59140-4-U - 59140 Series

Series: 59140
Questions? Contact Littelfuse Support
littelfuse_reed_sensors_59140_hi_res
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.

A miniature flange mount reed sensor occupying only 3.22cm2 (0.500in2) board space with a choice of normally open, normally open high-voltage, normally closed or changeover contacts. Its case design enables screw or adhesive mounting. Wires exit from top right-hand side. Also available with left-hand exit (59141 series). Capable of switching up to 265Vac/300Vdc at 10VA. Available with a range of sensitivity and cable length options. Ideally suited for position and limit sensing, security, window and door alarm systems and linear actuator applications. Functions best with the 57140 or 57141 actuator.

Note: The 57140 and 57141 actuators are sold separately.

Features:

  • Magnetically-operated proximity sensor
  • Operates through non-ferrous materials such as wood, plastic or aluminum
  • Compact size requires only 3.2cm2 board space
  • Screw-down or adhesive mounting
  • Customer-defined sensitivity
  • Choice of cable length and connector

Benefits:

  • Well suited for usage in high-moisture and contaminated environments
  • Reed contacts last for millions of operating cycles under micro-controller voltage and current logic-level loads
  • Simple installation and adjustment

Applications:

  • Position and limit switching
  • Security
  • Linear actuators
  • Door switch
Order Samples

Application Spotlight


Save
Save
Property (Mouseover for details) Value
Switching Power (W) 5
Switching Voltage (V DC) 175
Switching Current (A DC) 0.25
Switching Voltage (V AC) 120
Switching Current (A AC) 0.18
Breakdown Voltage (V DC) 200
Max Contact Resistance (Ω) 0.2
Magnetic Sensitivity (AT) 25 to 30
Nominal Activate Distance (mm) 10
Switch Type B:SPST-NC
Max Operate Time (ms) 3
Max Release Time (ms) 3
Operating Temperature -40° to 105°C

cRUicon CUR_NKCR8_E61760

URicon UR_NKCR2_E61760

pdficon Littelfuse Reed Sensors 59140 datasheet

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 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.
pdficon Littelfuse Door and Window Sensor Design Guide

Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
59140-4-U-02-A 59140-4-U-02-A SENS RoHS No 02/21/2019 PbFree No 02/21/2019 CoC_RoHS10_59140-4-U-02-A REACH209_Declaration_59140-4-U-02-A No
02/21/2019		 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.