{"product_id":"siemens-b345h-45a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens B345H - 45 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003ch2\u003eSiemens B345H 45A, 240V, 3-Pole Bolt-On Circuit Breaker\u003c\/h2\u003e \u003cp\u003eDesigned for dependable branch circuit protection, the Siemens B345H is a 45A, 240V, 3-pole molded case circuit breaker built to fit bolt-on panelboards and loadcenters. This unit delivers precise, reliable overcurrent and short-circuit protection where it’s most needed, keeping equipment safer and systems running smoothly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting for a rigid, vibration-resistant connection\u003c\/strong\u003e — ensures a secure bus connection that stays tight through equipment vibration and operation, reducing loosened contacts over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit for stable protection\u003c\/strong\u003e — combines thermal overload protection with magnetic short-circuit protection, delivering fast, repeatable trips at the correct current to safeguard downstream circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible for seamless integration\u003c\/strong\u003e — engineered to be compatible with matching Siemens OEM load centers and panelboards, facilitating straightforward installation and reliable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple settings\u003c\/strong\u003e — suited for residential, commercial, and light industrial applications where robust 3-phase protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\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 B345H\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 45A\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\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe B345H is a practical choice when upgrading or extending power distribution in panelboards and loadcenters that support bolt-on breakers. It provides predictable, maintainable protection for three-phase circuits, making it ideal for equipment like HVAC systems, motors, pumps, lighting, and other common commercial and light industrial loads.\u003c\/p\u003e \u003cp\u003eWhat makes this breaker stand out is its combination of secure installation, reliable trip performance, and seamless OEM compatibility. When you need a dependable 3-pole solution that fits cleanly into Siemens-compatible panels, the B345H delivers a straightforward path to safer, more resilient electrical distribution.\u003c\/p\u003e \u003cp\u003eInstallation tips: ensure your panelboard accepts bolt-on breakers and follow standard torque specifications for the mounting screws to maintain a solid bus connection. Regularly inspect connections for signs of wear or arcing, and reset or test the trip unit per your maintenance practices to keep protection in peak condition.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349754794146,"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_639b6c9c-e015-4d32-b02f-e8d77281d6e6.png?v=1764155950","url":"https:\/\/www.ampstate.com\/products\/siemens-b345h-45a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}