electromagnetic interference. Filters furnished to the requirements of this specification contain shunting ceramic discoidal capacitors and series inductors \(FSC 5915\). Capacitors furnished to the requirements of this specification contain shunting ceramic discoidal capacitors \(FSC 5910\). For the purposes of this specification, feed-through capacitor types \(C circuit configuration\) are referred to herein as a filter. Passband power may be alternating current \(ac\) or direct current \(dc\) and the filters used primarily in the reduction of broadband radio frequency interference. This specification provides for two levels of product assurance requirements. Filters covered by this specification are capable of operation over the temperature range of -55 degrees C to +125 degrees C.

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MIL-PRF-28861D

d. Test during vibration to determine intermittent open or short-circuiting.

e. Examination after test: Filters shall be inspected for evidence of physical damage.

f. Measurements after test (Group B inspection only): Class B filters shall be subjected to the insertion-loss

test (see 4.6.5).

4.6.17 Random vibration (see 3.22). Filters shall be tested in accordance with method 214 of MIL-STD-202. The

following details and exceptions shall apply:

a. Mounting of specimens: Filters shall be rigidly mounted by the body.

b. Electrical load: DC rated voltage and current shall be applied continuously during vibration.

c. Test condition: (I-C for class B; I-F for class S.) The test shall be conducted for 1� hours in each of three

mutually perpendicular directions.

d. During vibration filters shall be monitored to determine intermittent open and short-circuiting. Detecting

equipment shall be sufficiently sensitive to detect any interruption of 0.5 ms or greater duration.

e. Examination after test: Filters shall be inspected for evidence of physical damage.

f. Measurements after test: Filters shall be subjected to the insertion-loss test (see 4.6.5).

4.6.18 Thermal shock and immersion (hermetically sealed filters only) (see 3.23).

4.6.18.1 Thermal shock. Filters shall be tested in accordance with method 107 of MIL-STD-202. The following

details and exceptions shall apply:

a. Test condition.

(1) Class B: Test condition A, except step 3 temperature shall be +125�C +3�C, -0�C.

(2) Class S: Test condition A-1, except step 3 temperature shall be +125�C +3�C, -0�C.

b. Measurements before and after cycling: Not applicable.

4.6.18.2 Immersion. Following thermal shock, filters shall be tested in accordance with method 104 of

MIL-STD-202. The following details shall apply:

a. Test condition A.

b. Measurements after final cycle: Dielectric withstanding voltage with 90 percent of the voltage specified in

4.6.3 applied for 5 � 1 second, insulation resistance (at +25�C), and insertion loss as specified in 4.6.13

and 4.6.5, respectively.

c. Visual inspection: After the test, filters shall be visually inspected for corrosion and obliteration of marking.

4.6.19 Resistance to soldering heat (see 3.24). Filters shall be tested in accordance with method 210 of MIL-

STD-202, the following details shall apply:

a. Depth of immersion in the molten solder shall be to a point 0.0625 � 0.031 inch (1.59 � 0.79 mm) from the

case.

b. Test condition letter B.