MIL-STD-1285-SUP-2 Marking of Electrical and Electronic PartsThis standard establishes requirements for the physical marking of electrical and electronic parts. This standard should be implemented by incorporating suitable requirements directly in acquisition documents.

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MIL-STD-1285D

APPENDIX K

K.3 GENERAL REQUIREMENTS

K.3.1 Department of Defense specification devices.

K.3.1.1 Devices covered by MIL -PRF-19500. Marking of semiconductor devices covered by MIL-PRF-19500 and its associated specifications shall conform to method I and the following:

a. Polarity marking (diodes and thyristors only).

b. Type designation, including "JAN" or "JANTX" prefix as applicable (see K.3.1.6). c. Inspection lot identification code (see K.3.1.7).

d. Manufacturer's designating symbol (see K.3.1.8). e. Manufacturer's identification (see K.3.1.9).

f. Country of origin (see K.3.1.10).

K.3.1.2 Unit pack marking. All of the marking specified in all the above, except polarity, shall appear on the carton, box, plastic envelope, and so forth, used as the initial protection or wrapping for delivery. Marking shall be in accordance with MIL-STD-129. Duplicate information need not be repeated.

K.3.1.3 Special marking. If any special marking is used, it shall in no way interfere with or obscure the marking required in all the above and shall be completely separated therefrom.

K.3.1.4 Permanence of marking. Permanence of marking shall be in accordance with MIL-STD-750, method

1022.

K.3.1.5 Diodes and unidirectional thyristors polarity marking. The polarity shall be indicated by one of the following methods.

K.3.1.5.1 Diodes. Polarity marking shall be by either an arrow or diode graphic symbol with the arrow pointing towards the negative terminal for forward bias or by a single contrasting color band or dot adjacent to the cathode- terminal for forward bias.

K.3.1.5.2 Thyristors. A graphic symbol for a thyristor with the arrow pointing towards the cathode terminal. K.3.1.6 "JAN", "JANTX", "JANTXV", or "JANS" prefix. The type designation shall bear the prefix "JAN", "JANTX",

"JANTXV", or "JANS", as applicable, except that for small devices, the prefix "J", "JX", "JV", or "JS", may be used.