{"product_id":"square-d-h312nds-disconnect-switch","title":"Square D H312NDS - 30A, 600V, 3-Pole, Fused Safety Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D H312NDS 30A, 600V, 3-Pole Fused Safety Switch is engineered for industrial and commercial environments that demand safe, reliable electrical isolation. With its fused design and three-pole configuration, it delivers dependable disconnection under load and supports proper lockout\/tagout procedures to protect maintenance personnel and equipment.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 30 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole (three-phase design)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Fused Safety Switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e H312NDS\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy it matters\u003c\/strong\u003e — this device combines protective fusing with a robust disconnect mechanism, meaning fault currents are limited at the source and downstream equipment is shielded from transients. The built-in fusion path enhances safety during de-energization, which is crucial for servicing motors, conveyors, and other three-phase machinery.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSafe maintenance workflows:\u003c\/strong\u003e Designed to accommodate lockout\/tagout procedures, ensuring circuits remain de-energized during service or inspection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable under-load disconnection:\u003c\/strong\u003e Engineered to disconnect safely even when connected to energized systems, reducing the risk of arc flash or equipment damage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable, industrial-grade build:\u003c\/strong\u003e Built to withstand the rigors of daily use in busy facilities, delivering long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e — perfect for controlling and protecting three-phase motors and process lines in manufacturing, packaging, and material handling; serve as service disconnects for industrial machinery; and function as safe shutdown points in warehouses, energy facilities, and data centers.\u003c\/p\u003e \u003cp\u003eFor facilities prioritizing safety, reliability, and clear electrical isolation, the Square D H312NDS 3-Pole Fused Safety Switch offers a concrete, purpose-built solution. Pair it with your control panels and maintenance procedures to ensure predictable, safe shutdowns and streamlined lockout\/tagout compliance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default Title","offer_id":46383786000546,"sku":"H312NDS","price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-h312nds-30a-600v-3-pole-fused-safety-switch-909.webp?v=1788834136","url":"https:\/\/www.ampstate.com\/products\/square-d-h312nds-disconnect-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}