions, the plug-on shunt-trip-equipped QO31001021 provides a precise, trusted replacement that integrates seamlessly with standard Square D QO equipment and distribution architectures.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410855448738,"sku":"QO31001021","price":1962.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/square-d-qo31001021-100a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}