{"product_id":"square-d-qob3701021-70a-3p-240v-circuit-breaker","title":"Square D QOB3701021 70A 3P 240V Circuit Breaker, Bolt-On, Shunt Trip | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QOB3701021 - a dependable 70 A, 3-pole, 240 V bolt-on circuit breaker with shunt trip designed for everyday electrical work. Built to protect panelboards, load centers, and electrical distribution networks, it keeps your system safe and compliant while simplifying replacement in retrofit projects.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e70 Amp, 3-Pole, 240 Volt\u003c\/strong\u003e rating ensures robust protection for multiwire circuits and feeders.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-On mounting\u003c\/strong\u003e provides solid, quick installation in compatible Square D panelboards and distribution panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eShunt Trip\u003c\/strong\u003e capability enables remote disconnection through an external control circuit for enhanced safety and emergency isolation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart of the Square D QOB family\u003c\/strong\u003e with proven performance in retrofit and maintenance planning where part-number consistency matters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable compatibility\u003c\/strong\u003e for panelboards, load centers, and electrical distribution setups needing a trusted 70 A breaker.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eKey use cases and benefits:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRetrofit projects: keep the same part number (QOB3701021) across aging panels to reduce inventory complexity and downtime.\u003c\/li\u003e \u003cli\u003eMaintenance planning: stock and swap in the same model when scheduled service is on the horizon.\u003c\/li\u003e \u003cli\u003eRemote control and safety: integrated shunt trip supports code-compliant emergency isolation in protected circuits.\u003c\/li\u003e \u003cli\u003eElectrical distribution: suitable for feeders and branch circuits in commercial or industrial environments requiring 240 V 3-pole protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation and compatibility notes:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eDesigned for bolt-on installation in compatible panelboards and load centers from Square D. Before purchase, verify that your enclosure accepts QOB-series breakers and that the bus configuration supports a 3-pole, 240 V shunt-trip device. If you need help confirming fit or part-number compatibility, AmpState is ready to assist—message us and we’ll confirm the right fit for your system.\u003c\/p\u003e \u003cp\u003eWith AmpState, you’re getting a trusted source for essential electrical components. The Square D QOB3701021 is a purpose-built solution for reliable circuit protection, retrofits, and long-term maintenance planning—delivering predictable performance when it matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410869670050,"sku":"QOB3701021","price":1793.0,"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-qob3701021-70a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}