{"product_id":"zinsco-ubiz250b-circuit-breaker","title":"Zinsco | UBIZ250B | Circuit Breaker | 50A | 2-Pole | 240V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Zinsco UBIZ250B circuit breaker — a 50-amp, 2-pole, 240-volt bolt-on protection device designed for reliable control of high-demand 240V circuits. Built for maintenance, retrofit, and replacement projects where exact specs matter, this unit pairs with Zinsco panels that require bolt-on mounting and 2-pole construction.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 50A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e UBIZ250B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Zinsco\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this matters\u003c\/h3\u003e\n\u003cp\u003eIn 240V circuits — like large HVAC units, water heaters, or electric ranges — reliable, consistent protection is critical. The UBIZ250B delivers precise tripping characteristics at 50A, ensuring your system stays safeguarded without nuisance trips on startup surges. The two-pole design ensures both legs are switched, maintaining safety and protecting appliances on both hot wires.\u003c\/p\u003e \u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacement for compatible Zinsco panels requiring bolt-on, 2-pole 50A 240V protection\u003c\/li\u003e \u003cli\u003eRetrofit projects where a direct UBIZ250B match is needed for service upgrades\u003c\/li\u003e \u003cli\u003eMaintenance swaps to refresh aging protection on 240V circuits\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation notes\u003c\/h3\u003e\n\u003cp\u003eAlways confirm fit and ratings before ordering. The part number UBIZ250B is the best reference for compatibility with your panel. Since bolt-on breakers vary by model family, match the exact number to your panel's design and labeling.\u003c\/p\u003e \u003ch3\u003eWhat sets UBIZ250B apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDirect bolt-on mounting for a secure, vibration-resistant connection that resists loose connections over time\u003c\/li\u003e \u003cli\u003e2-pole construction ensures simultaneous disconnection of both hot legs, improving safety\u003c\/li\u003e \u003cli\u003eClear, 240V duty capability for demanding residential or light commercial loads\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for optimal performance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eKeep the panel interior clean and dry; handle the breaker with care to avoid bending terminals\u003c\/li\u003e \u003cli\u003eIf you notice signs of wear, such as loosening or inconsistent trips, replace promptly rather than attempting field repairs\u003c\/li\u003e \u003cli\u003eStore replacement UBIZ250B units in a controlled environment to prevent corrosion before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Zinsco","offers":[{"title":"Default Title","offer_id":46426824442018,"sku":"UBIZ250B","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/zinsco-ubiz250b-circuit-breaker-50a-2-pole-240v-bolt-889.webp?v=1789629124","url":"https:\/\/www.ampstate.com\/products\/zinsco-ubiz250b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}