... -5A,VFS-201,KH8012,LT2(),F2-Q,YDT1-15,YDT1-16,YDT1-17,FS-37,YDT1-101,MD-18S,MD-19 ... conditions1, surrounding air temperature does not exceed + 40 °C, lower limit for - 5 °C;2, installation site does not exceed altitude 2000m ... , air relative humidity of air temperature + 40 °C when does not exceed 50%,in the ambient4, pollution levels of switch prescribed for ...