POWR-SPEED
®
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MS SERIES HIGH-SPEED FUSE MICROSWITCH
Description
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.
Features/Benefits
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
1000C Contact Insulation Voltage (1000, 1500)
Electrical Characteristics
Specifications
Voltage Rating See Electrical Characteristics Table
Amperage Rating See Electrical Characteristics Table
Interrupting Rating See Electrical Characteristics Table
-60ºC to +125°C
Relative Humidity 95%
Contact Silver-Nickel Plated Brass
Approvals Internal Microswitch Part Number:
U83161.8, Listed Under UL File: E42016
Flammability UL 94 V2
Environmental RoHS Compliant
Country of Origin China
Ordering Information
SERIES CASE SIZE
CONTACT
INSULATION
VOLTAGE
CATALOG
NUMBER
ORDERING
NUMBER
MS 3H 1000C MS3H1000C MS3H1000C
MS 7H 1000C MS7H1500C MS7H1500C
CATALOG
NUMBER /
ORDERING
NUMBER
INDICATING
STYLE
INSULATION
VOLTAGE
RATING
(VAC)
FUSE
CASE
SIZE
POSITIVE
OPERATING
MIN VOLTAGE /
MIN CURRENT
INTERRUPTING RATING
RELATIVE
HUMIDITY
CURRENT
NON-INDUCTIVE
LOAD
INDUCTIVE LOAD
(DC L /R=25MS)
30V 110V 250V 30V 110V 250V
MS3H1000C*
Standard
NO-NC
1000 30-33
4V / 1mA
AC (50/60 Hz) 5A 5A 5A 5A 5A 4A
95%
DC 5A 0.6A 0.3A 3A 0.2A 0.1A
MS7H1500C*
Standard
NO-NC
1500 70-73
AC (50/60 Hz) 5A 5A 5A 5A 5A 4A
95%
DC 5A 0.6A 0.3A 3A 0.2A 0.1A
* Contains internal microswitch (Part Number: U83161.8), listed under UL File: E42016.
