{"product_id":"siemens-jxd23b300-300a-240v-3-pole-bolt-on-circuit-breaker","title":"Siemens JXD23B300 - 300 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens JXD23B300 is a 300A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver robust branch-circuit overcurrent and short-circuit protection in panelboards and load centers.\u003c\/p\u003e \u003cp\u003eBuilt for reliability in demanding installations, this unit features a secure bolt-on mounting that creates a rigid, vibration-resistant bus connection, helping maintain a clean, low-impedance path for fault currents even in vibration-prone environments.\u003c\/p\u003e \u003cp\u003eIts thermal-magnetic trip unit combines precise overload sensing with rapid magnetic tripping for dependable protection that remains stable and repeatable across loads and temperatures. That means fewer nuisance trips and quicker response when a fault occurs, safeguarding wiring and equipment.\u003c\/p\u003e \u003cp\u003eDesigned to integrate seamlessly with matching OEM Siemens load centers and panelboards, the JXD23B300 ensures proper fit, accurate field coordination, and compliant performance within your existing electrical infrastructure.\u003c\/p\u003e \u003ch2\u003eKey advantages\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e maintains a rigid, vibration-resistant bus connection for durable, long-term performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e provides stable overload protection with fast short-circuit interruption for reliable, repeatable protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible:\u003c\/strong\u003e ensures seamless integration with Siemens panelboards and load centers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design at 240V:\u003c\/strong\u003e ideal for three-phase distribution systems in commercial and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e300A rating:\u003c\/strong\u003e suited for high-demand branch circuits needing substantial protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e suitable for residential, commercial, and light industrial electrical systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePractical use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eThree-phase motor feeders in small manufacturing or processing lines requiring solid protection and reliable trip performance.\u003c\/li\u003e \u003cli\u003eMain or feeder protection in commercial electrical rooms where panelboard reliability is critical.\u003c\/li\u003e \u003cli\u003eSub-panel protection for large homes or multi-tenant facilities with elevated electrical loads.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical specifications at a glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e JXD23B300\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker (MCCB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 300A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\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\u003eFor professionals who demand dependable protection and straightforward compatibility, the Siemens JXD23B300 delivers precise coordination with Siemens panelboards, robust mechanical mounting, and a proven thermal-magnetic protection profile that keeps critical circuits safe and up and running.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349815546018,"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_4bd580fc-3f88-419f-9aba-6c36aa40c9af.png?v=1764157643","url":"https:\/\/www.ampstate.com\/products\/siemens-jxd23b300-300a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}