{"product_id":"general-electric-mb123-circuit-breaker","title":"General Electric | MB123 | Circuit Breaker | 150A | 3-Pole | 480V | Plug-In","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the General Electric MB123 Circuit Breaker — a plug-in, 3-pole protection solution built for 480V three-phase systems. Designed for maintenance, retrofit, and replacement, this breaker helps you keep critical electrical infrastructure running with minimal downtime and precise compatibility.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 150A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-In:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this MB123 matters for your installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eFast, straightforward swaps in compatible GE panels thanks to the plug-in design — ideal when downtime is costly.\u003c\/li\u003e \u003cli\u003eStrong alignment with three-phase, 480V service environments, providing dependable overcurrent protection for mid-to-large electrical feeders.\u003c\/li\u003e \u003cli\u003ePart number MB123 as the primary compatibility reference, ensuring you’re selecting the exact model for your panel configuration.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRoutine maintenance on GE switchgear and distribution panels that require a 150A, 3-pole, 480V plug-in breaker.\u003c\/li\u003e \u003cli\u003eRetrofits where a like-for-like replacement is needed to restore original protection characteristics.\u003c\/li\u003e \u003cli\u003eRepairs after a fault or nuisance tripping that necessitates swapping to a trusted, GE-branded component.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eImportant compatibility notes\u003c\/h3\u003e\n\u003cp\u003eThe part number MB123 is your best compatibility reference. Before ordering, confirm that your panel is designed for a 3-pole, 480V plug-in breaker with the same form factor. Using the MB123 in panels outside of this specification can compromise protection and performance.\u003c\/p\u003e \u003ch3\u003eInstallation and safety tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways de-energize and lock out the circuit before attempting installation or replacement.\u003c\/li\u003e \u003cli\u003eVerify voltage, pole configuration, and panel compatibility against the MB123 specifications.\u003c\/li\u003e \u003cli\u003eFollow best practices for electrical work and consult a licensed electrician if you’re unsure about panel compatibility or safe handling.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUpgrade or replace with confidence using the General Electric MB123 Circuit Breaker — a precise, purpose-built solution for 150A, 3-Pole, 480V plug-in protection in your GE panel ecosystem.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":46426689765538,"sku":"MB123","price":152.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/general-electric-mb123-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}