{"product_id":"siemens-lgb3b040b-40a-3p-600v-circuit-breaker","title":"Siemens LGB3B040B 40A 3P 600V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003eThe Siemens LGB3B040B is a rugged 40A, 3-pole, 600V bolt-on circuit breaker designed to protect your electrical distribution system with precision. Built for everyday use in panelboards, load centers, and distribution panels, this unit is an ideal choice for retrofit work and ongoing maintenance where keeping the same part number matters. \u003cstrong\u003eKey features and why they matter\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e provides a secure, straightforward installation that simplifies replacements and reduces field wiring time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40 Amp, 3-pole configuration\u003c\/strong\u003e supports three-phase circuits, making it suitable for commercial and light industrial loads while delivering consistent protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V rating\u003c\/strong\u003e ensures compatibility with common medium-voltage distribution needs and safe operation in standard electrical environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePanelboard, load center, and distribution protection\u003c\/strong\u003e—designed to integrate cleanly into existing Siemens systems and common electrical distribution layouts.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart-number consistency for retrofit\/maintenance\u003c\/strong\u003e—helps you match legacy installations without reconfiguring diagrams or documentation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrusted Siemens quality\u003c\/strong\u003e—backed by a long-standing reputation for reliability in demanding electrical environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cstrong\u003eWho this is for\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003eFacilities managers and maintenance technicians planning retrofit projects where the exact part number must be preserved.\u003c\/li\u003e \u003cli\u003eElectrical contractors upgrading panelboards and load centers in commercial or light industrial settings.\u003c\/li\u003e \u003cli\u003eSystems integrators consolidating protection across multi-phase distributions with dependable, easy-to-replace components.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cstrong\u003eUse cases and practical scenarios\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003eRetrofit installs: replace aging breakers without changing cabinet or trailing wiring, preserving schematics and warranty pathways.\u003c\/li\u003e \u003cli\u003eNew installations in Siemens-compatible panelboards and distribution panels that require reliable 3-phase protection.\u003c\/li\u003e \u003cli\u003eMaintenance planning: stock a matching LGB3B040B to minimize downtime when a 3P 40A breaker is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cstrong\u003eInstallation and compatibility tips\u003c\/strong\u003e\n\u003cul\u003e \u003cli\u003eVerify that your panelboard or distribution panel is designed to accept the LGB3B series bolt-on breakers and that the 600V rating matches your system.\u003c\/li\u003e \u003cli\u003eKeep a spare LGB3B040B on hand for planned maintenance so downtime is minimized during routine servicing.\u003c\/li\u003e \u003cli\u003eWhen ordering, reference the exact part number LGB3B040B to ensure seamless compatibility with existing Siemens equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eAvailable from AmpState, the Siemens LGB3B040B brings dependable protection to your three-phase circuits while simplifying retrofit projects and maintenance planning. If you’re aligning a specific part number with an established panel setup, this bolt-on 40A, 3P, 600V breaker is engineered to fit and perform where it matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412384501922,"sku":"LGB3B040B","price":1349.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.ampstate.com\/products\/siemens-lgb3b040b-40a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}