{"product_id":"siemens-ngb1b040b-40a-347v-1-pole-bolt-on-circuit-breaker","title":"Siemens NGB1B040B - 40 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens NGB1B040B is a dependable, single-pole bolt-on circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. With a 40A rating and a 347V maximum, it’s built to handle typical commercial and residential distribution needs while delivering consistent performance in diverse environments.\u003c\/p\u003e \u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection for long-term stability in busy electrical panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection by coordinating between overload (thermal) and short-circuit (magnetic) conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole design\u003c\/strong\u003e suited for single-phase circuits, making it ideal for branch circuits in homes, offices, and light industrial spaces.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e347V rating\u003c\/strong\u003e broadens compatibility with common commercial and industrial distribution schemes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e with matching Siemens panelboards and load centers, ensuring a seamless, code-compliant fit.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike generic replacements, the NGB1B040B is purpose-built for Siemens panelboards, delivering a precise fit and electrical characteristics that align with your system’s protection requirements. The bolt-on design minimizes connection looseness and vibration-induced trips, while the thermal-magnetic trip unit adapts to load changes, reducing nuisance trips and protecting conductors and devices downstream from damage.\u003c\/p\u003e \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential subpanels and service panels needing reliable overcurrent protection on single-phase circuits\u003c\/li\u003e \u003cli\u003eCommercial lighting and receptacle circuits that require robust protection at the distribution level\u003c\/li\u003e \u003cli\u003eLight industrial equipment circuits where compact, dependable protection is critical\u003c\/li\u003e \u003cli\u003eRetrofits or upgrades in existing Siemens electrical systems that require a compatible, bolt-on breaker\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical Snapshot\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003cbr\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e NGB1B040B\u003cbr\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003cbr\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 40A\u003cbr\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 347V\u003cbr\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 1\u003cbr\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Bolt-on\u003cbr\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/p\u003e \u003ch3\u003ePractical guidance for use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure your panelboard is a compatible Siemens OEM unit to guarantee performance parity and code compliance.\u003c\/li\u003e \u003cli\u003eUse in circuits where a single-pole, 40A protection scheme is appropriate to safeguard wiring and connected loads from overloads and short circuits.\u003c\/li\u003e \u003cli\u003eIn environments with vibration or frequent mechanical activity, rely on the bolt-on mounting to maintain a solid, long-lasting electrical connection.\u003c\/li\u003e \u003cli\u003ePair with proper conductors and enclosures per local electrical codes and Siemens installation guidelines for optimal safety and reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355137495202,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-ngb1b040b-40-a-347-v-1-pole-bolt-on-circuit-breaker-515.webp?v=1788734593","url":"https:\/\/www.ampstate.com\/products\/siemens-ngb1b040b-40a-347v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}