59040 Series - Cylindrical Reed Sensor with Retaining Ribs

Series: 59040
Questions? Contact Littelfuse Support
Littelfuse Reed Sensors 59040 Image
Roll Over to Zoom
Disclaimer Notice

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
     

Save
Save

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
Catalog # Certificates
Sorting icon
59040-1-S cRUiconURicon
59040-1-T cRUiconURicon
59040-1-U cRUiconURicon
59040-3-S cRUiconURicon
59040-3-T cRUiconURicon
59040-3-U cRUiconURicon
59040-4-S cRUiconURicon
59040-4-T cRUiconURicon
59040-4-U cRUiconURicon

pdficon Position and Level Sensing in Washing Machines

A most integral appliance in any home is a washing machine. Washing machines have helped made the chore of cleaning clothes quite effortless.
pdficon Littelfuse Reed Sensors 59040 datasheet

pdficon Reed Switch and Reed Sensor Activation Application Note

Although a reed switch can be activated by placing it inside an electrical coil many reed switches and reed sensors are used for proximity sensing and are activated by a magnet.
pdficon Inductive Load Arc Suppression Application Note

When a reed switch or reed sensor is used to control an inductive device (relay coil solenoid transformer small motor etc.)
pdficon Vibration Testing and Precautions Application Note

Littelfuse tests sinusoidal vibration according to Mil. Std. 202G Method 204D Test Condition G (10 ? 2000 Hz frequency sweep at 30 G or 0.06 inch double amplitude whichever is less).
pdficon Capacitive Loads Application Note

When there is significant capacitance in a reed sensor reed relay or reed switch circuit the peak current and energy switched by the reed contacts should be considered.
pdficon Reed Switch Extended Shock Capabilities Application Note

The maximum shock specifications in the Littelfuse catalog are very conservative for most switches smaller than the DRxxxx type. T
pdficon Rice Cooker Lid Lock Application Note

The position sensing lid lock ensures that the lid is securely locked in place.
pdficon Flow Sensing in Tankless Water Heaters Application Note

Reed switches and sensors are highly effective solutions for flow sensing applications that can be used for detecting the presence of fluid flow in a system or even measure the rate of fluid flow.
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 CoC_RoHS10_59040-1-U-02-A REACH209_Declaration_59040-1-U-02-A Yes
03/11/2018		 Does not Contain
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.