{"product_id":"square-d-du321rb-30a-3p-240v-safety-switch","title":"Square D DU321RB 30A 3P 240V Safety Switch, NEMA 3R, Fusible, Non-Fusible | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D DU321RB is a versatile safety switch designed to disconnect and isolate equipment right at the point of use. Built for reliable performance in demanding environments, this 30 A, 3-pole unit operates at 240 V and comes with NEMA 3R enclosure protection for dependable outdoor or recessed indoor service.\u003c\/p\u003e \u003ch2\u003eKey advantages of the DU321RB\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole, 240V protection\u003c\/strong\u003e— ensures secure shutdown of multi-phase equipment with straightforward conditioning for drive systems, pumps, conveyors, and HVAC com­ponents.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNEMA 3R enclosure\u003c\/strong\u003e— weather-resistant design protects electrical contacts and wiring from the elements, dust, and incidental moisture, making it suitable for outdoor installations and harsh environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible or Non-Fusible configurations\u003c\/strong\u003e— choose the protection approach that best fits your system’s safety and maintenance plan (fusible for overcurrent protection options or non-fusible for direct isolation).\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDirect replacement mindset\u003c\/strong\u003e— sized and configured to align with original equipment manuals, helping you maintain BOM integrity during replacements or spares stocking.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this safety switch matters for your equipment\u003c\/h3\u003e\n\u003cp\u003eWhen you need a dependable disconnect at the point of use, the DU321RB delivers predictable performance and clear, hard-wired isolation. It’s ideal for rapid service outages, safe maintenance windows, and ensuring that downstream machinery stays protected during maintenance or fault conditions. By keeping a spare that matches the original part number, you reduce procurement risk and simplify maintenance ceremonies.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number\u003c\/strong\u003e: DU321RB\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 \u003cli\u003e\n\u003cstrong\u003eEnclosure rating\u003c\/strong\u003e: NEMA 3R\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfigurations\u003c\/strong\u003e: Fusible or Non-Fusible\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal for\u003c\/h3\u003e\n\u003cp\u003eManufacturing lines, process equipment, pump stations, HVAC systems, and other machinery requiring a reliable disconnect with an easy-to-service, weather-resistant enclosure. It’s particularly well-suited for replacement projects where maintaining BOM alignment is important, or when stocking spares to minimize downtime.\u003c\/p\u003e \u003ch3\u003eHow AmpState supports you\u003c\/h3\u003e\n\u003cp\u003eAvailable from AmpState, the DU321RB is part of a trusted lineup designed for clarity, compatibility, and long-term availability. If you’re unsure about fit or need help confirming compatibility with your existing equipment, send us a message and we’ll help verify the match against your part numbers and installation requirements.\u003c\/p\u003e \u003cp\u003eReady to secure your equipment with a proven Square D safety switch? Add the DU321RB to your cart and maintain reliable, code-compliant isolation for your critical systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410892673186,"sku":"DU321RB","price":644.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-du321rb-30a-3p-240v-safety-switch-nema-3r-fusible-non-399.webp?v=1788986011","url":"https:\/\/www.ampstate.com\/products\/square-d-du321rb-30a-3p-240v-safety-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}