{"product_id":"siemens-b340h-40a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens B340H - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B340H is a robust 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection for your electrical panels. With a 40A rating and 240V operation, it’s built to handle standard three‑phase loads while maintaining precise, repeatable protection in demanding environments.\u003c\/p\u003e \u003ch2\u003eWhy the Siemens B340H stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e for a rigid, vibration‑resistant bus connection that stays reliable even in equipment that experiences movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e combines thermal overload protection with magnetic trip for instantaneous response to short circuits, delivering stable protection without nuisance tripping.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑class compatibility\u003c\/strong\u003e designed to work seamlessly with matching Siemens load centers and panelboards, ensuring consistent trip characteristics and easy replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple sectors\u003c\/strong\u003e ideal for residential, commercial, and light industrial panelboards and loadcenters where dependable overcurrent protection is essential.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable, molded‑case construction\u003c\/strong\u003e built to endure ongoing electrical demands while providing predictable performance over the life of the installation.\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 B340H\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use scenarios\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eThree‑phase residential or light commercial panels where 240V equipment and motors require reliable protection.\u003c\/li\u003e \u003cli\u003ePanels in environments with moderate vibration or movement, where bolt‑on mounting helps maintain a solid bus connection.\u003c\/li\u003e \u003cli\u003eRetrofit or upgrade projects needing a compatible, OEM‑matched breaker to preserve established electrical characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePractical tips and considerations\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePair the B340H with Siemens load centers and panelboards to ensure consistent trip curves and optimum protection.\u003c\/li\u003e \u003cli\u003eFollow manufacturer torque specifications for the bolt‑on connections to maintain the integrity of the bus connection and prevent loosening over time.\u003c\/li\u003e \u003cli\u003eUse the thermal element for predictable long‑term protection and rely on the magnetic trip for immediate response during short‑circuit events, reducing damage to wiring and devices.\u003c\/li\u003e \u003cli\u003eConsider the 40A rating in your design to accommodate typical motor starts and other 3‑phase loads while preserving upstream protection coordination.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Siemens B340H 40A 240V 3‑pole bolt‑on circuit breaker for dependable, industry‑standard protection that integrates cleanly into panelboards and loadcenters you already rely on. It’s a purpose‑built solution for stable, code‑compliant overcurrent protection across residential, commercial, and light industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349754564770,"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_bd080ad3-5799-4d54-b33d-bee13b98a14a.png?v=1764155944","url":"https:\/\/www.ampstate.com\/products\/siemens-b340h-40a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}