{"product_id":"zinsco-q243040-circuit-breaker","title":"Zinsco | Q243040 | Circuit Breaker | 40A | 3-Pole | 240V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Zinsco Q243040 circuit breaker—a purpose-built, 40-amp, 3-pole device engineered for reliable overcurrent protection in 240V systems. Designed with retrofit, maintenance, and replacement projects in mind, this breaker delivers the exact specifications you need when compatibility matters as much as protection.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e Q243040\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy the 3-pole, 240V configuration matters for your system\u003c\/p\u003e\n\u003cp\u003eA 3-pole design with a 240-volt rating is essential for safeguarding circuits that use three conductors or require a common trip across all poles. This configuration is common in multi-wire branch circuits and equipment that demands synchronized shutdown, reducing the risk of backfeed and ensuring safer, more predictable protection in demanding installations.\u003c\/p\u003e \u003cp\u003eCore value and use cases\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacement in existing panels where Q243040 is the specified part, preserving original trip characteristics and mounting interfaces.\u003c\/li\u003e \u003cli\u003eRetrofit projects that require a precise 40A, 3-pole, 240V solution to match the electrical design and safety standards of your setup.\u003c\/li\u003e \u003cli\u003eMaintenance scenarios where exact part numbers streamline ordering, installation time, and panel labeling accuracy.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFitment and installation guidance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm fit and ratings before ordering—the part number Q243040 is the most reliable reference for compatibility with your panel or equipment.\u003c\/li\u003e \u003cli\u003ePower down the system and inspect the mounting cradle and bus connections prior to replacement to ensure a secure, proper connection.\u003c\/li\u003e \u003cli\u003eConsult your panel manufacturer’s documentation to verify mounting interface and trip characteristics align with this Zinsco breaker.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat you gain with the Zinsco Q243040\u003c\/p\u003e\n\u003cp\u003eConsistent, predictable protection for 240V circuits with a dedicated 40A capacity, delivered through a robust 3-pole design. This helps you maintain electrical safety, minimize downtime, and keep your electrical distribution running smoothly during both upgrades and routine maintenance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Zinsco","offers":[{"title":"Default Title","offer_id":46427399651490,"sku":"Q243040","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/zinsco-q243040-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}