{"product_id":"siemens-hhld63b400-circuit-breaker","title":"Siemens | HHLD63B400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HHLD63B400\u003c\/strong\u003e circuit breaker delivers robust, reliable protection for three-phase electrical systems. With a 400A current rating, a 3-pole configuration, and a 600V maximum voltage, it’s built to handle demanding industrial environments where precise specifications matter.\u003c\/p\u003e \u003cp\u003eDesigned for maintenance, retrofit, and replacement projects, this Siemens breaker helps ensure your panel, feeders, and distribution network stay aligned with your system’s true ratings. The \u003cstrong\u003epart number HHLD63B400\u003c\/strong\u003e is your best reference for compatibility—always verify fit and ratings before ordering.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole (three-phase protection)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HHLD63B400\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise compatibility:\u003c\/strong\u003e Rely on the official part number (HHLD63B400) to match your panel catalog and existing wiring configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-grade durability:\u003c\/strong\u003e Built to endure continuous operation in demanding environments common to commercial and light-industrial facilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStreamlined maintenance and retrofits:\u003c\/strong\u003e A standard Siemens footprint helps simplify upgrades, replacements, and inventory management.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEnhanced protection for 3-phase systems:\u003c\/strong\u003e The 3-pole design is ideal for distributing balanced protection across three live conductors.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and servicing of aging or out-of-spec panels that require a like-for-like 400A, 3-pole, 600V breaker.\u003c\/li\u003e \u003cli\u003e Retrofit projects to upgrade capacity or restore performance in industrial electrical feeders.\u003c\/li\u003e \u003cli\u003e Replacement scenarios where the existing equipment matches the HHLD63B400 specifications and footprint.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eBuying tips and compatibility reminders\u003c\/h3\u003e\n\u003cp\u003eBefore purchasing, confirm the fit and ratings against your current equipment. Use the \u003cstrong\u003eHHLD63B400\u003c\/strong\u003e part number as the primary compatibility reference, and cross-check with your panel’s catalog or service documentation. Ensure the system voltage, current rating, and three-pole configuration align with your installation to maintain safety and performance.\u003c\/p\u003e \u003cp\u003eIn short, the Siemens HHLD63B400 is purpose-built for reliable, upgrade-friendly protection in 3-phase 600V environments, offering a precise, compatible solution for maintenance, retrofit, and replacement needs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46424502861986,"sku":"HHLD63B400","price":10516.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hhld63b400-circuit-breaker-400a-3-pole-600v-217.webp?v=1789373426","url":"https:\/\/www.ampstate.com\/products\/siemens-hhld63b400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}