MIL-DTL-21604 Switches, Rotary, Multipole And Selector; General Specification ForThis specification covers the general requirements for closed construction rotary multipole and selector switches which are able to make, break, and carry electrical loads up to and including 10 amperes.

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MIL-DTL-21604F

3.10 Dielectric withstanding voltage. Switches shall withstand the application of the specified voltages without

arcing, breakdown of insulation, or damage, and there shall be no leakage current greater than 100 microamperes

(see 4.8.6).

3.11 Insulation resistance. The insulation resistance shall be greater than 200 megohms (see 4.8.7).

3.12 Contact resistance. The contact resistance shall not exceed 10 milliohms (see 4.8.8).

3.13 Endurance. Switches shall be electrically and mechanically operative during and after the tests specified in

4.8.9.1 and 4.8.9.2, and the contact resistance shall not exceed 10 milliohms. Each mating contact shall make and

break at the proper time throughout the test. After the test, there shall be no evidence of broken, loose, deformed, or

displaced parts.

3.14 Temperature rise. The temperature rise (see 4.8.10) shall be within the limits specified (see 3.1 and 6.2).

3.15 Vibration. There shall be no opening of closed contacts in excess of 10 microseconds (see 4.8.11) and there

shall be no change in shaft position, or evidence of broken, loose, deformed, or displaced parts.

3.16 High-impact shock. Mating closed contacts shall not open for a period of time longer than 20 milliseconds

and there shall be no change in shaft position, or evidence of broken, loose, deformed, or displaced parts (see

3.17 Moisture resistance. The insulation resistance, immediately after conclusion of the test specified in 4.8.13

and while the switches are still in the humidity chamber, shall be greater than 100 megohms. At the end of the drying

period, the insulation resistance shall be greater than 100 megohms. At the conclusion of the test there shall be no

evidence of corrosion, breaking, cracking, spalling, or loosening of hardware, and the mounting and terminal

hardware shall be readily removable.

3.18 Salt atmosphere (corrosion). There shall be no evidence of excessive corrosion (see 4.8.14). Excessive

corrosion is defined as corrosion which interferes with the electrical or mechanical performance, or, in the case of

plated metals, corrosion which has passed through the plating and exposed the base metal. After the test, mounting

and terminal hardware shall be readily removable.

3.19 Seal (applicable to style JF switches only). There shall be no evidence of leakage along the shaft or around

the bushing (see 4.8.15).