scope:

This specification covers the general requirements for low-pass filters and capacitors used to suppress radio frequency/electromagnetic interference. Filters furnished to the requirements of this specification shall contain shunting capacitors and series inductors (FSC 5915). Capacitors furnished to the requirements of this specification shall contain shunting capacitors (FSC 5910). For the purposes of this specification, feed-thru capacitor types (C circuit configuration) shall be referred to herein as a filter. Passband power may be alternating current (ac) and/or direct current (dc) and the filter shall be used primarily in the reduction of broadband radio frequency interference.

The type designation shall be in the following form, and as specified (see 3.1):

The style is identified by the two-letter symbol "FL" followed by a two digit number. The letters identify radio frequency interference filters; the digits identify the general shape and mounting of the case.

The current rating, at maximum operating temperature, is identified by a single letter in accordance with table I. TABLE I. Current rating.

Symbol Rated Symbol Rated current current ----------------------------------------------------- Amperes Amperes A 0.1 H 15.0 B 0.3 J 20.0 C 0.5 L 30.0 D 1.0 N 55.0 X 1.5 P 70.0 Y 2.0 R 100.0 E 3.0 S 150.0 F 5.0 T 200.0 Z 7.0 U 300.0 G 10.0 V 500.0 W As specified (see 3.1)

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Electronic Systems Command, ATTN: ELEX 8111, Department of the Navy, Washington, D.C. 20363, by using the selfaddressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The insertion-loss characteristic is identified by a single letter in accordance with table II.

Terminals are identified by a number and a letter in accordance with table III. The number identifies the type of material and the letter identifies the thread (or other dimensions). TABLE III. Terminal types and dimensions.

Symbol Type of terminal Thread or dimension ----------------------------------------------------------- 1E Solder lug --- 2G Radially tapped permanent .164-32 UNC-2B stud 2H Radially tapped permanent .190-32 UNF-2B stud 3F Threaded stud .112-40 UNC-2A 3L Threaded stud .138-32 UNC-2A 3J Threaded stud .164-32 UNC-2A 3K Threaded stud .190-32 UNF-2A 3M Threaded stud .250-28 UNF-2A 3 UN Threaded stud .3125-24 UNF-2A 3P Threaded stud .216-28 UNF-2A

The operating temperature range is identified by a single letter in accordance with table IV. TABLE IV. Operating temperature range.

Symbol Temperature range ---------------------------------------- °C A −65 to +85, incl B −65 to +125, incl C −65 to +200, incl D −55 to +125, incl E −55 to +85, incl W (As specified, see 3.1)

The grade is identified by a single digit in accordance with table V. TABLE V. Grade.

Symbol Vibration condition --------------------------------- Hz 1 10 to 55, incl 2 10 to 500, incl 3 10 to 2,000 incl

intended Use: