Key Specifications Parameter Specification Series D4N Switch Type Safety Limit Switch Actuator Adjustable roller lever, form lock (metal lever, rubber roller, 50 mm dia. × 8 mm) Operating Mechanism Snap-action Contact Form 1NC / 1NO (DPST-NO/NC) Conduit Size M20 (1-conduit) Termination Style Screw Terminal Degree of Protection IP67 (Dust-tight and waterproof) Housing Material Plastic (Double-insulated, Class II) Operating Temperature -30°C to 70°C (with no icing) Electrical Ratings Parameter Specification Rated Voltage (AC) 240 VAC Rated Voltage (DC) 250 VDC Current Rating (AC) 3 A at 240 VAC (max 10A at 240VAC) Current Rating (DC) 270 mA at 250 VDC Contact Resistance (Initial) 25 mΩ max. Insulation Resistance 100 MΩ min. (at 500 VDC) Impulse Withstand Voltage Between same polarity terminals: 2.5 kV Between different polarity terminals: 4 kV Between terminal and non-live metal part: 6 kV Mechanical Characteristics Parameter Value Operating Force (OF) 4.5 N max. Release Force (RF) 0.4 N min. Pre-Travel (PT) 18° to 27° Movement Differential (MD) 14° max. Over-Travel (OT) 40° min. Total Travel (TT) 80° (reference value) Direct Opening Force 20 N min. (EN60947-5-1) Direct Opening Travel 50° min. (EN60947-5-1) Max. Operating Speed 1 mm/s to 0.5 m/s Permissible Operating Frequency 30 operations/min max. Durability Parameter Value Mechanical Durability 15,000,000 operations min. Electrical Durability 300,000 operations min. Vibration (Malfunction) 10 to 55 Hz, 0.75 mm single amplitude Shock (Destruction) 1,000 m/s² Shock (Malfunction) 300 m/s² Dimensions Parameter Value Body Width 30 - 31 mm Body Height 48.2 - 57.5 mm Body Depth 82.5 mm Mounting Hole Pattern 22 mm × 47 mm Weight Approx. 149 - 150 g