{"product_id":"siemens-hhjxd63b400-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HHJXD63B400 - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens HHJXD63B400 is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker engineered to protect branch circuits in panelboards and loadcenters. Its bolt-on mounting delivers a rigid, vibration-resistant bus connection, helping maintain solid electrical contact even in demanding installations.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eSecure bolt-on mounting\u003c\/b\u003e provides a dependable, vibration-resistant connection to the bus bars, reducing movement and arcing over time.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThermal-magnetic trip unit\u003c\/b\u003e combines precise overload protection with fast short-circuit response, delivering stable, repeatable protection performance across varying temperatures.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOEM-compatible design\u003c\/b\u003e is built to pair with matching Siemens load centers and panelboards, making upgrades, replacements, and retrofits straightforward and reliable.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVersatile installation\u003c\/b\u003e suited for residential, commercial, and light industrial applications where robust, coordinated protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: HHJXD63B400\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 \u003ch3\u003eOptimal use cases\u003c\/h3\u003e\n\u003cp\u003eIdeal for protecting distribution circuits in panelboards and loadcenters that service three-phase systems. Use this breaker when you need to handle higher current for commercial spaces, light industrial equipment, or upgraded residential panels that feed multiple 3-phase loads. It’s well-suited for applications such as service panels in small offices, retail environments, or HVAC and motor feeders where reliable, coordinated protection is critical.\u003c\/p\u003e \u003ch3\u003eInstallation and guidance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure proper alignment with the bus bars and secure the bolt-on mounting to achieve the intended, vibration-resistant connection.\u003c\/li\u003e \u003cli\u003eFollow all applicable electrical codes and Siemens installation guidelines. Use correct torque for mounting screws and verify fit with compatible OEM panelboards.\u003c\/li\u003e \u003cli\u003eSince this is a 3-pole device rated for 400 A at 600 V, confirm that your panelboard and downstream circuits are sized to safely accommodate this capacity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Siemens HHJXD63B400, AmpState provides a robust, purpose-built solution for reliable branch circuit protection in demanding panelboard environments. When you need a trustworthy, OEM-compatible 3-pole bolt-on breaker that delivers consistent performance across a range of installations, this unit is engineered to meet the challenge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349809483938,"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_2571849f-ac13-45c7-8009-1127a1ebb4a0.png?v=1764157440","url":"https:\/\/www.ampstate.com\/products\/siemens-hhjxd63b400-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}