{"product_id":"siemens-hjxd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HJXD63B400L - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens HJXD63B400L — a robust, bolt-on molded case circuit breaker engineered to protect your electrical distribution with precision. Rated at 400A and 600V, this 3-pole device is built to safeguard panelboards and loadcenters from overcurrent and short circuits in everyday residential, commercial, and light industrial settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact and reliable trip performance even in environments with movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection: thermal for steady overcurrent control and magnetic for fast response to short-circuit events, reducing downtime and electrical wear.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e OEM-compatible design\u003c\/strong\u003e is tailored to work with matching Siemens OEM load centers and panelboards, ensuring a clean fit and straightforward installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current versatility\u003c\/strong\u003e with a 400A rating makes it suitable for larger branch circuits and main distribution needs in both small and expanding electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e supports three-phase circuits, ideal for commercial and light-industrial power distribution while still serving demanding residential installations where three-phase service is present.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this breaker stands out: it combines a secure physical connection with a precise protective mechanism that adapts to real-world conditions. The bolt-on style isn’t just about mounting—it’s about long-term reliability in panelboards and loadcenters where space is tight and protection must be dependable year after year.\u003c\/p\u003e \u003ch3\u003eWhat you can use it for\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtecting large branch circuits in residential service panels, multi‑family dwellings, or subpanels that rely on solid, vibration-tolerant connections.\u003c\/li\u003e \u003cli\u003eServing as a main or feeder protection device in commercial or light industrial distribution where three-phase power is present.\u003c\/li\u003e \u003cli\u003eReplacing aging or worn breakers in compatible Siemens panelboards to restore consistent overcurrent and short-circuit protection.\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 HJXD63B400L\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 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600V\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\u003eFor installers and facility managers, this HJXD63B400L breaker provides a reliable, compatible upgrade path that aligns with Siemens’ panelboard ecosystems. It’s designed to deliver precise protection when you need it most, helping you maintain safe, uninterrupted electrical service across a range of building types and load profiles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349810237602,"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_d189409d-7e5d-4bdd-b0d0-c25a19fab065.png?v=1764157468","url":"https:\/\/www.ampstate.com\/products\/siemens-hjxd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}