{"product_id":"siemens-shjd6b400lsig-circuit-breaker","title":"Siemens | SHJD6B400LSIG | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens SHJD6B400LSIG\u003c\/strong\u003e is a high-capacity circuit breaker engineered for demanding electrical systems. With a 400A rating, 3-pole configuration, and 600V maximum, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact specs matter and compatibility is critical.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\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\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart reference:\u003c\/strong\u003e SHJD6B400LSIG — use this number as the primary compatibility guide\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrong for retrofit and replacement\u003e When upgrading or refreshing a panel, this breaker fits scenarios where matching current and pole configuration is essential, ensuring seamless integration with existing wiring and protective schemes.\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrecision compatibility:\u003c\/strong\u003e Rely on the part number SHJD6B400LSIG as the best reference for ensuring a correct fit with Siemens assemblies and matching ratings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRobust protection for high-demand circuits:\u003c\/strong\u003e The 400 A capacity supports substantial feeders and main circuits, helping to safeguard expensive equipment and maintain uptime in industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear fitment guidance:\u003c\/strong\u003e Before ordering, verify both physical fit and electrical ratings to avoid mismatches and ensure proper protection coordination within your electrical distribution system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal applications and use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance or retrofit projects in commercial buildings, factories, or data-center enclosures where a Siemens 400A, 3-pole, 600V breaker is required.\u003c\/li\u003e \u003cli\u003eReplacement of aging protection devices in service panels that demand exact amperage and pole configuration to maintain protective coordination.\u003c\/li\u003e \u003cli\u003eNew installations that follow strict spec requirements, ensuring consistent trip characteristics and reliable shutdown behavior.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for installation and care\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm fit and ratings against your panel or distribution board prior to purchase. The SHJD6B400LSIG is identified by its part number as the best compatibility reference.\u003c\/li\u003e \u003cli\u003eEngage a qualified electrician to perform installation and ensure proper securement, conductor termination, and protection coordination with adjacent devices.\u003c\/li\u003e \u003cli\u003eMaintain accurate records of part numbers and compatibility notes for future maintenance, so replacements align with your original protection scheme.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading an existing installation, replacing a failed unit, or outfitting a new build with precise protection requirements, the Siemens SHJD6B400LSIG circuit breaker delivers dependable performance, clear reference for compatibility, and the robust protection needed for high-current 600V systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426267320482,"sku":"SHJD6B400LSIG","price":176054.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-shjd6b400lsig-circuit-breaker-400a-3-pole-600v-551.webp?v=1789546905","url":"https:\/\/www.ampstate.com\/products\/siemens-shjd6b400lsig-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}