MDSM-DTR-20-25 - MDSM-DT Series

Series: MDSM-DT
Questions? Contact Littelfuse Support
Reed_Switches_MDSM_DT_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, surface mount, changeover switch with a 14.73mm long x 2.54mm diameter (0.580" x 0.100") glass envelope. Capable of switching 175Vdc at 5W. Available sensitivity range of 15-30 AT. Insulation resistance of 1 Gigaohm minimum and contact resistance of less than 100 milliohms. Available in surface mount version (MDRR-DT). Ideally suited for reed relays, security, limit sensing, telecom and office equipment. Available in bulk packaging or tape and reel.

Features:

  • Miniature, surface mount SPDT changeover switch capable of switching 175Vdc or 0.25A at up to 5 Watts
  • Available sensitivity range of 15-30 AT

Benefits:

  • Hermetically sealed switch contacts are not affected by and have no effect on their external environment
  • Can be used as changeover or normally closed contact
  • Zero operating power required for contact closure
  • Excellent for switching micro-controller logic level loads

Applications:

  • Position sensing
  • Industrial controls
  • Office equipment
  • Home appliances
Check Stock Order Samples
Property (Mouseover for details) Value
Switching Power (W) 5
Switching Voltage (V DC) 175
Switching Current (A DC) 0.25
Breakdown Voltage (V DC) 200
Max Contact Resistance (Ω) 0.1
Magnetic Sensitivity (AT) 20 to 25
Body Length (mm) 14.73
Overall Length (mm) 25.4
Switch Type C:SPDT-CO
Switching Voltage (V AC) 120
Switching Current (A AC) 0.18
Max Operate Time (ms) 0.7
Max Release Time (ms) 1
Resonant Frequency (kHz) 11
Partner ECAD Models MDSM-DTR-20-25
Operating Temperature -40° to 125°C

URicon UR_NWFW2_E471070

CRUicon CUR_NQMJ8_E471070

pdficon Reed Switch Selection Guide

A quick reference guide to selecting reed switches for electronic applications
pdficon Littelfuse Reed Switches MDSM-DT datasheet

pdficon Soldering Temperatures Application Note

This application note applies to all of Littelfuse?s products that are normally soldered to printed circuit boards (PCBs) including all reed switches.
pdficon Extreme Temperature Reed Switch Operation Application Note

Littelfuse reed switches are normally specified to operate in a temperature range of -40 ?C to +125 ?C. T
pdficon Catalog Glossary Reed Switch Terms Application Note

Reed Switch Terms Glossary
pdficon Ampere turn versus mT and Gauss Application Note

What is the relationship between AT (Ampere*turn) and Tesla or Gauss? What magnet strength will activate a 15 AT reed switch at 5 mm?
pdficon Storage of Littelfuse Sensor Parts Application Note

The data sheets for Littelfuse parts show temperature ranges for storage. However long term exposure to extreme temperatures in the specified storage temperature range may degrade solderability of terminals.
pdficon Handling of Reed Sensors Relays And Switches Application Note

When used within their capabilities Littelfuse reed sensors reed relays and reed switches provide many years of robust performance
pdficon Measuring Reed Switch Sensitivity and Contact Resistance Application Note

The purpose of this application note is to document the preferred method of reading the sensitivity and contact resistance of Littelfuse reed switches.
pdficon Modifying Reed Switches Application Note

When cutting and forming reed switch leads it is important to use the correct support and cutting tools to avoid causing damage to the glass-to-metal hermetic seals.
cURicon cUR_NRNT8_E47258_100213440

URicon UR_NRNT2_E47258_100213440

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.
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
MDSM-DTR-20-25 MDSM-DTR 20-25 RoHS No 04/19/2016 PbFree No 04/19/2016 CoC_RoHS10_MDSM-DTR-20-25 REACH_SVHC Declaration_MDSM-DTR-20-25 Yes
04/19/2016		 Does not Contain IPC_MDSM-DT
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.