DRR-DTH Series - 39.7mm High Voltage Changeover Reed Switch

Series: DRR-DTH
Obsolete: 2017 -07-17 Replaced ByDRS-DTH series
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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.

A standard changeover switch with a 39.67mm long x 5.33mm diameter (1.562" x 0.210") glass envelope, capable high voltage and power switching up to 500Vdc at 30W. Minimum breakdown voltage of 1200Vdc. Available sensitivity range of 50-80 AT. Insulation resistance of 1 Gigaohm minimum and contact resistance of less than 125 milliohms. Ideally suited for security, limit sensing, industrial, white goods and automotive applications.


  • Changeover switch capable of switching 500Vdc or 0.5A at up to 30 Watts
  • Minimum breakdown voltage of 1200Vdc
  • Available sensitivity range of 50-80 AT


  • 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
  • Capable of switching global mains voltage
  • Zero operating power required for contact closure


  • Security
  • Limit switching
  • Industrial safety
  • White goods

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 TemperatureCompare
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-50-55
305000.512000.12550 to 5539.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-50-60
305000.512000.12550 to 6039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-50-80
305000.512000.12550 to 8039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-55-60
305000.512000.12555 to 6039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2017 -08-22
Replaced By: DRS-DTH-55-65
305000.512000.12555 to 6539.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-65-70
305000.512000.12565 to 7039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-65-80
305000.512000.12565 to 8039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-70-75
305000.512000.12570 to 7539.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-70-80
305000.512000.12570 to 8039.6785.73C:SPDT-CO-20° to 125°C
Obsolete: 2018 -01-07
Replaced By: DRS-DTH-75-80
305000.512000.12575 to 8039.6785.73C:SPDT-CO-20° to 125°C

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pdficon Catalog Glossary Reed Switch Terms Application Note

Reed Switch Terms Glossary

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 Handling of Reed Sensors Relays And Switches Application Note

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When a reed switch or reed sensor is used to control an inductive device (relay coil solenoid transformer small motor etc.)

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.

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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.

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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 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 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 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 Littelfuse Reed Switches DRR-DTH datasheet

Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
DRR-DTH-55-60 DRR-DTH 1408 55-60 RDSW RoHS No 04/19/2016 PbFree No 04/19/2016 CoC_RoHS10_DRR-DTH-55-60 REACH181_Declaration_DRR-DTH-55-60 Yes
Does not Contain
DRR-DTH-65-70 DRR-DTH 1408 65-70 RoHS No 04/19/2016 PbFree No 04/19/2016 Yes
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