{"product_id":"siemens-hhjd63b400l-circuit-breaker","title":"Siemens | HHJD63B400L | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the reliable Siemens HHJD63B400L circuit breaker — a rugged, purpose-built protection device designed for demanding three‑phase power systems. With a 400 A rating, 3‑pole configuration, and a 600 V operating voltage, this unit is engineered to safeguard industrial panels and commercial installations where precise, match‑to‑spec compatibility matters most.\u003c\/p\u003e \u003cp\u003eKey specifications at a glance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3‑pole (three‑phase)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HHJD63B400L\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this specific Siemens breaker stands out\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact compatibility reference\u003c\/strong\u003e: The part number HHJD63B400L is your most trustworthy anchor for seamless replacement or retrofit — ensuring the new breaker fits the existing panel architecture and electrical loop without guesswork.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStrategic fit for upgrades and replacements\u003c\/strong\u003e: When your system is a 600 V, three‑phase setup, this unit provides the precise protection you need to maintain performance, safety, and reliability during maintenance or modernization projects.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-grade reliability\u003c\/strong\u003e: Built by Siemens, this breaker is designed to withstand the rigors of continuous operation in environments where uptime and safety are non‑negotiable.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical use cases and installation notes\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance in existing industrial control panels that operate on 600 V three‑phase power, where a direct 400 A, 3‑pole replacement is required.\u003c\/li\u003e \u003cli\u003eRetrofit projects aimed at upgrading protection capacity or aligning with updated electrical standards while preserving panel compatibility.\u003c\/li\u003e \u003cli\u003eReplacement of a failed or outdated unit in Siemens‑installed equipment, ensuring consistent performance with the original design.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eHow to ensure a precise fit before you order\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify that your panel or equipment label indicates 600 V and 400 A within a three‑pole configuration to match the HHJD63B400L specs.\u003c\/li\u003e \u003cli\u003eCross‑check the exact part number — HHJD63B400L — as the most reliable reference for compatibility and safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNote: Always confirm fit and ratings prior to purchase. Using the correct part number and configuration helps maintain electrical safety, system reliability, and uninterrupted operation across your three‑phase network.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427486716066,"sku":"HHJD63B400L","price":11009.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hhjd63b400l-circuit-breaker-400a-3-pole-600v-897.webp?v=1789730142","url":"https:\/\/www.ampstate.com\/products\/siemens-hhjd63b400l-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}