{"product_id":"siemens-b320-20a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens B320 - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens B320 — a 20A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for residential, commercial, and light industrial environments, this device combines robust construction with precise protection where it matters most.\u003c\/p\u003e \u003ch3\u003eKey advantages that keep your panels safe\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, reducing the risk of loose connections in busy electrical panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by balancing fast magnetic response for short circuits with thermal delay for sustained overloads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 20A, 240V design\u003c\/strong\u003e is ideal for 240V distribution and 3-phase or multi-wire branch circuits common in modern panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e OEM compatibility\u003c\/strong\u003e works seamlessly with matching Siemens OEM load centers and panelboards, ensuring reliable operation and easier replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this 3-pole bolt-on breaker matters in your setup\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eIn residential settings, it supports critical 240V circuits and multi-wire branch configurations with solid protection against nuisance trips caused by vibrations or loose bus connections.\u003c\/li\u003e \u003cli\u003eIn commercial environments, it helps safeguard lighting, outlets, small equipment, and control circuits that share a common bus, reducing downtime and maintenance costs.\u003c\/li\u003e \u003cli\u003eIn light industrial applications, its bolt-on design stands up to steady operation, providing consistent performance in panels that experience regular activity and vibration.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: B320\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 20A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 240V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho should consider the Siemens B320?\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHomeowners upgrading or extending 240V circuits in main or subpanels who require reliable 3-pole protection.\u003c\/li\u003e \u003cli\u003eElectrical contractors designing commercial panelboards or light industrial layouts that demand robust, vibration-resistant breakers.\u003c\/li\u003e \u003cli\u003eMaintenance teams seeking compatible, easy-to-replace components within Siemens OEM ecosystems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cp\u003ePair the B320 with the appropriate Siemens OEM panel or loadcenter to maintain optimal protection performance. Ensure circuits calling for 240V are distributed across the three poles as designed, and verify that the panel’s bus connections and mounting surface are clean and free from debris to maximize the benefits of the bolt-on interface and the thermal-magnetic trip system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349753286818,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_bc374307-ea7b-4dd8-9a46-f059f814b45d.png?v=1764155919","url":"https:\/\/www.ampstate.com\/products\/siemens-b320-20a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}