1The switch is a normally closed switch.The connection will not be disconnected until the temperature standard is reached, otherwise it will be connected 2The contact can endure 220VAC 1.5A or 24VDC 1.5A voltage. 3More than 50MOhm in ambient temperature and moisture of insulation resistance,more safe. 4Stable performance, high precision, small size, light weight. 5Suitable for power supply, testing equipment, refrigeration, air conditioning, printed circuit board. 6High reliability, long life, and little interference to the radio.