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Safety Limit Switch


Small safety limit switch, Plunger, 2NC/1NO (MBB contact) (slow-action), Pg13.5

Actuator Plunger
Operating mechanism Slow action
Contact form 2NC/1NO (MBB contact)
Degree of protection IP67

Item list of D4N

  • Ratings / Performance
Operating mechanismSlow action
ctuatorPlunger 6 dia.
Resin plunger
Frequency50/60 Hz
Contact form2NC/1NO (MBB contact)
LoadGeneral load/Micro load
Number of conduit: 1
Ambient temperatureOperating: -30 to 70 ℃ (with no icing)
Ambient humidity95 %RH max.
Permissible operating frequency30 operations / 1 minute max.
Contact resistance (Initial value)25 mΩ max.
Insulation resistance100 MΩ min.
Impulse withstand voltageBetween each terminal of the same polarities: 2.5 kV
Between each terminal of the different polarities: 4 kV
Between each terminal and non-live-metallic part: 6 kV
DurabilityMechanical: 15,000,000 operations min.
Vibration resistanceMalfunction: 10 to 55 Hz, 0.75 mm single amplitude
Shock resistanceDestruction: 1000 m/s2
Malfunction: 300 m/s2
Degree of protectionIP67
Classification of protection against electric shockClass II (Double insulation)
Operating Force (OF)Standard value 6.5 N max.
Release Force (RF)Standard value 1.5 N min.
Pre-Travel (PT)NC: 2.8 mm max.
NO: Reference value 1 mm
Over-Travel (OT)Standard value 4 mm min.
Operating Position (OP)Standard value 17.4±0.5 mm
Total Travel (TT)Reference value 6 mm
Direct Opening ForceStandard value 20 N min.
Direct Opening TravelStandard value 3.2 mm min.
  • Dimensions

Mounting hole dimensions

  • Circuits configuration


Safety Limit Switch