GB5-AA51 CNGAD GB5 series flush momentary button switch 

1) Operational Voltage: No exceed than 380AC or no exceed than 220DC
2) Operational temperation: -25 to +70
3) Operational humidity: 45% to 90%
4) power-frequency withstand voltage: 2500V AC, 1min
5) contact resistance: No exceed than 50mΩ 
6)Mechanical durability: Monentary 1000, 000, maintained 250, 000
7) Electrical durability: 500, 000
8) Protection grade: IP65

9) Certificate: CCC, CE