{"product_id":"800h-jr2a-allen-bradley-maintained-knob-switch-1no-1nc","title":"800H-JR2A Allen-Bradley Maintained Knob Switch 1NO 1NC","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e800H-JR2A\u003c\/strong\u003e is a commercial-grade, heavy-duty 3-position industrial selector switch from the premium 800H product family manufactured by Allen-Bradley (Rockwell Automation). Purpose-built to provide dependable manual control segmentation within severe and highly corrosive process environments, this non-illuminated control unit features a distinct black plastic knob operator. Utilizing a secure maintained\/latched action across all three indexed states, the compact \u003cstrong style=\"color: #0056b3;\"\u003e0.132 kg (0.29 lbs)\u003c\/strong\u003e component comes pre-configured with a reliable 1NO (Normally Open) \/ 1NC (Normally Closed) contact block arrangement to orchestrate instantaneous logical switching sequences.\u003c\/p\u003e\n\n\u003ch2\u003eCore Technical Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Structural Build:\u003c\/strong\u003e Molded from a specialized glass-filled nylon (PA6\/PA66) bezel compound that delivers exceptional chemical shielding and structural rigidity, making it ideal for harsh marine, water treatment, and chemical processing setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintained 3-Position Multi-Loop Indexing:\u003c\/strong\u003e Features an explicit 0° to 60° operational displacement path that firmly latches into the Left, Center, or Right positions, preventing accidental state changes caused by machinery vibrations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Mechanical Longevity:\u003c\/strong\u003e Engineered to withstand rigorous physical deployment cycles, with a verified service rating of up to 200,000 continuous mechanical switching operations before requiring component service.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtreme Environmental Hardening:\u003c\/strong\u003e Formulated to operate reliably under punishing physical stress profiles, surviving sudden high-impact shocks up to 100g (11 ms duration) and handling intense vibration frequencies up to 2000 Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 15px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eSpecification Details\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eModel Catalog Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e800H-JR2A\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eProduct Line Family\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eAllen-Bradley 800H Heavy Duty Series\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eOperator Configuration\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e3-Position, Maintained \/ Latched Action Block\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eContact Block Profile\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e1NO (Normally Open) and 1NC (Normally Closed) Array\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003ePhysical Net Mass\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e0.132 kg (approx. 0.29 lbs) lightweight block\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eBezel Material Composition\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eGlass-Filled Nylon \/ PA6 \/ PA66 Industrial Polymer\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eOperational Travel Angle\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e0° to 60° indexing sweep trajectory\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eThermal Operating Window\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e–40°C to 55°C (–40°F to 131°F) continuous ambient\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eRelative Humidity Range\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e50% to 95% RH non-condensing moisture scale\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eMechanical Shock Limits\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e100g peak acceleration over an 11 ms duration window\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eIndustrial Solutions\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical Processing Stations:\u003c\/strong\u003e Resists breakdown from chemical splashes and caustic cleaning agents thanks to its glass-filled nylon construction, keeping local manual control nodes fully operational.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Treatment Control Cabinets:\u003c\/strong\u003e Provides steady state selection for motorized valves and intake pumps in highly humid control environments (up to 95% RH) without moisture-induced tracking path failures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePetrochemical Processing:\u003c\/strong\u003e Delivers exceptional physical endurance in heavy oil refining facilities, withstanding outdoor sub-zero shifts down to –40°C and sudden high-vibration engine shocks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomated Production Tooling:\u003c\/strong\u003e Acts as a distinct visual and physical selector for Hand\/Off\/Auto (HOA) operation sequences, allowing maintenance teams to isolate control inputs during tooling changes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWiring \u0026amp; Installation\u003c\/h2\u003e\n\u003ch3\u003eCircuit Isolation Protocols\u003c\/h3\u003e\n\u003cp\u003eIsolate all primary and secondary high-voltage control circuit buses before beginning structural panel installation. Mount the 800H operator assembly firmly into a standard 30.5 mm environmental cutout. Ensure the internal sealing gaskets are seated flat against the panel faceplate to maintain a tight seal.\u003c\/p\u003e\n\n\u003ch3\u003eContact Block Wiring Parameters\u003c\/h3\u003e\n\u003cp\u003eTerminate the incoming control logic wires securely to the designated contact block terminal screws. Wire the 1NO contact pair to your active run-command circuits and the 1NC contact set to your interlocking or status monitoring indicators. Do not exceed the maximum rated installation tightening torque, as this can crack the plastic module shell.\u003c\/p\u003e\n\n\u003ch3\u003eEnvironmental Clearance and Gasketing\u003c\/h3\u003e\n\u003cp\u003eVerify that the rear terminal housing has sufficient free clearance from adjacent components inside the wiring duct or junction box. When deploying this switch in wet or washdown locations, use the provided corrosion-resistant sealing ring to block water ingress along the back of the panel plate.\u003c\/p\u003e\n\n\u003ch3\u003eVibration Hardening Verification\u003c\/h3\u003e\n\u003cp\u003eIn high-vibration applications like drilling rigs or heavy crushing plants, check that the rear contact block latch mechanism is fully locked onto the operator throat. Periodically check terminal screw tightness to prevent signal dropping caused by ongoing mechanical vibrations up to 10 m\/s².\u003c\/p\u003e\n\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty NEMA 4X Compatibility:\u003c\/strong\u003e Designed to meet demanding Type 4\/4X\/13 enclosure specifications when correctly mounted, blocking water jets, dust particles, and corrosive elements from reaching the contacts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTactile Black Knob Operator:\u003c\/strong\u003e Features a high-contrast black knob that gives field technicians clear visual feedback on the switch's position, even from a distance or in low light.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModular Contact Block Stacking:\u003c\/strong\u003e The flexible 800H operator design allows for easy removal or expansion of contact blocks, making it simple to adapt to custom field modifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What is the benefit of a \"maintained\" selector switch versus a \"spring return\" configuration?\u003c\/strong\u003e\u003cbr\u003e\nA1: A maintained switch stays in the position selected by the operator until turn manually to a different state. Spring return versions automatically snap back to a default center position when released, making maintained models ideal for setting long-term operation modes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: Why does the 0.132 kg weight profile matter when configuring dense industrial control panels?\u003c\/strong\u003e\u003cbr\u003e\nA2: The light 0.132 kg weight ensures that deploying dozens of these devices across a single hanging enclosure door won't cause structural sagging, hinge distortion, or alignment issues over time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: Can this selector switch be deployed safely in extreme cold-storage facilities?\u003c\/strong\u003e\u003cbr\u003e\nA3: Yes. The 800H-JR2A is fully rated to operate reliably down to –40°C (–40°F), allowing it to handle freezing conditions in commercial ice production, cold storage warehouses, and outdoor arctic environments.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51047915454596,"sku":"800H-JR2A","price":155.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/800H-JR2A-1.jpg?v=1780323071","url":"https:\/\/www.etowonauto.com\/products\/800h-jr2a-allen-bradley-maintained-knob-switch-1no-1nc","provider":"Etowon Auto","version":"1.0","type":"link"}