{"product_id":"general-electric-mb133-circuit-breaker","title":"General Electric | MB133 | Circuit Breaker | 150A | 3-Pole | 277V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the General Electric MB133 circuit breaker — a purpose-built solution for reliable overcurrent protection in commercial and industrial electrical systems. Designed for 150A, 3-pole operation at 277V, this unit is tailored for three-phase circuits, making it a precise fit for maintenance, retrofit, and replacement projects where exact specifications matter.\u003c\/p\u003e \u003ch3\u003eWhy choose the GE MB133\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise compatibility\u003c\/strong\u003e: The MB133 part number is the best reference for ensuring your replacement matches your GE panels and system requirements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection\u003c\/strong\u003e: 3-pole design delivers balanced protection across all phases in 277V environments, helping safeguard motors, lighting, and other 277V equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear electrical rating\u003c\/strong\u003e: 150A uninterrupted operating capacity provides dependable protection for circuits with higher current demands.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesigned for retrofit and maintenance\u003c\/strong\u003e: A straightforward replacement option when servicing legacy GE setups or upgrading existing infrastructure.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 150A\u003c\/li\u003e \u003cli\u003ePoles: 3-Pole\u003c\/li\u003e \u003cli\u003eVoltage: 277V\u003c\/li\u003e \u003cli\u003ePart number \/ model: MB133\u003c\/li\u003e \u003cli\u003eManufacturer: General Electric (GE)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and ideal applications\u003c\/h3\u003e\n\u003cp\u003eBest suited for commercial and industrial panels that require consistent three-phase protection at 277V. It’s an excellent choice for retrofit projects where older GE equipment needs a like-for-like replacement, or for maintenance stock to minimize downtime during service events. Whether powering motor drives, HVAC equipment, or lighting circuits in a three-phase distribution setup, the MB133 provides reliable, spec-aligned performance.\u003c\/p\u003e \u003ch3\u003eHow this part fits into your workflow\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBefore you order\u003c\/strong\u003e: Confirm fit and ratings against your panel labeling and service blueprints. The MB133 is purpose-built; matching this exact reference helps ensure safe, compliant operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDuring installation\u003c\/strong\u003e: Follow standard electrical safety practices and ensure the circuit is de-energized. Verify that the panel’s bus configuration and wiring match the 3-pole, 277V specification.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePost-install tips\u003c\/strong\u003e: After replacement, perform a functional test to confirm proper tripping behavior and verify that downstream equipment operates as intended without nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the GE MB133 for a dependable, spec-accurate replacement that aligns with GE systems and three-phase 277V applications. It’s a focused, practical part designed to keep critical electrical infrastructure running smoothly and safely.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"General Electric","offers":[{"title":"Default Title","offer_id":46426278887586,"sku":"MB133","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/general-electric-mb133-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}