{"product_id":"commander-qbh40-40a-120v-1-pole-bolt-on-circuit-breaker","title":"Commander QBH40 - 40 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eCommander QBH40\u003c\/strong\u003e — a 40 A, 120 V, 1-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. Designed to keep electrical systems safe and reliable, this unit combines robust mounting with precise protection to handle everyday residential, commercial, and light industrial needs.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e for a rigid, vibration-resistant bus connection that stays tight over time, reducing connection wear and maintaining consistent performance in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by responding to gradual overloads with the thermal element and delivering fast magnetic trips for short circuits, helping minimize nuisance trips while guarding downstream circuitry.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-friendly compatibility\u003c\/strong\u003e designed to work with matching Commander loadcenters and panelboards, ensuring seamless integration within established electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suited for residential, commercial, and light industrial installations—protecting 120 V branch circuits that power lighting, receptacles, and dedicated equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 40 A, 120 V configuration\u003c\/strong\u003e provides targeted protection for single hot-wire circuits in a compact, molded-case format, ideal where space and reliability matter.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable molded-case design\u003c\/strong\u003e built to endure routine panelboard maintenance and field service, maintaining performance under common electrical stresses.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the Commander QBH40\u003c\/h3\u003e\n\u003cp\u003eIf your panelboard or loadcenter calls for a bolt-on, 1-pole device with dependable branch-circuit protection, the QBH40 delivers. The combination of secure mounting, reliable thermo-magnetic trip, and OEM compatibility translates into fewer install hassles and more consistent protection across a wide range of applications. It’s the practical choice when you need a robust, service-friendly solution for 40 A circuits at 120 V.\u003c\/p\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Commander\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QBH40\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned for installers and electrical professionals seeking a dependable, easy-to-integrate solution, the Commander QBH40 helps you protect circuits with precision while maintaining compatibility across Commander’s OEM panelboard ecosystem. \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349483606178,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton_breaker_and_panels_0a07b360-5be2-4df6-b7c4-9288666c0b36.png?v=1764147900","url":"https:\/\/www.ampstate.com\/products\/commander-qbh40-40a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}