MIL-DTL-19648E
4.7.7.3 Solder and plug-in terminals greater than 0.047 inch diameter. A pull force of 10 ±1 pounds
shall be applied to each terminal in any one direction 45 ±5 degrees from the normal axis of the terminal
for a period of 15 to 30 seconds. The force shall be applied to solder terminals at the point where
connections would normally be made or to plug-in terminals in the last one-fourth of length.
4.7.8 Thermal shock (see 3.11). Relays shall be tested in accordance with method 107 of MIL-STD-
202. The following details and exceptions shall apply:
a. Test condition - A (for class A relays);
B (for class B relays).
b. Measurements before, during, and after test - Before and after thermal shock test, normal operate
time shall be tested as specified in 4.7.3.2. During the last cycle of the test, the relay shall be
subjected to the low and high temperature extremes for 90 minutes each with the heater
unenergized. Within the last 10 minutes of each 90-minute period, normal operate time shall be
tested as specified in 4.7.3.2, except ambient temperature shall be as specified above.
4.7.9 Shock (see 3.12). Relays shall be tested in accordance with 4.7.9.1 or 4.7.9.2, as specified (see
3.1 and 6.2.1).
4.7.9.1 Method I. Relays shall be tested in accordance with method 213 of MIL-STD-202. The
following details and exceptions shall apply:
a. Mounting - Normal mounting means.
b. Test condition level - see 1.2.2.1.
c. Measurements during test - Relays shall be monitored for closing of open contacts or opening of
closed contacts in excess of 10 microseconds in accordance with method 310, test circuit A, of MIL-
STD-202.
d. Electrical operating conditions - For each direction of shock, the heater shall be unenergized during
two shocks and energized during one shock with rated heater voltage for 15 times normal operate
time plus 5 minutes before test.
e. Measurements after shock - As specified in 3.12.
4.7.9.2 Method II. Relays shall be tested in accordance with method 207 of MIL-STD-202. The
following details and exceptions shall apply:
a. Mounting - Normal mounting means.
b. Test condition - See table I of 1.2.2.1.
c. Measurements after test - As specified in 3.12.
4.7.10 Centrifugal acceleration (when applicable) (see 3.13). Relays shall be tested in accordance
with 4.7.10.1 or 4.7.10.2, as specified (see 3.1 and 6.2.1).
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