{"product_id":"zinsco-qb30-circuit-breaker","title":"Zinsco | QB30 | Circuit Breaker | 30A | 1-Pole | 120V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eDesigned for Zinsco panels, the Zinsco QB30 is a 30-amp, 1-pole, 120-volt bolt-on circuit breaker built to deliver dependable overcurrent protection in retrofit and replacement projects. Identified by the part number QB30, this breaker ensures exact compatibility in maintenance tasks where matching specs matters.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 30A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIdentification:\u003c\/strong\u003e Part number QB30 is the primary compatibility reference\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy it matters for your electrical upgrades\u003c\/h3\u003e\n\u003cp\u003eWhen you're upgrading or replacing breakers in a Zinsco panel, exact spec matching is critical for safe operation and panel performance. The QB30 bolt-on design provides a secure mechanical connection that aligns with Zinsco panels designed for bolt-on style breakers, helping maintain proper trip response and electrical clearance.\u003c\/p\u003e \u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance replacements in existing Zinsco panels that require 30A protection on a 1-pole, 120V circuit\u003c\/li\u003e \u003cli\u003eRetrofits within service panels that mandate bolt-on mounting and QB30 compatibility\u003c\/li\u003e \u003cli\u003eRepairs in facilities where matching the original part number ensures proper fit and compatibility considerations\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and ordering notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm the breaker’s fit and ratings against your panel labeling. Rely on the QB30 part number as the best reference for compatibility with Zinsco systems. If the panel requires a bolt-on breaker of this specification, the QB30 is designed to install in accordance with standard Zinsco bolt-on configurations.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Installation should be performed by a licensed electrician following local electrical codes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Zinsco","offers":[{"title":"Default Title","offer_id":46426842071202,"sku":"QB30","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/zinsco-qb30-circuit-breaker-30a-1-pole-120v-bolt-739.webp?v=1789632429","url":"https:\/\/www.ampstate.com\/products\/zinsco-qb30-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}