{"product_id":"51ml1-e1-honeywell-heavy-duty-spdt-limit-switch-with-roller-lever-20a-600vac","title":"51ML1-E1 | Honeywell Heavy-Duty SPDT Limit Switch with Roller Lever, 20A 600VAC","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe Honeywell 51ML1-E1 is a single-pole double-throw (SPDT) heavy-duty limit switch with a nylon roller lever designed for reliable position sensing in industrial environments. Featuring a durable die-cast alloy housing and threaded conduit entry, it ensures safe operation even in hazardous locations. This switch provides high performance with precise travel characteristics and robust electrical ratings for demanding control applications.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 470.251px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eSensors \u0026amp; Switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e51ML1-E1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eLimit Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperator Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eHead\/Operator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eSide Rotary Roller Lever\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Force\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e3 lb (13.3 N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eHeavy-Duty Hazardous Location Limit Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eHead Action\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eSpring Return, Standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003ePoles\/Contacts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eSPDT (1 NO \/ 1 NC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eCurrent Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e20A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e600 VAC \/ 230 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eTravel Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eCW or CCW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003ePre-Travel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e12° Maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eDifferential Travel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e4° Maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eOver-Travel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e60° Minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eBody Construction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eDie-Cast Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eThreaded Entry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eConnection Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e1\/2 in. NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnvironmental Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eNEMA A600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eHazard Classification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003eClass I, Groups C \u0026amp; D; Class II, Groups E, F \u0026amp; G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 32.5536%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.1337%; height: 19.5938px;\"\u003e2.34 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003e51ML1-E1\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe 51ML1-E1 is part of Honeywell’s MICRO SWITCH™ ML Series of heavy-duty limit switches built for hazardous locations and industrial automation. It features a side rotary roller lever actuator with spring-return action, suitable for applications requiring accurate position feedback under mechanical or environmental stress. The die-cast alloy construction offers excellent durability, while the threaded entry design allows for secure conduit connection. With a SPDT contact configuration and 20A rating, this unit delivers dependable switching performance in both AC and DC circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSPDT Contact Configuration: Provides one normally open and one normally closed contact for flexible control logic.\u003c\/li\u003e\n\u003cli\u003eHeavy-Duty Construction: Die-cast alloy housing ensures long-term durability in demanding industrial environments.\u003c\/li\u003e\n\u003cli\u003eHazardous Location Rated: Certified for Class I, Groups C and D, and Class II, Groups E, F, and G hazardous areas.\u003c\/li\u003e\n\u003cli\u003eHigh Current Capacity: Handles up to 20 amps at 600 VAC, supporting a wide range of power and signal applications.\u003c\/li\u003e\n\u003cli\u003ePrecision Travel Control: Features 12° maximum pre-travel, 4° differential, and 60° over-travel for accurate operation.\u003c\/li\u003e\n\u003cli\u003eRugged Roller Lever Operator: Nylon roller lever allows smooth and consistent actuation with minimal wear.\u003c\/li\u003e\n\u003cli\u003eThreaded Electrical Entry: 1\/2\" NPT conduit entry ensures secure wiring connections and easy installation.\u003c\/li\u003e\n\u003cli\u003eWide Operating Range: Suitable for clockwise or counterclockwise travel direction with spring-return mechanism.\u003c\/li\u003e\n\u003cli\u003eReliable Electrical Performance: NEMA A600 rated for industrial use, offering dependable contact integrity under load.\u003c\/li\u003e\n\u003cli\u003eIndustrial-Grade Design: Built for machinery, conveyor systems, and control panels requiring dependable limit sensing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 51ML1-E1 delivers the reliability and precision required for industrial automation and hazardous environment position control.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105090806016,"sku":"51ML1-E1","price":3585.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/51ML1-E1.jpg?v=1785539963","url":"https:\/\/alotechparts.com\/products\/51ml1-e1-honeywell-heavy-duty-spdt-limit-switch-with-roller-lever-20a-600vac","provider":"Alo Tech Solutions","version":"1.0","type":"link"}