{"product_id":"siemens-hhjd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HHJD63B400L - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HHJD63B400L\u003c\/strong\u003e is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to protect panelboards and loadcenters from overcurrent and short-circuit faults with reliability and ease of maintenance.\u003c\/p\u003e \u003cp\u003eEngineered for challenging electrical environments, its secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain a solid mechanical link even in installations subject to movement or vibration. This solid connection minimizes contact resistance fluctuations that can compromise performance over time.\u003c\/p\u003e \u003cp\u003eThe built-in thermal-magnetic trip unit delivers stable, repeatable protection: the magnetic element responsive to high fault currents rapidly disengages the circuit during short circuits, while the thermal element guards against sustained overloads. The result is safer equipment operation, reduced downtime, and longer life for wiring and connected devices.\u003c\/p\u003e \u003cp\u003eDesigned for compatibility, the HHJD63B400L works with matching Siemens OEM load centers and panelboards, ensuring a seamless fit and dependable coordination with other protective devices in your electrical distribution system.\u003c\/p\u003e \u003ch3\u003eWhy this matters for your project\u003c\/h3\u003e\n\u003cp\u003eFor residential, commercial, and light industrial applications, this 3-pole breaker provides robust three-phase protection where it’s needed most. It’s ideal for upgrading existing panels, replacing worn breakers, or configuring new installations that demand reliable, code-compliant overcurrent protection across three phase conductors.\u003c\/p\u003e \u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e for a secure, vibration-resistant bus connection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip\u003c\/strong\u003e delivers stable overload and fast short-circuit disconnection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 400 A, 600 V\u003c\/strong\u003e rating suits medium to high-demand circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSiemens OEM compatibility\u003c\/strong\u003e with matching load centers and panelboards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suited for residential, commercial, and light industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: HHJD63B400L\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading a panel, configuring a new electrical rack, or safeguarding critical loads, the Siemens HHJD63B400L delivers dependable protection with a design that prioritizes secure mounting, precise trip performance, and long-term reliability in everyday electrical infrastructure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349809352866,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hhjd63b400l-400-a-600-v-3-pole-bolt-on-circuit-breaker-867.webp?v=1788731260","url":"https:\/\/www.ampstate.com\/products\/siemens-hhjd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}