{"product_id":"siemens-b345h-45a-3p-240v-circuit-breaker","title":"Siemens B345H 45A 3P 240V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens B345H 45A 3P 240V Bolt-On Circuit Breaker—the dependable choice for everyday electrical protection in panelboards, load centers, and electrical distribution networks. Built to handle three-phase systems with precise, secure mounting, this breaker is a smart addition to any professional toolkit or spare parts inventory.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy this breaker stands out\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect part-number match\u003c\/strong\u003e: Specifically designed with the B345H designation, it’s the reliable replacement when exact Siemens compatibility matters for retrofit projects, new builds, or panel upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole, 240V protection\u003c\/strong\u003e: Ideal for three-phase circuits common in commercial and light industrial applications, delivering coordinated protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e: Provides a secure, vibration-resistant connection inside panelboards and distribution equipment, simplifying installation and reducing a common failure point.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e45 A capacity\u003c\/strong\u003e for balanced distribution and motor loads while fitting neatly into standard Siemens protection strategies for 240V systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile use for professionals\u003c\/strong\u003e: A trusted part for maintenance teams, panel builders, and service fleets who need reliable, ready-to-ship replacements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat this means in practice\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and service calls: Quickly swap in a direct-match breaker to minimize downtime when a circuit trips or a panel needs rebalancing after upgrades.\u003c\/li\u003e \u003cli\u003ePanel fabrication and retrofits: Use this 3P 240V bolt-on breaker to maintain consistent protection across newly wired or upgraded distribution systems.\u003c\/li\u003e \u003cli\u003eSpare inventory strategy: Keep a ready-to-install B345H on hand to cover 3-phase protection needs without guessing compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eSpecs at a glance: 45 A, 3 poles, 240 V, Siemens brand, bolt-on design. This component plays a critical role in circuit protection, helping maintain safe electrical distribution and reducing the risk of overloads and short circuits in everyday operations.\u003c\/p\u003e \u003cp\u003eAvailable from AmpState. Need help matching a part-number or confirming compatibility? Message us and we’ll help you confirm fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410990354594,"sku":"B345H","price":461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-b345h-45a-3p-240v-circuit-breaker-bolt-on-ampstate-breakers-377.webp?v=1789001237","url":"https:\/\/www.ampstate.com\/products\/siemens-b345h-45a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}