{"product_id":"siemens-hhjxd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HHJXD63B400L - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eSiemens HHJXD63B400L is a rugged 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to safeguard large branch circuits in panelboards and load centers. Built for dependable protection in demanding environments, this unit combines a secure mechanical connection with precise electrical trip behavior to keep your systems up and running. Why this breaker stands out\n- Secure bolt-on mounting: A rigid connection to the bus bar minimizes vibration-induced loosening and ensures consistent electrical contact in panels exposed to vibration or movement.\n- Thermal-magnetic trip unit: The thermal element provides stable overload protection across temperature variations, while the magnetic element delivers instantaneous interruption during short-circuit events for immediate system protection.\n- 3-pole configuration: Ideal for 3-phase power distribution, supporting balanced protection of multi-phase equipment and loads.\n- High-current capability: 400 A rating makes it suitable for large branch circuits, feeders, and equipment in commercial and light industrial settings.\n- 600 V rating: Designed to handle typical commercial and industrial distribution requirements with reputable Siemens reliability.\n- OEM-compatible: Designed to work with matching Siemens OEM load centers and panelboards, simplifying replacements and upgrades without mismatched components.\n- Broadly applicable: Suitable for residential, commercial, and light industrial applications where robust, code-compliant overcurrent and short-circuit protection is essential. Practical use cases\n- Upgrading or replacing a failing breaker in commercial panelboards feeding high-current equipment like motor starters, pumps, or HVAC controls.\n- Installing a reliable main feeder protection in load centers that require a sturdy bolt-on solution with a compact, 3-pole form factor.\n- Refurbishing service panels in light industrial environments where consistent thermal-magnetic protection supports reliability and uptime. What you get with this unit\n- Type: Thermal-magnetic molded case circuit breaker\n- Amperage Rating: 400 A\n- Voltage Rating: 600 V\n- Number of Poles: 3\n- Mounting Style: Bolt-on\n- Application: Branch circuit overcurrent and short-circuit protection Specifications at a glance\n- Manufacturer: Siemens\n- Part Number: HHJXD63B400L\n- Category: Thermal-magnetic molded case circuit breaker\n- Compatibility: Matching OEM load centers and panelboards\n- Intended environments: Residential, commercial, and light industrial installations requiring durable, reliable overcurrent protection\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349809516706,"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_94501f8b-2c98-46db-bcaa-9bf33c5a2dc3.png?v=1764157441","url":"https:\/\/www.ampstate.com\/products\/siemens-hhjxd63b400l-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}