Made up of zinc alloy and reinforced plastics; Small waterproof and oilproof; Hidden within the micro switch; Longer lifetime; With a larger OT action; Easy wiring duct design; Convenient to operate; Operating speed: 0.5 mm to 50 cm/SEC; Operating frequency: mechanical: 120 times/min electric: 30 times/min; Contact resistance: below 25mohm(early); Insulation resistance: more than 100mohm (under 500V DC); Withstand voltage: terminal of homopolar: AC1000V 50 / 60Hz lasts for 1min; Vibration: 10~55Hz 1.5 mm double amplitude; Impact: mechanical endurance: 1 000m/Sec (about 100G'S above); False action: 300m/Sec (about 30 g 'S above). Temperature: - 5~+ 65'C; Humidity: < 95% RH; The service life of the mechanical: more than 10000000 times; Electrical: more than 500000 times; Waterproof grade: IP65.