MIL-PRF-14409J
4.5.16 Moisture resistance (see 3.19). Capacitors shall be tested in accordance with method 106 of MIL-STD-
202. The following details and exceptions shall apply:
a. Mounting: Capacitors shall be mounted by their normal mounting means and set at approximately 75
percent of maximum rated capacitance.
b. Polarization and loading voltage: Not applicable.
c. Final measurements: Upon completion of step 6 of the final cycle, capacitors shall be maintained at a
temperature of +25°C +10°C, -5°C and a relative humidity of 50 ±5 percent for a period of 4 to 24 hours.
Insulation resistance, dielectric withstanding voltage, and driving torque at room ambient temperature shall
After completion of test, capacitors shall be examined for evidence of corrosion.
4.5.17 Terminal strength (see 3.20). A load shall be gradually applied perpendicular to the initial position of the
wire lead in the opposite direction of the winding (or perpendicular to the center line for flat and printed circuit
terminals) until the applied load reaches 2 pounds. The 2-pound load shall be applied for at least 5 seconds at a
point within .25 inch (6.35 mm) of the open end of the wire lead and printed circuit terminals and from the lead hole
itself in the flat terminals. The capacitors shall then be examined for evidence of lead separation, loosening or
rupturing of the terminal, and any other damage to terminals and the capacitor body.
4.5.17.1 Bend test (wire leads only). Leads shall be clamped .25 inch (6.35 mm) from the body of the capacitor
and shall be bent at an angle 90° each side of the center (total -180°) 3 times. The radius of curvature at the 90°
bend shall be approximately .031 inch (0.79 mm).
4.5.17.2 Bend test (flat terminals only). Capacitors with flat terminals shall be tested in accordance with method
211 of MIL-STD-202. The following details shall apply:
a. Test condition: B
b. Number of bends: 2.
4.5.18 Resistance to soldering heat (printed circuit mount types only, see 3.1) (see 3.21). Capacitors shall be
tested in accordance with method 210 of MIL-STD-202. The following details and exceptions shall apply:
a. Depth of immersion in molten solder: Leads shall be immersed to within .125 inch (3.18 mm) of the body of
the capacitor.
b. Test condition: B.
c. Cooling time prior to measurement after test: Sufficient time to allow the capacitor temperature to return to
+25°C ±5°C.
d. Measurements after test: Capacitance, dielectric withstanding voltage, and quality factor shall be
Capacitors shall then be examined for evidence of mechanical damage.
4.5.19 Seal (see 3.22). Capacitors shall be placed in a sealed enclosure filled with water with sufficient
noncorrosive dye, Rhodamine B (tetraethylrhodamine). Air pressure shall be applied inside the sealed enclosure to a
pressure level of 40 pounds per square inch gauge for a total period of 15 minutes. After completion of this period of
time, the capacitors shall be removed from the sealed enclosure, cleaned, dried, thoroughly, and then examined for
presence of dye. Maximum rated capacitance, insulation resistance, and dielectric withstanding voltage shall then be
measured as specified in 4.5.3, 4.5.5, and 4.5.6, respectively. (If necessary to determine the presence of dye
internally, the units may be disassembled after performing the rotational life test) (see 4.5.20).
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