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

4.7.14 Isolation (when specified) (see 3.20). The capacitance shall be measured using MIL-STD-202, method 305.

The following details apply:

Test frequency: 1 kilohertz (kHz).

Points of measurement: Between all isolated terminals.

4.7.15 Resistance to soldering heat (when specified) (see 3.21). SSR's shall be tested in accordance with

MIL-STD-202, method 210. The following details and exceptions shall apply:

Depth of immersion in molten solder: Within .060 inch �.020 inch of the SSR base.

Test condition: B.

Measurements after test: Insulation resistance and DWV as specified in 4.7.5 and 4.7.6.

Examination after test: As specified in 4.7.12e.

4.7.16 Salt atmosphere (corrosion) (see 3.22). SSR's shall be tested as specified in 4.7.16.1 or, when specified

(see 3.1), in accordance with 4.7.16.2.

4.7.16.1 Salt atmosphere (corrosion) (when specified, see 3.1). SSR's shall be tested in accordance with

MIL-STD-750, method 1041. Examination after test shall be as specified in 4.7.16.2c.

4.7.16.2 Salt spray. SSR's shall be tested in accordance with method 101 of MIL-STD-202. The following details

and exceptions shall apply:

Applicable salt solution: 5 percent.

Test condition: B.

Examination after test: SSR's shall be examined for evidence of peeling, chipping, or blistering of the finish,

and exposure of base metal due to corrosion.

4.7.17 Life (see 3.23). SSR's shall be subjected to the following procedures:

With the SSR's mounted in accordance with 4.7.10b, they shall be operated for 48 hours in accordance with

4.7.2.5, except the duration of the turn-on shall be 50 percent �5 percent of each operation of the SSR. The

ambient temperature of the SSR environment shall be maintained at the highest specified operating

temperature (see 3.1). Repeat as above for 48 hours, except with the ambient temperature at the lowest

specified operating temperature. Repeat as above for 48 hours, except with the temperature at room

ambient.

Same as 4.7.17a, except with the maximum turn-off voltage continuously applied to the input. SSR's shall

be monitored to verify that they remain turned off.

Same as 4.7.17b above, except with the minimum turn-on voltage continuously applied to the input. SSR's

shall be monitored to verify that they remain turned on.