SMAJ12A
Public Made by Adomby adom
MDD Microdiode Semiconductor ESD And Surge Protection (TVS/ESD), DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Reel orientation: stated in the datasheet, missing on the page
Found by the Puma assembly sim's rotation check (ROT), ADVISORY. Sim-director checkpoint c2, 2026-10-28.
Finding: Reel orientation missing (afs-adom)
Evidence (the datasheet on this page): p. 5 packing: band at the sprocket-hole end; p. 1 "Cathode Band"
Suggested addition to the page: Reel: cathode band toward the sprocket holes (MDD), 12 mm tape, 4 mm pitch
Why it matters: the Puma's carrier Orientation for this part has to match how it sits in the tape. If it does not, a polarised part is placed rotated. The nametag first article on 2026-09-21 placed its USB-C 180 degrees off this way. Angles are in the tape frame: 0 means toward the direction of feed, 90 toward the sprocket holes, viewed from the cover tape. EIA-481 quadrants are as TI draws them, Q1 upper-left with the holes on top and the feed to the right.
Record: puma-sim data/reel-orientation (private drew2/adom-aiflow-assembly, not released yet). Nothing on this page was edited.
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