{"product_id":"square-d-31055-366-50-200a-600v-3-pole-fusible-disconnect-switch","title":"Square D 31055-366-50 - 200A, 600V, 3-Pole, Fusible, Disconnect Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D 31055-366-50 is a rugged 200A, 600V, 3-Pole fusible disconnect switch engineered to deliver dependable on\/off isolation with integrated overcurrent protection in demanding industrial and commercial environments.\u003c\/p\u003e \u003cp\u003eSpecifically designed for motor disconnects, panelboards, and branch circuits, this compact switch combines a sturdy enclosure with a clearly accessible disconnect lever and field-replaceable fuses. It offers straightforward maintenance and minimizes downtime, keeping critical equipment running when it matters most.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 31055-366-50\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 200A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFusible:\u003c\/strong\u003e Fusible\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this fusible disconnect stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eReliable power isolation\u003c\/strong\u003e with a dedicated on\/off mechanism that clearly breaks the circuit when service is needed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated overcurrent protection\u003c\/strong\u003e via replaceable fuses, reducing the need for separate protective devices in many panel and motor applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact, maintainable design\u003c\/strong\u003e suited for tight spaces in industrial and commercial installations, while still delivering robust protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced three-pole configuration\u003c\/strong\u003e ensures coordinated disconnects across all phases, helping prevent partial energization and improving fault handling.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor control circuits where rapid, dependable shutdown is essential for safety and mechanical protection.\u003c\/li\u003e \u003cli\u003ePanelboard feeder sections requiring localized disconnect and overcurrent protection in a single, manageable unit.\u003c\/li\u003e \u003cli\u003eBranch circuits in environments with demanding duty cycles, where a compact fusible switch minimizes space without compromising reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical benefits and how it helps you\u003c\/h3\u003e\n\u003cp\u003eWith the 31055-366-50, you gain a clear, actionable isolation point for maintenance and fault isolation, improved protection for downstream equipment, and a straightforward path to fuse replacement when protection devices trip. Its rugged construction is well-suited to industrial floors, maintenance bays, and commercial facilities that demand durable electrical protection without sacrificing ease of service.\u003c\/p\u003e \u003ch3\u003eTips for installation and upkeep\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure the installed fuses match the motor or circuit’s start-up and running current requirements to maintain proper protection without nuisance trips.\u003c\/li\u003e \u003cli\u003eCoordinate with upstream protective devices to optimize short-circuit protection and select appropriate fuse types and ratings.\u003c\/li\u003e \u003cli\u003eDuring maintenance, inspect the enclosure for corrosion or contamination and verify that the disconnect lever moves freely and fully.\u003c\/li\u003e \u003cli\u003eFollow all applicable electrical codes and the manufacturer’s recommendations for mounting, wiring, and fuse replacement procedures.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Square D 31055-366-50 when you need a dependable, space-efficient fusible disconnect that delivers solid isolation and integrated protection for demanding motor and distribution applications at up to 200A and 600V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp-State","offers":[{"title":"Default","offer_id":46390251978914,"sku":"31055-366-50","price":1057.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/fusible_disconnect_generic_cf396168-e885-41ce-b6fb-d9bf70741699.png?v=1765367475","url":"https:\/\/www.ampstate.com\/products\/square-d-31055-366-50-200a-600v-3-pole-fusible-disconnect-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}