component
SMAJ78A
Public Made by Adomby adom
DOWO TVS, SMA(DO-214AC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSMAJ78A
DOWO · TVS · SMA(DO-214AC)
SMAJ78A from DOWO, in a SMA(DO-214AC). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K (cathode) | passive | The color band marks the cathode end on this unidirectional SMAJ78A, rated for a working peak reverse voltage VRWM of 78.0 V with a maximum reverse leakage IR of 1 uA at VRWM. |
| 2 | A (anode) | passive | The end opposite the color band is the anode; the device is rated for 400 W peak pulse power (10/1000 us waveform) and clamps to a maximum of 126.0 V at a peak pulse current IPP of 3.17 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SMA(DO-214AC) |
| Category | Circuit Protection |
| Pins | 2 |
CAD (KiCad official)
- Symbol:
SMAJ78A - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
smaj78a-etched.step/smaj78a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj78a.step/smaj78a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (4 pp, sha256
4198cd8e3dc5e7ef, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).