{"product_id":"square-d-q1b370-circuit-breaker","title":"Square D | Q1B370 | Circuit Breaker | 70A | 3-Pole | 240V | 10kA | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D Q1B370—a purpose-built bolt-on circuit breaker designed to deliver dependable protection for three‑phase systems. With 70A capacity, 3 poles, and 240V operation, this device is crafted for maintenance, retrofit, and replacement projects where exact compatibility matters. The bolt‑on design delivers a secure, rigid connection ideal for demanding commercial and industrial panels, ensuring you won’t sacrifice reliability during critical faults.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 70A\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\u003eInterrupting Rating:\u003c\/strong\u003e 10kA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e Q1B370\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this design matters in real-world use:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure Bolt-On Mounting:\u003c\/strong\u003e The bolt-on format provides a robust, vibration‑resistant installation that stays put in demanding environments, reducing the risk of loose connections over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-Phase Protection:\u003c\/strong\u003e A 3‑pole configuration is ideal for three-phase loads common in motors, compressors, and HVAC equipment, delivering coordinated, balanced protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStrong Short‑Circuit Protection:\u003c\/strong\u003e A 10kA interrupting capacity ensures rapid, reliable shutdown during fault conditions at 240V, helping safeguard downstream equipment and wiring.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExact Compatibility:\u003c\/strong\u003e The Q1B370 designation is your best reference for matching fit with legacy Square D panels that require bolt-on, 3‑pole breakers.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal applications include:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMaintenance outages and component refreshes in commercial or industrial electrical panels\u003c\/li\u003e \u003cli\u003eRetrofits where older bolt-on breakers are specified or required\u003c\/li\u003e \u003cli\u003eReplacement of worn or damaged 70A, 3‑pole breakers in three-phase distribution systems\u003c\/li\u003e \u003cli\u003eNew circuits for heavy‑duty loads that operate at 240V and demand reliable overcurrent protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eImportant compatibility notes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eConfirm fit and ratings before ordering.\u003c\/strong\u003e Part number Q1B370 is the most reliable reference for compatibility.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePanel compatibility:\u003c\/strong\u003e This is a bolt-on breaker designed for panels that accept bolt-on devices—verify your electrical enclosure labeling and manufacturer guidance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProfessional installation recommended:\u003c\/strong\u003e To ensure safe operation and code compliance, have a licensed electrician install or verify the breaker in your distribution panel.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompared to other form factors, this Square D bolt-on breaker is specifically suited for legacy or retrofitted systems where secure mounting and precise three‑phase protection are required. It combines the known reliability of Square D with a fit that’s purpose-built for maintenance and upgrade projects, helping you keep critical equipment protected and outages minimized.\u003c\/p\u003e \u003cp\u003eSecure protection for your three-phase load with the Square D Q1B370. A precise fit, durable bolt-on mounting, and solid interrupting capacity make it a practical choice for upgrading or maintaining your electrical distribution with confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46424384536738,"sku":"Q1B370","price":310.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-q1b370-circuit-breaker-70a-3-pole-240v-10ka-bolt-571.webp?v=1789348695","url":"https:\/\/www.ampstate.com\/products\/square-d-q1b370-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}