{"product_id":"siemens-sn421-30a-3p-240v-disconnect-switch","title":"Siemens SN421 Disconnect Switch, 30A, 3-Pole, 240V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens SN421 Disconnect Switch is a dependable, three-pole isolation solution designed for demanding industrial environments. With a 30 A rating and 240 V operation, this switch delivers clear, decisive electrical isolation for service, maintenance, and replacement projects, helping technicians work safely and efficiently.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\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 SN421\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Disconnect Switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 30 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this disconnect switch matters\u003c\/h3\u003e\n\u003cp\u003eIn industrial settings, reliable isolation is critical. The SN421’s three-pole configuration ensures all phases can be disconnected simultaneously, reducing the risk of stray currents during maintenance or equipment replacement. Built for durability in service environments, it supports quick, safe shutdowns without compromising performance, helping keep downtime short and crews protected.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eIndustrial electrical service installations requiring safe circuit isolation\u003c\/li\u003e \u003cli\u003eMaintenance shutdowns on heavy machinery and equipment\u003c\/li\u003e \u003cli\u003eReplacement projects where a proven, compatible disconnect switch is needed\u003c\/li\u003e \u003cli\u003ePanel upgrades or rewiring efforts that require a robust, industry-standard isolator\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and support\u003c\/h3\u003e\n\u003cp\u003eNotes: Verify fit by part number and application requirements. The SN421 is the specified disconnect switch for applications that match its 30 A, 3-pole, 240 V configuration.\u003c\/p\u003e\n\u003cp\u003eNeed help matching a part number or confirming compatibility? Message us and we'll help.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46415997042850,"sku":"SN421","price":460.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_513d6710-3734-4b27-839d-f68e6f4b470a.png?v=1765492974","url":"https:\/\/www.ampstate.com\/products\/siemens-sn421-30a-3p-240v-disconnect-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}