59040 Series - Cylindrical Reed Sensor with Retaining Ribs

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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 59040 Press-Fit Reed Sensor is a small, cylindrical reed sensor 31.0 mm (1.22”) long that presses into a 9.5 mm (.375”) diameter hole with a choice of normally open, normally closed or change-over contacts. It is capable of switching up to 200 Vdc at 10 W Contact rating. Extensive range of sensitivity with specified cable length is available. The housing color is white. It has three crush ribs along the length of the capsule that allow a firm and fixed press-fit. It is well suited for use in a wide range of industrial, appliances, or IoT proximity sensing applications. It functions best with the 57040 actuator.

Features & Benefits:

  • Non-contact switching solution for wet & harsh environments
  • No leakage current in ‘open’ state−ideal for battery-powered IoT applications 
  • Helps implement efficient proximity/access and energy management systems
  • Compact size and easy installation and effective concealment in many applications
  • Hermetically sealed, IP67 rated; UL and REACH compliant 
  • Can operate through non-ferrous materials (for example, wood, plastic, or aluminum)
  • Available in select sensitivities (operating distances)
  • Standard cable configurations; customization options available 
  • UL Recognized per UL 508 and CSA C22.2 No. 14.
Applications:
  • Security and access control
  • Factory automation
  • Process Equipment
  • Major appliances
  • 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)Switching Voltage (V AC)Switching Current (A AC)Breakdown Voltage (V DC)Max Contact Resistance (Ω)Magnetic Sensitivity (AT)Nominal Activate Distance (mm)Switch TypeMax Operate Time (ms)Max Release Time (ms)Operating TemperatureStockSamplesCompare
59040-1-S102000.51400.352500.212 to 1825A:SPST-NO11-40° to 105°CCheckOrder
59040-1-T102000.51400.352500.217 to 2321.2A:SPST-NO11-40° to 105°CCheckOrder
59040-1-U102000.51400.352500.222 to 2817.9A:SPST-NO11-40° to 105°CCheckOrder
59040-3-S51750.251200.182000.215 to 2021C:SPDT-CO33-40° to 105°CCheckOrder
59040-3-T51750.251200.182000.220 to 2518.4C:SPDT-CO33-40° to 105°CCheckOrder
59040-3-U51750.251200.182000.225 to 3017C:SPDT-CO33-40° to 105°CCheckOrder
59040-4-S51750.251200.182000.215 to 2021B:SPST-NC33-40° to 105°CCheckOrder
59040-4-T51750.251200.182000.220 to 2518.4B:SPST-NC33-40° to 105°CCheckOrder
59040-4-U51750.251200.182000.225 to 3017B:SPST-NC33-40° to 105°CCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
59040-1-U-02-A 59040-1-U-02-A SENS RoHS No 03/11/2018 PbFree No 03/11/2018 Yes
03/11/2018
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