Emergency push button switches
1) mounting size: 22mm
2) operational voltage: 380ac or 220dc
3) operational temperation: -25 to +70
4)operational humidity: 45% to 90%
5) power-frequency withstand voltage: 2500v ac, 1min
6) contact resistance: 50m
7) mechanical durability: monentary 1000, 000, maintained 250, 000
8) electrical durability: 500, 000
9) protection grade: ip65