59177 Series - Ultra-miniature Overmolded Reed Switch

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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The 59177 is an ultra-miniature overmolded reed switch 9.0mm x 2.5mm x 2.4mm (0.354”x 0.098‘’x 0.094‘’) body with smallest type footprint. It is capable of switching 170Vdc or 0.25A at up to 10W. Available in select sensitivity ranges.

*Inward formed J-Shaped
*The part can function with any of the Littelfuse provided magnets or actuators


  • Ultra-miniature size
  • Available in select sensitivities (operating distances)
  • Thermoset overmold material for added robustness
  • Solder reflow compliant to IPC-A-610 standard
  • Suitable for pick and place
  • No standby power requirement
  • Operates through non-ferrous materials such as wood, plastic or aluminum
  • Hermetically sealed, magnetically operated contacts
  • Tape and reel packaging


  • Security and access control
  • Metering
  • Battery powered consumer electronics & wearables
  • Factory automation
  • Process equipment
  • Small appliances
  • Proximity and limit sensing

Access specifications, certifications, check availability and order parts below

Catalog #Switching Power (W)Switching Voltage (V DC)Switching Current (A DC)Breakdown Voltage (V DC)Max Contact Resistance (Ω)Magnetic Sensitivity (AT)Body Length (mm)Overall Length (mm)Switch TypeOperating TemperaturePartner ECAD ModelsStockSamples
59177101700.251750.226 to 1089A:SPST-NO-40° to 125°C59177CheckOrder
Catalog # Certificates
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