{"product_id":"siemens-nr423-100a-3p-240v-safety-switch","title":"Siemens NR423 100A 3P 240V Safety Switch, NEMA 3R, Fusible | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens NR423 is a robust 100 A, 3-pole, 240 V safety switch designed for reliable equipment disconnect and isolation right at the point of use. Built with retrofit workflows in mind, it preserves a consistent part number for smoother maintenance planning and faster spares ordering, so downtime is minimized and service crews stay in sync.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 100 A, 240 V\u003c\/strong\u003e configuration suits medium-size, three-phase equipment loads while keeping a compact footprint for control rooms, switchgear, or outdoor installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNEMA 3R enclosure\u003c\/strong\u003e provides weather-resistant protection suitable for both indoor and outdoor environments, guarding against rain and indirect exposure while keeping electrical connections secure.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible design\u003c\/strong\u003e integrates overcurrent protection directly into the disconnect, enabling coordinated protection for downstream equipment and simplifying fuse replacement during maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSiemens reliability\u003c\/strong\u003e comes from a purpose-built safety switch engineered to meet industrial standards, ensuring consistent performance across environments and long service life.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSmooth retrofit and procurement\u003c\/strong\u003e with a single, recognizable part number (NR423) helps maintain consistency across facilities and reduces compatibility questions during upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this NR423 safety switch matters in real-world setups\u003c\/h3\u003e\n\u003cp\u003eWhen you need an accessible, code-compliant equipment disconnect at the point of use, the NR423 delivers a straightforward solution that aligns with maintenance schedules and compliance checklists. Its fusible protection is ideal for systems where selective coordination and replaceable fuses are preferred, such as controlled HVAC loops, motor loads, and line-side disconnects for industrial equipment.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEquipment disconnects for three-phase motors and driven loads\u003c\/li\u003e \u003cli\u003eRetrofit projects where maintaining a consistent part number simplifies stocking and service planning\u003c\/li\u003e \u003cli\u003eOutdoor or semi-enclosed installations requiring a weather-resistant enclosure\u003c\/li\u003e \u003cli\u003eMaintenance planning that benefits from straightforward fuse replacement and clear protection paths\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility notes\u003c\/h3\u003e\n\u003cp\u003eDesigned to integrate into existing Siemens-based systems, the NR423 helps streamline upgrades and spares management. If you’re matching a part number or confirming compatibility for a retrofit, AmpState is available to assist with fitment and system alignment—ensuring your safety switch works seamlessly with current gear and wiring schemes.\u003c\/p\u003e \u003cp\u003eAvailable from AmpState, the Siemens NR423 100 A 3P 240 V safety switch combines dependable protection, practical retrofit benefits, and a rugged NEMA 3R enclosure to keep critical equipment isolated and secure—not just during routine maintenance, but whenever you need a reliable point-of-use disconnect.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46411059953826,"sku":"NR423","price":10.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/siemens-nr423-100a-3p-240v-safety-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}