component
1SMA4729A
Public Made by Adomby adom
hongjiacheng Zener Diodes, DO-214AC(SMA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 2d ago |
| viewers | 2d ago |
| 1sma4729a-etched.glb | 2d ago |
| 1sma4729a-etched.step | 2d ago |
| 1sma4729a-hero.glb | 2d ago |
| 1sma4729a-hero.overlay.json | 2d ago |
| 1sma4729a.glb | 2d ago |
| 1sma4729a.kicad_mod | 2d ago |
| 1sma4729a.kicad_sym | 2d ago |
| 1sma4729a.lbr | 2d ago |
| 1sma4729a.step | 2d ago |
| package.json | 2d ago |
| page.json | 2d ago |
| README.md | 2d ago |
1SMA4729A
hongjiacheng · Zener Diodes · DO-214AC(SMA)
1SMA4729A from hongjiacheng, in a DO-214AC(SMA). 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 | passive | One of the two terminals of the SMA zener diode shown in the function diagram; for the 1SMA4729A the nominal zener voltage is 3.6 V (3.40 V min to 3.80 V max) at IZT 69 mA, with ZZT 10 Ω and IR 100 µA at VR 1 V. |
| 2 | A | passive | The second terminal of the SMA zener diode shown in the function diagram; the package's cathode end is marked by a cathode line, and the maximum admissible zener current IZM for the 1SMA4729A is 263 mA with 1000 mW power dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | DO-214AC(SMA) |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse zener voltage | VZ | 3.4 | 3.6 | 3.8 | V | @ IZT = 69 mA | 2 |
| Maximum Zener impedance | ZZT | 10 | Ω | @ IZT = 69 mA | 2 | ||
| Power dissipation | PD | 1000 | mW | Tc=75℃ | 1 | ||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Junction temperature | Tj | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance, junction to ambient | RθJ-A | 250 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
1SMA4729A - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
1sma4729a-etched.step/1sma4729a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1sma4729a.step/1sma4729a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (4 pp, sha256
a029b6256b4d07a8, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).