Introducing the HONEYWELL MICRO SWITCH™ SX Series Subminiature Basic Switch, designed for high reliability and precision in demanding applications. This premium snap-action switch offers exceptional performance with extended operational life and versatile mounting options.
Product Features
Small size and lightweight design suitable for space-constrained applications
Extended operating life up to 10 million cycles (for 11SX listings)
Low operating force with sensitive differential travel as low as 0.001 inches
Multiple actuator options including pin plunger, roller, and leaf types
Choice of electrical terminations: quick connect, solder, and PCB
High temperature construction options up to 400°F (204°C)
UL/CSA, cUL, ENEC, and CE approvals for global compliance
Available in phenolic or Valox housing with sealed case construction
Low operating force to 3 oz., sensitive differential travel as low as 0.001 in, power load switching capability to 7 A
Ampere Rating
1 A to 7 A
Circuitry
SPDT, SPNO
Operating Force
0.71 oz to 6 oz
Termination
Quick connect, solder, PCB
Voltage
125 Vac, 250 Vac, 28 Vdc
Agency Approvals
UL, CE, CSA, ENEC
Operating Temperature
-55°C to 125°C [-67°F to 267°F]
Contacts
Silver, gold
Housing
Phenolic or Valox
Expected Mechanical Life
Up to 10 million operations (11SX listings)
Size
10.2 mm H x 5.08 mm W x 12.7 mm L [0.4 in H x 0.20 in W x 0.5 in L]
Application Areas
Aerospace
Industrial equipment such as appliances, instrumentation, office equipment, and valves
Medical and dental equipment
Additional Details
This switch features elongated mounting holes for easier and more accurate installation, with options for high-temperature construction and MIL-PRF-8805 qualified listings. The MICRO SWITCH™ SX Series is ideal for high-cost failure applications requiring reliable and repeatable switching performance.
For more detailed specifications and options, please refer to the datasheet.
Note: Datasheet was not processed; please search the internet for the part number for more details.
Note: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.
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{"id":10008493654333,"title":"21SX81-H58","handle":"21sx81-h58","description":"\u003ch3\u003eHONEYWELL MR 21SX81-H58 SUBMINIATURE BASIC SWITCH\u003c\/h3\u003e\n\u003cp\u003eIntroducing the \u003cstrong\u003eHONEYWELL MICRO SWITCH™ SX Series\u003c\/strong\u003e Subminiature Basic Switch, designed for high reliability and precision in demanding applications. This premium snap-action switch offers exceptional performance with extended operational life and versatile mounting options.\u003c\/p\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmall size and lightweight design suitable for space-constrained applications\u003c\/li\u003e\n\u003cli\u003eExtended operating life up to 10 million cycles (for 11SX listings)\u003c\/li\u003e\n\u003cli\u003eLow operating force with sensitive differential travel as low as 0.001 inches\u003c\/li\u003e\n\u003cli\u003eMultiple actuator options including pin plunger, roller, and leaf types\u003c\/li\u003e\n\u003cli\u003eChoice of electrical terminations: quick connect, solder, and PCB\u003c\/li\u003e\n\u003cli\u003eHigh temperature construction options up to 400°F (204°C)\u003c\/li\u003e\n\u003cli\u003eUL\/CSA, cUL, ENEC, and CE approvals for global compliance\u003c\/li\u003e\n\u003cli\u003eAvailable in phenolic or Valox housing with sealed case construction\u003c\/li\u003e\n\u003cli\u003eRoHS compliant (status not specified)\u003c\/li\u003e\n\u003cli\u003ePart Number: 21SX81-H58\u003c\/li\u003e\n\u003cli\u003eManufacturer: HONEYWELL\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: MX (Mexico)\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA (Each)\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK\u003c\/li\u003e\n\u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sx81-h58.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eCharacteristic\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferentiator\u003c\/td\u003e\n\u003ctd\u003eLow operating force to 3 oz., sensitive differential travel as low as 0.001 in, power load switching capability to 7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmpere Rating\u003c\/td\u003e\n\u003ctd\u003e1 A to 7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuitry\u003c\/td\u003e\n\u003ctd\u003eSPDT, SPNO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Force\u003c\/td\u003e\n\u003ctd\u003e0.71 oz to 6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination\u003c\/td\u003e\n\u003ctd\u003eQuick connect, solder, PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e125 Vac, 250 Vac, 28 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approvals\u003c\/td\u003e\n\u003ctd\u003eUL, CE, CSA, ENEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C to 125°C [-67°F to 267°F]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContacts\u003c\/td\u003e\n\u003ctd\u003eSilver, gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003ePhenolic or Valox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpected Mechanical Life\u003c\/td\u003e\n\u003ctd\u003eUp to 10 million operations (11SX listings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e10.2 mm H x 5.08 mm W x 12.7 mm L [0.4 in H x 0.20 in W x 0.5 in L]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eApplication Areas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eIndustrial equipment such as appliances, instrumentation, office equipment, and valves\u003c\/li\u003e\n\u003cli\u003eMedical and dental equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cp\u003eThis switch features elongated mounting holes for easier and more accurate installation, with options for high-temperature construction and MIL-PRF-8805 qualified listings. The MICRO SWITCH™ SX Series is ideal for high-cost failure applications requiring reliable and repeatable switching performance.\u003c\/p\u003e\n\u003cp\u003eFor more detailed specifications and options, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sx81-h58.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Datasheet was not processed; please search the internet for the part number for more details.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.\u003c\/strong\u003e\u003c\/p\u003e","published_at":"2025-08-08T02:33:44+05:30","created_at":"2025-08-08T02:33:44+05:30","vendor":"Waldom Electonics","type":"Switches","tags":["HWLL","Limit","Snap","STD_IMG","Switch","WLDM"],"price":286745,"price_min":286745,"price_max":286745,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50561322746173,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"21SX81-H58","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"21SX81-H58","public_title":null,"options":["Default Title"],"price":286745,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"21SX81-H58","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_85797ed6-60a5-4db4-9ed5-57e2386595ea.jpg?v=1754600624"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_85797ed6-60a5-4db4-9ed5-57e2386595ea.jpg?v=1754600624","options":["Title"],"media":[{"alt":null,"id":45719229432125,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1024,"width":1024,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_85797ed6-60a5-4db4-9ed5-57e2386595ea.jpg?v=1754600624"},"aspect_ratio":1.0,"height":1024,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_85797ed6-60a5-4db4-9ed5-57e2386595ea.jpg?v=1754600624","width":1024}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eHONEYWELL MR 21SX81-H58 SUBMINIATURE BASIC SWITCH\u003c\/h3\u003e\n\u003cp\u003eIntroducing the \u003cstrong\u003eHONEYWELL MICRO SWITCH™ SX Series\u003c\/strong\u003e Subminiature Basic Switch, designed for high reliability and precision in demanding applications. This premium snap-action switch offers exceptional performance with extended operational life and versatile mounting options.\u003c\/p\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmall size and lightweight design suitable for space-constrained applications\u003c\/li\u003e\n\u003cli\u003eExtended operating life up to 10 million cycles (for 11SX listings)\u003c\/li\u003e\n\u003cli\u003eLow operating force with sensitive differential travel as low as 0.001 inches\u003c\/li\u003e\n\u003cli\u003eMultiple actuator options including pin plunger, roller, and leaf types\u003c\/li\u003e\n\u003cli\u003eChoice of electrical terminations: quick connect, solder, and PCB\u003c\/li\u003e\n\u003cli\u003eHigh temperature construction options up to 400°F (204°C)\u003c\/li\u003e\n\u003cli\u003eUL\/CSA, cUL, ENEC, and CE approvals for global compliance\u003c\/li\u003e\n\u003cli\u003eAvailable in phenolic or Valox housing with sealed case construction\u003c\/li\u003e\n\u003cli\u003eRoHS compliant (status not specified)\u003c\/li\u003e\n\u003cli\u003ePart Number: 21SX81-H58\u003c\/li\u003e\n\u003cli\u003eManufacturer: HONEYWELL\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: MX (Mexico)\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA (Each)\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK\u003c\/li\u003e\n\u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sx81-h58.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eCharacteristic\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferentiator\u003c\/td\u003e\n\u003ctd\u003eLow operating force to 3 oz., sensitive differential travel as low as 0.001 in, power load switching capability to 7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmpere Rating\u003c\/td\u003e\n\u003ctd\u003e1 A to 7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuitry\u003c\/td\u003e\n\u003ctd\u003eSPDT, SPNO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Force\u003c\/td\u003e\n\u003ctd\u003e0.71 oz to 6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination\u003c\/td\u003e\n\u003ctd\u003eQuick connect, solder, PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e125 Vac, 250 Vac, 28 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgency Approvals\u003c\/td\u003e\n\u003ctd\u003eUL, CE, CSA, ENEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C to 125°C [-67°F to 267°F]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContacts\u003c\/td\u003e\n\u003ctd\u003eSilver, gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing\u003c\/td\u003e\n\u003ctd\u003ePhenolic or Valox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpected Mechanical Life\u003c\/td\u003e\n\u003ctd\u003eUp to 10 million operations (11SX listings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e10.2 mm H x 5.08 mm W x 12.7 mm L [0.4 in H x 0.20 in W x 0.5 in L]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eApplication Areas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAerospace\u003c\/li\u003e\n\u003cli\u003eIndustrial equipment such as appliances, instrumentation, office equipment, and valves\u003c\/li\u003e\n\u003cli\u003eMedical and dental equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cp\u003eThis switch features elongated mounting holes for easier and more accurate installation, with options for high-temperature construction and MIL-PRF-8805 qualified listings. The MICRO SWITCH™ SX Series is ideal for high-cost failure applications requiring reliable and repeatable switching performance.\u003c\/p\u003e\n\u003cp\u003eFor more detailed specifications and options, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sx81-h58.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Datasheet was not processed; please search the internet for the part number for more details.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.\u003c\/strong\u003e\u003c\/p\u003e"}
I'm particularly impressed with how carefully the header pins are packed for the RP2350-PiZero, they arrived in perfect condition without any bent pins, which has been a persistent issue with other competitors. This attention to packaging detail really stands out.
I also received the latest A4 revision of the RP2350, which shows you maintain current inventory, that's really valuable for customers who want the most up to date components.
The delivery was quick and hassle free throughout. I'll definitely be recommending you to others!
App feedback: The discounts offered through the app are a nice bonus, but the component search function could be improved to match the ease of use on the website version. The rest of the app functions work well.
