1. SCOPE:

1.1 Scope:

This specification covers class L, low dielectric constant (12 or under), ceramic, electrical, insulating compounds, for use in electronic, communications, and allied electrical equipments, and the grading thereof (see 6.1).

1.2 Classification:

This specification shall cover only those insulating compounds characterized by combining the specific designators of 1.2.1 to 1.2.5., inclusive.

1.2.1 Insulating compound designator: Insulating compounds shall be identified by the single letter designator "L".

1.2.2 Grade designators: Insulating compounds shall be further identified by three numbers (grade designators) following the above designator, the first representing dielectric loss index at one megahertz (MHz), the second dielectric strength, and the third flexural strength (modulus of rupture), as specified, i.e., L422-- (see 6.1 and 6.2).

1.2.2.1 Dielectric loss index at 1 MHz: The designator for dielectric loss index is determined by the maximum dielectric loss index at 1 MHz of the specimens tested, as follows:

1.2.2.2 Dielectric strength: The designator for dielectric strength is determined by the average dielectric strength of the specimens tested, as follows:

1.2.2.3 Flexural strength (modulus of rupture): The designator for flexural strength (modulus of rupture) is determined by the average flexural strength (modulus of rupture) of the specimens tested, as follows:

1.2.3 X-band designators: When insulating compounds are required for frequency applications from 100 MHz to 24 gigahertz (GHz), they shall be identified by the designator "X", followed by a one-digit number, a slant line, and a two-digit number. The one-digit number shall represent dielectric loss index measured at some X-band frequency in the range from 8.2 GHz to 12.4 GHz, using the table of grade designators of 1.2.2.1, and the two-digit number shall represent dielectric constant measured at some X-band frequency (see 1.2.3.1), as specified (see 6.1 and 6.2).

1.2.3.1 Dielectric constant at X band: The designator for dielectric constant is determined by the dielectric constant at some X band frequency in the range from 8.2 to 12.4 GHz of the specimens tested as follows:

1.2.4 Thermal conductivity designator: When high thermal conductivity (see 3.7) insulating compounds are required, they shall be identified by the designator "T", i.e., L422T-- or L422 X6/04T--. (See 6.1 and 6.2).

1.2.5 Finish designator: Insulating compounds shall be further identified by a single letter designator, "G" or "C," to represent finish, i.e., L323G, L323 X/04G, L323TG or L323 X6/04TG. (See 6.1 and 6.2).

Customers who purchased SAE AMS-I-10
also purchased

• ECA J-STD-002C AMD 1 : Solderability Tests for Component Leads, Terminations, Lugs, Terminals and Wires Amendment 1
• IPC J-STD-004A JAPANESE : REQUIREMENTS FOR SOLDERING FLUXES
• DLA AN565 REV 7 CANC NOTICE 4 : SETSCREW - HEXAGON AND FLUTED SOCKET, HEADLESS
• SAI AS 2686.1 : Dental Equipment - Suction Systems Part 1: Central Systems (R 1994)

See More Documents