Key Specifications Parameter Value/Description Manufacturer Omron Automation and Safety Part Number Z-15GW255-B Series Z Series Type General-purpose Basic Switch / Limit Switch Actuator Type Hinge Roller Lever (Stainless Steel lever, Plastic roller, φ9.5 x 4 mm) Contact Form SPDT (Single Pole Double Throw) / 1 pole Terminal Type Screw terminal (M4) Contact Gap 0.5 mm (standard) Degree of Protection Equivalent to IP62 (drip-proof type, excluding terminals) RoHS Compliant Yes Contact Ratings Rating Type Value Rated Current 15 A Max. Switching Voltage (AC) 500 VAC Max. Switching Voltage (DC) 250 VDC Mechanical Specifications (with Hinge Roller Lever) Parameter Value Operating Force (OF) 1.27 N max. (130 gf) Release Force (RF) 0.21 N min. (21 gf) Pretravel (PT) 7.1 mm Movement Differential (MD) 1.6 mm max. (0.062") Over-Travel (OT) 4 mm min. (0.158") Free Position (FP) 36.5 mm max. Operating Position (OP) 29.4 to 31 mm (standard 30.2 mm) Performance & Life Parameter Value Electrical Life (Min.) 500,000 operations Mechanical Life (Min.) 10,000,000 operations Permissible Operating Freq. (Electrical) 20 operations/min max. Permissible Operating Freq. (Mechanical) 240 operations/min max. Contact Resistance (Initial) 15 mΩ max. Insulation Resistance 100 MΩ min. (at 500 VDC) Dielectric Strength Test Condition Value Between terminals of same polarity 1,000 VAC, 50/60 Hz for 1 min Between live-metallic part and ground 2,000 VAC, 50/60 Hz for 1 min Between terminal and non-live-metallic part 2,000 VAC, 50/60 Hz for 1 min Environmental & Physical Specifications Parameter Value Ambient Operating Temperature -15°C to +80°C (with no icing) Ambient Operating Humidity 35% to 95% Vibration Resistance (Malfunction) 10 to 55 Hz, 1.5 mm double amplitude (malfunction: 1 ms max.) Shock Resistance (Destruction) 1000 m/s²