{"product_id":"siemens-b345-45a-3p-240v-circuit-breaker","title":"Siemens B345 45A 3P 240V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B345 45A 3P 240V Bolt-On Circuit Breaker from AmpState is built to handle everyday electrical protection with precision and reliability. Designed for panelboards, load centers, and distributed electrical systems, this 3-pole breaker ensures consistent performance across three-phase circuits while keeping your BOM aligned to the original part number. It’s an excellent choice for replacement projects and stocking spares, helping you minimize downtime and keep critical equipment protected.\u003c\/p\u003e \u003ch3\u003eKey advantages that set the B345 apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e provides a secure, robust connection in compatible panels, reducing loosening under vibration and load transients.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e delivers reliable protection for 3-phase circuits, streamlining installation in commercial and industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e45 A rating\u003c\/strong\u003e offers balanced protection for medium-load electrical distributions without unnecessary nuisance tripping.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e240 V operation\u003c\/strong\u003e aligns with standard three-phase service requirements found in many panelboards and distribution setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOriginal part alignment\u003c\/strong\u003e ensures BOM fidelity, making it easier to source exact replacements that match existing installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmpState availability\u003c\/strong\u003e means you can timely acquire this Siemens breaker with confidence and support for compatibility questions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a worn or damaged breaker in panelboards and load centers where the B345 is specified.\u003c\/li\u003e \u003cli\u003eStocking a spare that directly matches the original part number to reduce downtime during maintenance windows.\u003c\/li\u003e \u003cli\u003eEnsuring consistent protection in 3-phase electrical distribution where 45 A, 3-pole 240 V devices are required.\u003c\/li\u003e \u003cli\u003eProjects aiming to maintain BOM consistency and traceability with Siemens components.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat you’ll get and how to verify compatibility\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e B345\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Circuit protection in panelboards, load centers, and electrical distribution\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNeed help matching a part number or confirming compatibility with your setup? \u003cstrong\u003eMessage us\u003c\/strong\u003e and we’ll help you confirm the fit for your panel and BOM. Upgrade your electrical protection with a trusted Siemens solution and keep your distribution system safely protected and functioning smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410916757666,"sku":"B345","price":412.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/siemens-b345-45a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}