{"product_id":"siemens-ngb3b040b-40a-3p-600v-circuit-breaker","title":"Siemens NGB3B040B 40A 3P 600V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens NGB3B040B\u003c\/strong\u003e is a 40 A, 3-pole, 600 V bolt-on circuit breaker engineered for dependable protection in panelboards, load centers, and electrical distribution systems.\u003c\/p\u003e\n\u003cp\u003eUse it for replacement projects and spare part stocking to keep your BOM aligned with the original Siemens part number. AmpState lists this part as available, making it easy to source when you need it most.\u003c\/p\u003e \u003ch3\u003eWhat makes this breaker stand out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e provides a secure, vibration-resistant connection and a solid mechanical fit in compatible Siemens panelboards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design\u003c\/strong\u003e protects three-phase circuits, delivering coordinated protection for industrial or commercial electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40-amp protection\u003c\/strong\u003e suited for feeder and branch circuits where robust protection is required without tripping nuisance levels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600-volt rating\u003c\/strong\u003e suitable for many industrial distribution environments, offering a safety margin for higher voltage applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOriginal part alignment\u003c\/strong\u003e helps maintain BOM integrity and service compatibility with the Siemens original equipment lineup.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number NGB3B040B\u003c\/strong\u003e ensures exact fit and electrical characteristics for replacement projects.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailability\u003c\/strong\u003e through AmpState to minimize downtime and ensure stock for critical installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cp\u003e- Replacing a failed breaker in existing Siemens panelboards and load centers – preserve original wiring diagrams and trip characteristics.\u003c\/p\u003e\n\u003cp\u003e- Building or upgrading an electrical distribution system in a commercial or light industrial setting where reliable three-phase protection is essential.\u003c\/p\u003e\n\u003cp\u003e- Keeping a spare on hand for rapid swap-outs during maintenance to reduce system downtime.\u003c\/p\u003e \u003ch3\u003eTips for compatibility and installation\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm that your panelboard supports bolt-on breakers of the NGB family and 3P 600V class; this ensures proper clearance, bus alignment, and trip performance.\u003c\/li\u003e \u003cli\u003eUse the exact part number (NGB3B040B) to maintain consistent electrical ratings and coordination with upstream\/downstream protection devices.\u003c\/li\u003e \u003cli\u003eWhen in doubt, AmpState offers assistance to verify fit and compatibility with your existing equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor dependable, industry-grade circuit protection with Siemens quality, the NGB3B040B is a reliable choice for maintaining safe, compliant electrical distribution systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410974298274,"sku":"NGB3B040B","price":1505.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-ngb3b040b-40a-3p-600v-circuit-breaker-bolt-on-ampstate-385.webp?v=1788998542","url":"https:\/\/www.ampstate.com\/products\/siemens-ngb3b040b-40a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}