{"product_id":"siemens-jkl2b400-400a-3p-600v-circuit-breaker","title":"Siemens JKL2B400 400A 3P 600V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens JKL2B400 is built for everyday electrical work, delivering dependable circuit protection for panelboards, load centers, and distributed electrical systems. This 400 A, 3-pole breaker is designed to handle demanding loads in commercial and light industrial environments while keeping your electrical distribution organized and safe.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: JKL2B400\u003c\/li\u003e \u003cli\u003eProduct Type: Circuit Breaker\u003c\/li\u003e \u003cli\u003eAmperage: 400 A\u003c\/li\u003e \u003cli\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eVoltage: 600 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWhat makes the JKL2B400 essential for retrofit and maintenance projects is its fixed part number. When you’re updating or expanding an existing installation, sticking with a consistent part number prevents compatibility surprises and reduces downtime during replacements. Built for reliable performance, this Siemens breaker integrates smoothly into standard panelboards and load centers, supporting stable distribution across three phases at up to 600 volts.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRetrofit projects where part-number consistency is critical to avoid mismatch and re-engineering\u003c\/li\u003e \u003cli\u003eMaintenance planning for aging panels in commercial facilities\u003c\/li\u003e \u003cli\u003eProtection of multiphase distribution circuits in 600V systems\u003c\/li\u003e \u003cli\u003eReplacement in panelboards and load centers that require robust 400 A, 3-pole protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and support\u003c\/h3\u003e\n\u003cp\u003eNeed help matching a part number or confirming compatibility with your panel? AmpState offers support to verify fit and ensure you’re selecting the right breaker for your specific configuration. This item is available from AmpState, making it easy to source and stock for ongoing maintenance schedules.\u003c\/p\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePlan maintenance around a fixed part number to streamline inventory and reduce the risk of de‑rating or replacement delays.\u003c\/li\u003e \u003cli\u003eFor retrofits, confirm that your panelboard or load center supports a 400 A, 3-pole 600 V breaker of the JKL series to ensure seamless operation.\u003c\/li\u003e \u003cli\u003eStore replacement breakers where accessibility is prioritized to minimize disruption during service windows.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412837093538,"sku":"JKL2B400","price":10.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-jkl2b400-400a-3p-600v-circuit-breaker-ampstate-breakers-984.webp?v=1789029797","url":"https:\/\/www.ampstate.com\/products\/siemens-jkl2b400-400a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}