AIA/NAS 4123-2012 pdf download HEAT SINK, ELECTRICAL-ELECTRONIC COMPONENT, SEMICONDUCTOR DEVICES, FOR DUAL INLINE PACKAGES (DIP)
MATERIAL: EXTRUDED ALUMINUM ALLOY 2024 (UNS A92024), 6061 (UNS A96061 ) OR 6063 (UNS A96063) PER AMS-QQ-A-200, OR ALUMINUM SHEET OR PLATE 1 1 00 (UNS A91 1 00), 2024 (UNS A92024), 3003 (UNS A93003), 5052 (UNS A95052) OR 6061 (UNS A96061 ) PER AMS-QQ-A-250.
FINISH: BLACK ANODIZE COATING CONFORMING TO MIL-A-8625, TYPE I OR TYPE II, CLASS 2. HARD ANODIZE COATING CONFORMING TO MIL-A-8625, TYPE III, CLASS 2. THIS FINISH SHALL HAVE A MINIMUM THICKNESS OF .001 HARD ANODIZE COATING AND SHALL BE SODIUM DICHROMATE SEALED. THROUGH-HOLES, SHARP EDGES, AND THREADS MAY BE FURNISHED FREE OF ANODIZE, BUT IN SUCH CASES THESE SURFACES SHALL RECEIVE A CHEMICAL CONVERSION COATING IN ACCORDANCE WITH MIL-DTL-5541 , CLASS 1 A.
GOLD ANODIZE COATING CONFORMING TO MIL-A-8625, TYPE I OR TYPE II, CLASS 2.
PRE-ANODIZE COATING CONFORMING TO MIL-A-8625, TYPE II, CLASS 2 (PRE-ANODIZED COIL STOCK).
GOLD CHROMATE COATING CONFORMING TO MIL-DTL-5541 , CLASS 1 A. THIS FINISH IS INTENDED FOR USE ON HEAT SINKS SPECIFICALLY DESIGNATED TO BE ELECTRICALLY CONDUCTIVE. GOLD CHROMATE FINISH SHOULD NOT BE USED IN CORROSIVE OR SALT SPRAY ENVIRONMENTS WHERE OPERATING TEMPERATURES WILL EXCEED +60 ˚C (+1 40 ˚F) AND SALT SPRAY OR CORROSION RESISTANCE IS A NECESSITY.
CODE:
“A” AFTER DASH NUMBER DESIGNATES BLACK ANODIZE COATING.
“H” AFTER DASH NUMBER DESIGNATES HARD ANODIZE COATING.
“L” AFTER DASH NUMBER DESIGNATES GOLD ANODIZE COATING.
“P” AFTER DASH NUMBER DESIGNATES PRE-ANODIZE COATING.
“R” AFTER DASH NUMBER DESIGNATES GOLD CHROMATE COATING.
EXAMPLE OF PART NUMBER:
NAS41 23-01 A = ALUMINUM HEAT SINK, SHAPE PER FIGURE 1 , CONFIGURATION A,.250 INCH HEIGHT, BLACK ANODIZE FINISH.
NAS41 23-21 P = ALUMINUM HEAT SINK, SHAPE AND DIMENSIONS PER FIGURE 1 , CONFIGURATION F,PRE-ANODIZE COATING.
NOTES:
(1 ) DIMENSIONS AND CONFIGURATIONS: SEE FIGURE 1 .
(2) THERMAL CHARACTERISTICS: SEE FIGURE 2.
3) MARKING: HEAT SINKS NEED NOT BE MARKED. PACKAGES SHALL BE MARKED WITH THE NAS PART NUMBER, QUANTITY, AND MANUFACTURER’S NAME OR CAGE CODE, AS A MINIMUM.
(4) SUPPERSESSION DATA: SEE TABLE I.
(5) DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
(6) TOLERANCES UNLESS OTHERWISE SPECIFIED: DECIMALS ± .01 7.

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