{"product_id":"siemens-mbk150a-150a-240v-plug-in-circuit-breaker","title":"Siemens MBK150 A - 150 A, 240 V Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens MBK150A — a 150 A, 240 V plug-in molded case circuit breaker designed to safeguard your electrical system with precision and speed. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, it’s a plug‑in solution that minimizes downtime and makes upgrades straightforward.\u003c\/p\u003e \u003ch2\u003eWhy the MBK150A stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless replacements in Siemens panelboards and load centers, reducing service time during upgrades or repairs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a wide range of loads and conditions, helping prevent nuisance trips while guarding against damaging faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑level compatibility\u003c\/strong\u003e designed to fit matching Siemens load centers and panelboards, ensuring proper fit, bus connection alignment, and coordinated protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current protection\u003c\/strong\u003e with a 150 A rating and 240 V operation, ideal for larger branch circuits, feeders, and subpanels in residential, commercial, and light industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable plug-in mounting\u003c\/strong\u003e supports easier service, faster maintenance, and cleaner panel organization without compromising safety or performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTargeted use-case versatility\u003c\/strong\u003e suited for main distribution in subpanels or as a robust branch‑circuit protector within mixed-use facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e MBK150A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 150 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal applications and practical benefits\u003c\/h2\u003e\n\u003cp\u003eWhether you’re outfitting a residential subpanel, upgrading a commercial panelboard, or designing a light-industrial distribution system, the MBK150A delivers dependable protection where it matters most. Its plug-in design makes it easier to inventory, stock, and deploy spare breakers for fast restorations after faults. The thermal-magnetic trip mechanism provides predictable performance under varying loads, reducing unexpected outages during peak demand or fault conditions.\u003c\/p\u003e \u003cp\u003eWhy choose this Siemens breaker over alternatives? It’s built to align with Siemens OEM load centers, ensuring precise mechanical fit and coordinated tripping behavior. That means fewer compatibility concerns, fewer modifications, and a cleaner, safer electrical distribution system. And with a straightforward 150 A, 240 V specification, it’s well-suited for mid-to-large branch circuits and feeder protection in a variety of settings.\u003c\/p\u003e \u003cp\u003ePractical tips for best results: confirm your panelboard model is designed for plug-in MBK breakers, keep spares on hand for quick swaps, and replace a breaker only with the same part number or an OEM-approved equivalent to maintain trip coordination and warranty validity. For maintenance, visually inspect for signs of arcing or discoloration during routine panel checks, and schedule professional inspection if any irregularities are observed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355133431970,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_96a8b62e-3fd4-41a8-ac45-729e29efc9b9.png?v=1764689493","url":"https:\/\/www.ampstate.com\/products\/siemens-mbk150a-150a-240v-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}