scope:

This specification covers the general requirements for metallic-element actuated, thermostatic switches intended primarily for use in electrical and electronic equipment, in alternating current (ac) and direct current (dc) applications, where temperature protection, overhear detection, or accurate temperature control of an enclosure is required. The operating temperatures and operating temperature ranges of switches covered by this specification shall be as specified (see 3.1 and 6.1.2).

Switches covered by this specification shall be classified by type and class as indicated herein (see 3.1 and 6.1.2).

Type I - Snap action, make and break operation. Type II - Slow make and break operation. Class 1 - Altitude - Sea level to 10,000 feet. Vibration - 10-55 Hertz (Hz), .06 double amplitude. Shock - 75G, 6 milliseconds (ms). Class 2 - Altitude - Sea level to 10,000 feet. Vibration - 10-55 Hz, .06 double amplitude. Shock - High impact. Class 3 - Altitude - Sea level to 70,000 feet Vibration - 10-500 Hz, 10G. Shock - 75G, 6 ms. Class 4 - Altitude - Sea level to 70,000 feet. Vibration - 10-2,000 Hz, 20G. Shock - 100G, 6 ms. Class 5 - Altitude - Sea level to 100,000 feet. Vibration - 10-3,000 Hz, 50G. Shock - 500G, 1 ms. * Class 6 - Altitude - Sea level to 100,000 feet. Vibration - 10-2,000 Hz, 30G. Shock - 100G, 6 ms.