Description
Littelfuse MS series external mount microswitches offer
permanent blown fuse indication to PSR and PSX series
high-speed square-body semiconductor fuses. They have
one normally open (N.O.) and one normally closed (N.C.)
contact rated for 4 A, 250 V ac.
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.

Features/Benefits
 Available in three sizes to fit PSR and PSX series fuses
 Internal microswitch UL recognized
 Red flap visual indicator and contact reset mechanism

Specifications
Voltage Rating See Electrical Characteristics table
Amperage Rating See Electrical Characteristics table
Operating Temperature -10 °C to +125 °C
Relative Humidity 85 %
Contact Silver-nickel plated copper
Approvals Internal microswitch part number:
MS1-16Z0-A150, recognized under
UL File: E176213
Flammability UL 94 V0
Environmental RoHS Compliant
Country of Origin China