Key Specifications Parameter Value/Description Manufacturer Omron Automation and Safety Part Number Z-15ESR Series Z Series Type General-purpose Basic Switch / Snap Action Switch Actuator Type Slim spring plunger (φ4 dia., stainless steel plunger, plastic reset button) Contact Form SPDT (Single Pole Double Throw) / 1 pole Switch Function On-On Termination Style Solder terminal Contact Gap 1.8 mm (high-capacity type) Degree of Protection IP00 Protection Against Electric Shock Class I RoHS Compliant Yes Contact Ratings Rating Type Value Rated Current 15 A (AC/DC) Max. Switching Voltage (AC) 500 VAC Max. Switching Voltage (DC) 250 VDC Inrush Current (NC) 30 A max. Inrush Current (NO) 15 A max. Contact Material Silver (rivet type, Ag) Mechanical Specifications (Spring Plunger) Parameter Value Operating Force (OF) 2.65 N max. Release Force (RF) 2.79 N max. (reset button) Pretravel (PT) 0.4 mm max. Over-Travel (OT) 1.6 mm min. Operating Position (OP) 27.7 to 28.7 mm Free Position (FP) 29.8 mm max. (reference) Performance & Life Parameter Value Electrical Life (Min.) 100,000 operations Mechanical Life (Min.) 300,000 operations Permissible Operating Freq. (Electrical) 20 operations/min max. Permissible Operating Freq. (Mechanical) 240 operations/min max. Permissible Operating Speed 0.01 mm/s to 1 m/s Contact Resistance (Initial) 15 mΩ max. Insulation Resistance 100 MΩ min. (at 500 VDC) Dielectric Strength Test Condition Value Between terminals of same polarity 1,500 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 -25°C to +80°C (with no icing) Ambient Operating Humidity 35% to 85% Vibration Resistance (Malfunction) 10 to 55 Hz, 1.5 mm double amplitude (malfunction: 1 ms max.) Shock Resistance (Destruction) 1000 m/s² Proof Tracking Index (PTI) 175 Weight Approx. 26 g to 35 g Dimensions (L x W x H) 49.2 x 17.45 x 21.4 mm