MS Series - High-Speed Fuse Microswitch

Series: MS
Questions? Contact Littelfuse Support
Littelfuse Microswitch Series
Roll Over to Zoom

Littelfuse MS Series external mount Microswitches offer permanent blown fuse indication to PSR Series High-Speed Square-Body Semiconductor Fuses. They have one normally open (N.O.) and one normally closed (N.C.) contact rated for 4A, 250Vac.

These microswitches have a visual red flap or arm indicator that releases after fuse blown condition and can also be used for resetting the microswitch contacts.


  • Available in two sizes to fit PSR Series Fuse Case Sizes 30 - 33 and 70 - 73
  • Internal microswitch UL Listed
  • Red flap visual indicator and contact reset mechanism
  • Minimum positive operating voltage and current at 4V/1mA

Access specifications, certifications, check availability and order parts below

Catalog #StockSamples

  • Showing 1 items