{"product_id":"square-d-h321nrb-30a-3-pole-heavy-duty-fusible-safety-switch","title":"Square D H321NRB - 30A, 3-Pole, Heavy-Duty, Fusible, Safety Switch","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D H321NRB\u003c\/strong\u003e is a 30A, 3-Pole, heavy-duty fusible safety switch engineered for reliable on\/off isolation and overcurrent protection in demanding industrial and commercial environments.\u003c\/p\u003e \u003cp\u003eThis compact, maintainable fusible switch delivers confident power control where space is at a premium, making it an ideal choice for motor disconnects, panelboards, and branch circuit protection. By combining switching and fuse protection in a single rugged enclosure, it helps crews quickly isolate circuits for safe maintenance while providing dependable fault interruption when protection is needed.\u003c\/p\u003e \u003ch3\u003eKey benefits\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design for 3-phase loads:\u003c\/strong\u003e Balanced switching ensures smooth operation of motors and equipment across all three phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible protection:\u003c\/strong\u003e Replaceable fuse elements provide fast, targeted interruption to safeguard wiring and connected machinery.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeavy-duty construction:\u003c\/strong\u003e Built to withstand demanding industrial and commercial environments, delivering long service life in harsh operating conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact footprint:\u003c\/strong\u003e Designed for panelboards and motor control centers where space efficiency matters without sacrificing protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintainnable by design:\u003c\/strong\u003e Optimized for straightforward maintenance and fuse replacements to minimize downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal applications and use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor disconnects in manufacturing lines, pumps, conveyors, and HVAC equipment where reliable isolation is essential.\u003c\/li\u003e \u003cli\u003ePanelboard protection where integrated switching and fuse protection reduce the need for separate components.\u003c\/li\u003e \u003cli\u003eBranch circuit protection in spaces with limited enclosure footprint, delivering compliant isolation for servicing and emergency stops.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e H321NRB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 30A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDuty:\u003c\/strong\u003e Heavy\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default","offer_id":46390422306978,"sku":"H321NRB","price":1144.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/fusible_disconnect_generic_d9e954db-0df3-4031-98d5-615ac95dc8c2.png?v=1765370701","url":"https:\/\/www.ampstate.com\/products\/square-d-h321nrb-30a-3-pole-heavy-duty-fusible-safety-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}