MJ1 Limit Switches

MJ-1 side mount switches are offered with or without actuator seal boots
Both have a combination insulator seal cemented inside the bottom enclosure. Lead washers are used to seal the mounting holes on side mount switches.

The elastomer boot on sealed actuator versions and cover seal on all switches protect the actuating mechanism and the internal basic switch from contaminations.

All side mount switches are stalled with M4 screws Removal of the bottom enclosure exposes the terminals for easy wiring

Features :

  • Side mount switches.
  • Momentary contacts.
  • Level or plunger operation.
  • Regular or sealed operating heads.
  • Completely sealed construction.
  • 1/2 ” conduit entry, captive cover screws.
  • Dustproof, Oil-Tight, Water-Resistant
  • Temperature range +15 ° F to +175 ° F (-10 ° C to +80 ° C)


15 A125, 250 V AC
1/8  HP125 V AC
1/4  HP250 V AC
1/2 HP125 V DC
1/4 A250 V DC



Operating speed0.01mm  to 1m/sec
Operating frequencyMechanically : 240 operations/min.
Electrically : 20 operations/min.
Contact resistance15m Ω max.(initial)
Insulation resistance100M Ω min (at 500 VDC)
Dielectric strength1,000 VAC, 50/60 Hz for 1 minute between non-continuous terminals
2,000 VAC, 50/60 Hz for 1 minute between current-Carrying part and ground.
VibrationMalfunction durability:10 to 55Hz 1.5mm double amplitude.
ShockMechanical durability:
Approx.1,000m/sec2 (approx. 100G’s)
Malfunction durability:Approx.300m/sec2 (approx.30 G’s)
Ambient operating temperatureOperating : -10 ° C to +80 ° C
HumidityGeneral purpose type : 85% RH max
Sealed type : 95% RH
Service lifeMechanically : 20,000,000 operations min
Electrically : (1.7A, 110VAC)MAX
500,000 operations min.
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