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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13

MIL-PRF-28861D

3.8 Dielectric withstanding voltage. When filters are tested as specified in 4.6.3, there shall be no breakdown,

flashover, or impairment of any characteristics sufficient to cause failure of the filter.

3.9 Capacitance to ground and dissipation factor. When filters are tested as specified in 4.6.4, the capacitance to

ground and dissipation factor shall be as specified (see 3.1).

3.10 Insertion loss. When filters are tested as specified in 4.6.5, the insertion loss shall be as specified (see 3.1).

3.11 Voltage drop. When filters are tested as specified in 4.6.6, the voltage drop shall be as specified (see 3.1).

3.12 DC resistance. When filters are tested as specified in 4.6.7, the dc resistance shall be as specified (see 3.1).

3.13 Radiographic inspection. When filters are tested as specified in 4.6.8, radiographic examination shall not

disclose evidence of any defects listed in 4.6.8.

3.14 Seal (hermetically sealed filters only). When filters are tested as specified in 4.6.9, for the fine leak test, the

leakage rate shall not exceed the maximum leakage rate as specified (see 3.1). When filters are tested as specified

in 4.6.9, for the gross leak test, there shall be no continuous stream of bubbles emanating from the filter, nor shall

there be any evidence of leakage of compound from the body of the filter.

3.15 Voltage and temperature limits of capacitance. When filters are tested as specified in 4.6.10, the change in

capacitance shall not exceed the value specified (see 3.1).

3.16 Temperature rise. When filters are tested as specified in 4.6.11, the maximum temperature rise shall be as

specified (see 3.1).

3.17 Barometric pressure (reduced). When filters are tested as specified in 4.6.12, there shall be no breakdown,

flashover, or impairments of any characteristics sufficient to cause failure of the filter.

3.18 Insulation resistance. When filters are tested as specified in 4.6.13, the insulation resistance shall not be

less than specified (see 3.1).

3.19 Current overload. When filters are tested as specified in 4.6.14, there shall be no evidence of physical

damage. After the test, filters shall meet the following requirements:

Insulation resistance (+25�C): Shall meet initial requirements (see 3.1).

Voltage drop: Shall meet initial requirements (see 3.1).

3.20 Resistance to solvents. When filters are tested as specified in 4.6.15, there shall be no evidence of physical

damage and the marking shall remain legible.

3.21 Vibration (high frequency). When filters are tested as specified in 4.6.16, there shall be no intermittent, open

or short-circuiting, and no physical damage to the filter. After the test, in Group B inspection, Class B filters shall

meet the following requirement:

Insertion loss (+25�C): Shall meet initial requirements (see 3.1).

3.22 Random vibration. When filters are tested as specified in 4.6.17, there shall be no intermittent open or short-

circuiting, and there shall be no evidence of physical damage to the filter. After the test, filters shall meet the

following requirement:

Insertion loss (+25�C): Shall meet initial requirements (see 3.1).