Discover the high-performance capabilities of the HONEYWELL MICRO SWITCH™ 21SM289-T, a premium subminiature basic switch designed for precision applications across aerospace and industrial sectors. Engineered with industry-leading durability and reliability, this switch ensures consistent operation in demanding environments.
Product Features
Long Life Cycle: Mechanical lifespan of up to 10,000,000 operations, reducing replacement frequency and total system costs.
Exceptional Temperature Range: Operates reliably from -54 °C to 204 °C (-65 °F to 400 °F), suitable for harsh conditions.
Compact & Robust Design: Constructed from military-grade components, lightweight, and MIL-PRF-8805 qualified.
Electrical Capacity: Handles power loads up to 11 A (Vac) or 1/4 HP (Vac).
Versatile Actuation & Termination: Available with pin plunger, straight lever, roller lever, simulated roller lever, or paddle lever; termination options include quick connect, solder, and PCB.
Global Approvals: UL, CSA, ENEC, CE, MIL-PRF-8805, FAA-PMA approved for worldwide use.
Low Operating Force & Precise Travel: Operating forces as low as 0.06 N (6 g) and differential travel as low as 0.025 mm (0.001 in).
Technical Specifications
Characteristic
Parameter
Differentiator
Low operating force to 2 oz., power switching up to 11 A, motor load handling capacity to 1/4 HP
Ampere Rating
0.1 A to 11 A
Circuitry
SPDT
Operating Force
0.04 oz to 2 oz
Voltage
115 Vac, 125 Vac, 250 Vac, 30 Vdc
Contacts
Silver, gold plated, bifurcated gold
Housing
Phenolic
Mechanical Life
Up to 10 million operations
Size
12.7 mm H x 6.35 mm W x 20.3 mm L (0.5 in H x 0.25 in W x 0.8 in L)
Operating Temperature
-54 °C to 121 °C [-65 °F to 250 °F]; select listings up to 204 °C [400 °F]
Applications
Aerospace: Monitoring door positions, landing gear status, cockpit controls, and military switch assemblies.
Industrial: Pressure and temperature switches, fuel level detection in power generation.
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{"id":10028312592701,"title":"21SM289-T","handle":"21sm289-t","description":"\u003ch3\u003eHONEYWELL MICRO SWITCH™ PREMIUM SUBMINIATURE BASIC SWITCH (Part Number: 21SM289-T)\u003c\/h3\u003e\n\n\u003cp\u003eDiscover the high-performance capabilities of the \u003cstrong\u003eHONEYWELL MICRO SWITCH™ 21SM289-T\u003c\/strong\u003e, a premium subminiature basic switch designed for precision applications across aerospace and industrial sectors. Engineered with industry-leading durability and reliability, this switch ensures consistent operation in demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eLong Life Cycle:\u003c\/strong\u003e Mechanical lifespan of up to \u003cstrong\u003e10,000,000 operations\u003c\/strong\u003e, reducing replacement frequency and total system costs.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eExceptional Temperature Range:\u003c\/strong\u003e Operates reliably from \u003cstrong\u003e-54 °C to 204 °C\u003c\/strong\u003e (-65 °F to 400 °F), suitable for harsh conditions.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Robust Design:\u003c\/strong\u003e Constructed from military-grade components, lightweight, and MIL-PRF-8805 qualified.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eElectrical Capacity:\u003c\/strong\u003e Handles power loads up to \u003cstrong\u003e11 A (Vac)\u003c\/strong\u003e or \u003cstrong\u003e1\/4 HP (Vac)\u003c\/strong\u003e.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eVersatile Actuation \u0026amp; Termination:\u003c\/strong\u003e Available with pin plunger, straight lever, roller lever, simulated roller lever, or paddle lever; termination options include quick connect, solder, and PCB.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGlobal Approvals:\u003c\/strong\u003e UL, CSA, ENEC, CE, MIL-PRF-8805, FAA-PMA approved for worldwide use.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLow Operating Force \u0026amp; Precise Travel:\u003c\/strong\u003e Operating forces as low as \u003cstrong\u003e0.06 N (6 g)\u003c\/strong\u003e and differential travel as low as \u003cstrong\u003e0.025 mm (0.001 in)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eCharacteristic\u003c\/th\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eDifferentiator\u003c\/td\u003e\n \u003ctd\u003eLow operating force to 2 oz., power switching up to 11 A, motor load handling capacity to 1\/4 HP\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eAmpere Rating\u003c\/td\u003e\n \u003ctd\u003e0.1 A to 11 A\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eCircuitry\u003c\/td\u003e\n \u003ctd\u003eSPDT\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Force\u003c\/td\u003e\n \u003ctd\u003e0.04 oz to 2 oz\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eVoltage\u003c\/td\u003e\n \u003ctd\u003e115 Vac, 125 Vac, 250 Vac, 30 Vdc\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eContacts\u003c\/td\u003e\n \u003ctd\u003eSilver, gold plated, bifurcated gold\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eHousing\u003c\/td\u003e\n \u003ctd\u003ePhenolic\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMechanical Life\u003c\/td\u003e\n \u003ctd\u003eUp to 10 million operations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSize\u003c\/td\u003e\n \u003ctd\u003e12.7 mm H x 6.35 mm W x 20.3 mm L (0.5 in H x 0.25 in W x 0.8 in L)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n \u003ctd\u003e-54 °C to 121 °C [-65 °F to 250 °F]; select listings up to 204 °C [400 °F]\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eAerospace:\u003c\/strong\u003e Monitoring door positions, landing gear status, cockpit controls, and military switch assemblies.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eIndustrial:\u003c\/strong\u003e Pressure and temperature switches, fuel level detection in power generation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: 21SM289-T\u003c\/li\u003e\n \u003cli\u003eManufacturer: HONEYWELL\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: MX\u003c\/li\u003e\n \u003cli\u003eUOM: EA\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: Not specified\u003c\/li\u003e\n \u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sm289-t.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Datasheet was not processed, please search the internet for the part number \u003cem\u003e21SM289-T\u003c\/em\u003e for more details.\u003c\/p\u003e\u003cbr\u003e","published_at":"2025-08-16T09:24:41+05:30","created_at":"2025-08-16T09:24:41+05:30","vendor":"Waldom Electonics","type":"Switches","tags":["HWLL","IMPORT_CSV","IMPORT_PT2","Snap","Switch","WLDM"],"price":284805,"price_min":284805,"price_max":284805,"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":50627141566781,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"21SM289-T","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"21SM289-T","public_title":null,"options":["Default Title"],"price":284805,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"21SM289-T","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/21SM289-T_11915770_3c2ed64f.jpg?v=1755316484"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/21SM289-T_11915770_3c2ed64f.jpg?v=1755316484","options":["Title"],"media":[{"alt":null,"id":45866442686781,"position":1,"preview_image":{"aspect_ratio":1.175,"height":200,"width":235,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/21SM289-T_11915770_3c2ed64f.jpg?v=1755316484"},"aspect_ratio":1.175,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/21SM289-T_11915770_3c2ed64f.jpg?v=1755316484","width":235}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eHONEYWELL MICRO SWITCH™ PREMIUM SUBMINIATURE BASIC SWITCH (Part Number: 21SM289-T)\u003c\/h3\u003e\n\n\u003cp\u003eDiscover the high-performance capabilities of the \u003cstrong\u003eHONEYWELL MICRO SWITCH™ 21SM289-T\u003c\/strong\u003e, a premium subminiature basic switch designed for precision applications across aerospace and industrial sectors. Engineered with industry-leading durability and reliability, this switch ensures consistent operation in demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eLong Life Cycle:\u003c\/strong\u003e Mechanical lifespan of up to \u003cstrong\u003e10,000,000 operations\u003c\/strong\u003e, reducing replacement frequency and total system costs.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eExceptional Temperature Range:\u003c\/strong\u003e Operates reliably from \u003cstrong\u003e-54 °C to 204 °C\u003c\/strong\u003e (-65 °F to 400 °F), suitable for harsh conditions.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Robust Design:\u003c\/strong\u003e Constructed from military-grade components, lightweight, and MIL-PRF-8805 qualified.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eElectrical Capacity:\u003c\/strong\u003e Handles power loads up to \u003cstrong\u003e11 A (Vac)\u003c\/strong\u003e or \u003cstrong\u003e1\/4 HP (Vac)\u003c\/strong\u003e.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eVersatile Actuation \u0026amp; Termination:\u003c\/strong\u003e Available with pin plunger, straight lever, roller lever, simulated roller lever, or paddle lever; termination options include quick connect, solder, and PCB.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGlobal Approvals:\u003c\/strong\u003e UL, CSA, ENEC, CE, MIL-PRF-8805, FAA-PMA approved for worldwide use.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLow Operating Force \u0026amp; Precise Travel:\u003c\/strong\u003e Operating forces as low as \u003cstrong\u003e0.06 N (6 g)\u003c\/strong\u003e and differential travel as low as \u003cstrong\u003e0.025 mm (0.001 in)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eCharacteristic\u003c\/th\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eDifferentiator\u003c\/td\u003e\n \u003ctd\u003eLow operating force to 2 oz., power switching up to 11 A, motor load handling capacity to 1\/4 HP\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eAmpere Rating\u003c\/td\u003e\n \u003ctd\u003e0.1 A to 11 A\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eCircuitry\u003c\/td\u003e\n \u003ctd\u003eSPDT\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Force\u003c\/td\u003e\n \u003ctd\u003e0.04 oz to 2 oz\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eVoltage\u003c\/td\u003e\n \u003ctd\u003e115 Vac, 125 Vac, 250 Vac, 30 Vdc\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eContacts\u003c\/td\u003e\n \u003ctd\u003eSilver, gold plated, bifurcated gold\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eHousing\u003c\/td\u003e\n \u003ctd\u003ePhenolic\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMechanical Life\u003c\/td\u003e\n \u003ctd\u003eUp to 10 million operations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSize\u003c\/td\u003e\n \u003ctd\u003e12.7 mm H x 6.35 mm W x 20.3 mm L (0.5 in H x 0.25 in W x 0.8 in L)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n \u003ctd\u003e-54 °C to 121 °C [-65 °F to 250 °F]; select listings up to 204 °C [400 °F]\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eAerospace:\u003c\/strong\u003e Monitoring door positions, landing gear status, cockpit controls, and military switch assemblies.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eIndustrial:\u003c\/strong\u003e Pressure and temperature switches, fuel level detection in power generation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: 21SM289-T\u003c\/li\u003e\n \u003cli\u003eManufacturer: HONEYWELL\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: MX\u003c\/li\u003e\n \u003cli\u003eUOM: EA\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: Not specified\u003c\/li\u003e\n \u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-mr\/mr-21sm289-t.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Datasheet was not processed, please search the internet for the part number \u003cem\u003e21SM289-T\u003c\/em\u003e for more details.\u003c\/p\u003e\u003cbr\u003e"}
