{"product_id":"siemens-lj63b450-450a-3p-600v-circuit-breaker","title":"Siemens LJ63B450 Circuit Breaker, 450A, 3-Pole, 600V","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for robust industrial applications, the Siemens LJ63B450 circuit breaker delivers reliable overcurrent protection for three-phase systems. With a 450 A rating and 3-pole configuration, it’s designed to safeguard heavy-duty electrical equipment in manufacturing floors, large HVAC installations, and processing lines.\u003c\/p\u003e \u003cp\u003eKey features and specifications:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 450 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand\/series:\u003c\/strong\u003e Siemens LJ63B450\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Industrial electrical service, maintenance, and replacement projects\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters for your operation:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtects wiring and connected loads from overcurrent conditions in three-phase circuits, helping prevent equipment damage and downtime.\u003c\/li\u003e \u003cli\u003eSuitable for panel upgrades or retrofits where a 3-pole, 450 A, 600 V device is required.\u003c\/li\u003e \u003cli\u003ePart of the Siemens LJ63 family, offering proven reliability and compatibility with Siemens and compatible switchgear ecosystems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations in industrial facilities that run large motors, conveyors, or presses.\u003c\/li\u003e \u003cli\u003eMaintenance replacements when the existing LJ63B450 or equivalent model reaches end-of-life.\u003c\/li\u003e \u003cli\u003ePanel upgrades to meet higher load demands while maintaining a consistent protection scheme.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompatibility and installation notes:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify fit by part number and application requirements. The LJ63B450 is specified here to ensure you’re selecting the exact device for your system.\u003c\/li\u003e \u003cli\u003eBefore purchasing, cross-check your panel data sheet and bus configurations to confirm 3-pole arrangement and 600 V compatibility.\u003c\/li\u003e \u003cli\u003eNeed help matching a part number or confirming compatibility? Message us and we’ll help.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat you can expect in practice:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eQuicker downtime recovery thanks to straightforward replacement in compatible Siemens panels.\u003c\/li\u003e \u003cli\u003eConsistent protection across three phases, reducing risk of imbalanced loads and electrical faults.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46415978397858,"sku":"LJ63B450","price":460.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-lj63b450-circuit-breaker-450a-3-pole-600v-breakers-749.webp?v=1789218613","url":"https:\/\/www.ampstate.com\/products\/siemens-lj63b450-450a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}