{"product_id":"zinsco-r3840-circuit-breaker","title":"Zinsco | R3840 | Circuit Breaker | 2-Pole | 240V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Zinsco \u003cstrong\u003eR3840\u003c\/strong\u003e, a purpose-built \u003cstrong\u003e2-pole\u003c\/strong\u003e \u003cstrong\u003e240V\u003c\/strong\u003e circuit breaker designed to deliver dependable protection for your 240V circuits. This unit is the right choice for \u003cem\u003emaintenance\u003c\/em\u003e, \u003cem\u003eretrofit\u003c\/em\u003e, and \u003cem\u003ereplacement\u003c\/em\u003e projects where exact specifications matter, and where the part number \u003cstrong\u003eR3840\u003c\/strong\u003e serves as the strongest compatibility reference.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact spec match\u003c\/strong\u003e: The \u003cstrong\u003eR3840\u003c\/strong\u003e part number is your best reference for compatibility with Zinsco panels and associated bus and trip characteristics.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTwo hot legs, one safety path\u003c\/strong\u003e: The \u003cstrong\u003e2-pole\u003c\/strong\u003e design interrupts both energized conductors together, ensuring complete disconnection of a 240V circuit for safer operation of appliances like dryers, ranges, water heaters, or EV charging circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e240V protection\u003c\/strong\u003e: Specifically rated for \u003cstrong\u003e240V\u003c\/strong\u003e circuits, providing appropriate interrupting capability and coordination within compatible panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance-friendly retrofit\u003c\/strong\u003e: Ideal when upgrading an older panel or replacing a failing breaker, provided the panel accepts Zinsco \u003cem\u003eR-series\u003c\/em\u003e 2-pole breakers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQuality fit\u003c\/strong\u003e: Before ordering, verify fit and ratings on the panel label; the \u003cstrong\u003eR3840\u003c\/strong\u003e part number is the most reliable guide to compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eResidential 240V circuits such as clothes dryers, electric ranges, water heaters, or dedicated EV charging circuits in homes using Zinsco panels.\u003c\/li\u003e \u003cli\u003eRetrofits in aging electrical installations where a like-for-like replacement minimizes changes to bus bars and mounting hardware.\u003c\/li\u003e \u003cli\u003eMaintenance replacements in service panels requiring a precise \u003cstrong\u003e2-pole 240V\u003c\/strong\u003e protector that aligns with existing protective schemes.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat to know before you buy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFit and ratings\u003c\/strong\u003e: Always confirm the panel's listed compatible breaker family and that the \u003cstrong\u003eR3840\u003c\/strong\u003e’s voltage aligns with your circuit’s requirements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference\u003c\/strong\u003e: The \u003cstrong\u003eR3840\u003c\/strong\u003e part number remains the most dependable reference for matching breakers to Zinsco panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e: Power should be shut off at the main breaker, and local electrical codes followed; if you’re unsure, consult a licensed electrician before performing any replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoosing the right circuit breaker matters for reliable protection and peace of mind. The Zinsco \u003cstrong\u003eR3840\u003c\/strong\u003e \u003cstrong\u003e2-Pole\u003c\/strong\u003e \u003cstrong\u003e240V\u003c\/strong\u003e breaker is designed to align with your panel’s protection strategy, delivering dependable performance when it matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Zinsco","offers":[{"title":"Default Title","offer_id":46427399094434,"sku":"R3840","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-r3840-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}