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|  MIL-R-5757H
4.6.10 Shock (specified pulse) (see 3.12). Unless otherwise specified (see 3.1), relays shall be tested
in accordance with method 213 of MIL-STD-202. The following details and exceptions shall apply:
a. Mounting method: For relays having flanges or studs, mounting shall be by the flanges or studs;
and for relays without flanges, mounting shall be by plugging into sockets, or other suitable means
approved by the qualifying activity.
b. Test condition: A, B, or C, as applicable (see 3.1).
c. Electrical-load conditions: In each direction of shock, the coil shall be de-energized during two
shocks and energized with rated voltage (or current) during one shock.
d. Measurements during shock: Contacts shall be monitored with an adequate test circuit as
approved by the qualifying activity. The test circuit shall verify that no opening of closed contacts
in excess of 10 s and no false closure or bridging of open contacts occurs in excess of 1 s.
The contact load shall be 10 mA maximum at 6 V maximum (dc or peak ac).
e. Examination after test: Relays shall be examined for evidence of structural failure or other
damage which might impair the operation of the relay.
4.6.11 Vibration (see 3.13).
4.6.11.1 Vibration (sinusoidal). Unless otherwise specified (see 3.1), relays shall be tested in
accordance with method 204 of MIL-STD-202. The following details and exceptions shall apply:
a. Method of mounting: As specified in 4.6.10a.
b. Electrical-load conditions: For qualification and group C inspections, relays shall be tested with
the coil energized for 2 hours at rated voltage (or current) and with the coil de-energized for 2
hours, in each of the three mutually perpendicular (x, y, and z) directions. Contacts shall be
loaded as specified in 4.6.10d.
c. Test condition: D, except vibration level is the lesser of .195 inch (4.95 mm) double amplitude or
30 G, and frequency range is 10 Hz to 3,000 Hz.
d. Measurements during vibration: As specified in 4.6.10d.
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