{"product_id":"square-d-qob3351021-35a-3p-240v-circuit-breaker","title":"Square D QOB3351021 35A 3P 240V Circuit Breaker, QO, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB3351021 — a 35 A, 3-pole, 240 V circuit breaker engineered for robust protection in panelboards, load centers, and electrical distribution systems. This QO bolt-on model delivers a secure, durable connection designed to stand up to the demands of commercial and industrial installations, making it an ideal choice for both new builds and retrofit projects.\u003c\/p\u003e \u003cp\u003eWhy this matters in real-world projects: when you’re replacing a breaker or building a spare stock, keeping the BOM aligned to the original part number minimizes compatibility surprises and speeds up maintenance. The QOB3351021 is built to fit compatible QO panelboards precisely, helping you preserve system protection without firmware-like guesswork.\u003c\/p\u003e \u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQO Bolt-On design:\u003c\/strong\u003e secure mounting in compatible panelboards and load centers for a reliable, vibration-resistant connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-pole configuration:\u003c\/strong\u003e appropriate for 240 V three-phase circuits common in many commercial and light-industrial setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e35 A rated:\u003c\/strong\u003e provides targeted overcurrent protection for feeders and branch circuits, helping prevent equipment damage and downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand and compatibility:\u003c\/strong\u003e Square D, a trusted name in electrical protection equipment, with a direct part number for easy identification (QOB3351021).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e stocked by AmpState to support efficient procurement and streamlined maintenance planning.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and benefits\u003c\/h3\u003e\n\u003cp\u003eThis breaker is ideal for replacement projects where the original QO bolt-on breaker is specified, ensuring plug-and-play compatibility with existing panelboards. Keeping a spare QOB3351021 on hand reduces downtime during routine maintenance or unexpected faults. It protects 3-pole, 240 V circuits—such as main distribution paths and multi-phase loads—across commercial facilities, helping you maintain reliable power distribution with minimal disruption.\u003c\/p\u003e \u003ch3\u003eCompatibility and support\u003c\/h3\u003e\n\u003cp\u003eIf you’re unsure about fit, AmpState offers guidance to confirm compatibility. Send a message to verify that the QOB3351021 matches your panelboard or to explore closely related Square D QO bolt-on options within the same family.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Circuit Breaker\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e QOB3351021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 35 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e QO Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e AmpState\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46411107991714,"sku":"QOB3351021","price":10.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.ampstate.com\/products\/square-d-qob3351021-35a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}