{"product_id":"jn-423-100a-3-pole-3-phase-fusible-safety-switch","title":"JN-423 - 100A, 3-Pole, 3-Phase, Fusible, Safety Switch","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eJN-423\u003c\/strong\u003e is a compact, rugged \u003cem\u003e100A\u003c\/em\u003e safety switch engineered for reliable on\/off isolation and precise overcurrent protection in demanding industrial and commercial environments. With \u003cstrong\u003e3-Pole\u003c\/strong\u003e and \u003cstrong\u003e3-Phase\u003c\/strong\u003e configuration, this fusible safety switch delivers clean, coordinated disconnects for multi-line electrical systems, helping keep motors and critical loads safe during startup, operation, and maintenance.\u003c\/p\u003e \u003ch3\u003eWhy the JN-423 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole, 3-Phase design\u003c\/strong\u003e ensures complete isolation of all live conductors, preventing partial power withdrawal and reducing the risk of arc flash during servicing.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible protection\u003c\/strong\u003e provides fast, selective overcurrent clearance, protecting both equipment and wiring from overloads while allowing quick fuse replacement to minimize downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e100A rating\u003c\/strong\u003e is well-suited for mid-sized motor loads, equipment control circuits, and branch protection without sacrificing space in control panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact, maintainable construction\u003c\/strong\u003e supports easy installation in tight panel enclosures and straightforward fuse cartridge access for regular maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e—ideal for motor disconnects, panelboards, and branch circuit protection where a dependable, easy-to-service fusible switch is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems this switch solves\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePrevents equipment damage from overloads by interrupting all three phases quickly and reliably.\u003c\/li\u003e \u003cli\u003eDelivers safe, clear isolation for maintenance or repairs, reducing exposure to live circuits.\u003c\/li\u003e \u003cli\u003eStreamlines panel design with a dedicated, compact fusible disconnect that fits into common control layouts.\u003c\/li\u003e \u003cli\u003eEnables targeted protection for motors and feeders, helping to minimize nuisance tripping and downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eThe JN-423 sits in line with your motor or branch circuit. When protection is needed, the fusible element opens to interrupt current across all three phases, providing complete isolation and rapid fault clearing. The 3-pole arrangement guarantees that every conductor is disconnected, so maintenance staff can service equipment safely without guesswork about which lines remain energized.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor disconnects in manufacturing lines, conveyors, and pumps requiring reliable fault isolation.\u003c\/li\u003e \u003cli\u003ePanelboard protection where a dedicated fusible switch simplifies wiring, labeling, and maintenance routines.\u003c\/li\u003e \u003cli\u003eBranch circuit protection in industrial or commercial equipment rooms with space-conscious panel layouts.\u003c\/li\u003e \u003cli\u003eHVAC equipment and large electrical assemblies needing a compact, serviceable safety switch.\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 JN-423\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 100A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-Phase\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFused:\u003c\/strong\u003e Fusible\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits from the JN-423\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical engineers and panel builders designing reliable, serviceable motor control systems.\u003c\/li\u003e \u003cli\u003eMaintenance teams seeking straightforward fuse replacement and clear, decisive isolation during servicing.\u003c\/li\u003e \u003cli\u003eFacility managers and OEMs looking for a durable, space-conscious safety switch that scales with mid-sized motor loads.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for maximum value\u003c\/h3\u003e\n\u003cp\u003ePair the JN-423 with correctly rated fuse links based on motor nameplate data and start-up current. During installation, verify that all three lines are fully de-energized before any servicing. Keep a small stock of compatible fuse links accessible to minimize downtime when replacements are needed. For panel designers, plan for a compact footprint that accommodates the 3-pole, 3-phase layout and allows straightforward wiring and labeling.\u003c\/p\u003e \u003cp\u003eEngineered for dependable performance where reliable isolation and targeted overcurrent protection are non-negotiable, the JN-423 delivers a solid, maintenance-friendly solution for mid-size electrical systems. Get the protection you need with a switch that keeps your motors and circuits safe, organized, and easy to service.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default","offer_id":46390386622626,"sku":"JN-423","price":1493.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/jn-423-100a-3-pole-phase-fusible-safety-switch-145.webp?v=1788872464","url":"https:\/\/www.ampstate.com\/products\/jn-423-100a-3-pole-3-phase-fusible-safety-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}