MIL-PRF-28750 Relays, Solid State, General Specification ForThis specification covers the general requirements for hermetically sealed or encapsulated solid-state relays \(SSR\'s\) \(see 6.1\), incorporating semiconductor, microelectronic, and passive circuit devices.

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MIL-PRF-28750F

3.13.26 Minimum load current rating (ac SSR's only) (when specified, see 3.1). When SSR's are tested as

specified in 4.7.7.20, the SSR shall remain ON.

3.13.27 Exponential rate of voltage rise (when specified, see 3.1 and 6.11). When SSR's are tested as specified in

4.7.7.21, they shall withstand the specified rate of voltage rise (see 3.1).

3.13.28 Zero crossover (ac SSR's only) (when specified, see 3.1). When SSR's are tested as specified in 4.7.7.22,

the SSR turn-on shall occur within the specified (see 3.1) zero voltage crossover, and SSR turn-off shall occur within

the specified (see 3.1) zero current crossover.

3.13.29 Electrical system spike (when specified, see 3.1). When SSR's are tested as specified in 4.7.7.23, they

shall withstand the voltage specified without damage.

3.13.30 Overload (non-short circuit protected SSR's only) (when specified, see 3.1). When SSR's are tested as

specified in 4.7.7.24, they shall withstand the specified overload without damage.

3.13.31 Power dissipation (when specified, see 3.1). When SSR's are tested as specified in 4.7.7.25 the power

dissipation shall not exceed the specified value (see 3.1).

3.13.32 Electromagnetic interface (when specified, see 3.1). When solid state relays are tested as specified in

4.7.7.26 the conducted emission shall not exceed the specified value (see 3.1).

3.14 Resistance to solvents. When SSR's are tested as specified in 4.7.8, the marking shall remain legible.

3.15 Shock (specified pulse). When SSR's are tested as specified in 4.7.9, there shall be no evidence of physical

or mechanical damage.

3.16 Vibration. When SSR's are tested as specified in 4.7.10, there shall be no evidence of physical or mechanical

damage.

3.17 Terminal strength. When SSR's are tested as specified in 4.7.11, there shall be no evidence of loosening or

breaking of the terminals; and there shall be no deformation to the threads of screw terminals; no damage to the

insulating base of plug-in SSR's; nor shall there be any other damage which would adversely affect the normal

operation of the SSR. Bending of solder terminals shall not be construed as damage; bending of plug-in terminals

shall not be construed as damage, provided they can be reformed in a manner to permit proper mating with the

applicable sockets.

3.18 Moisture resistance (applicable to nonhermetically sealed SSR's only). When SSR's are tested as specified

in 4.7.12, there shall be no evidence of breaking, cracking, chipping or flaking of the finish, or loosening of the

terminals. After the 24-hour drying period, SSR's shall meet the following requirements:

Insulation resistance: As specified in 3.11.

DWV: As specified in 3.12.

Input turn-off voltage: As specified in 3.13.4.

Input turn-on voltage: As specified in 3.13.3.

Output voltage drop: As specified in 3.13.21.