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BZX84C3V9A
Public Made by Adomby adom
Shandong Jingdao Microelectronics Zener Diodes, SOT-23. 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
markdownBZX84C3V9A
Shandong Jingdao Microelectronics · Zener Diodes · SOT-23
BZX84C3V9A from Shandong Jingdao Microelectronics, in a SOT-23. 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 | A | passive | Anode of the single zener diode (Suffix A), zener voltage 3.82V min to 3.98V max at IZT for the 3.9V grade. |
| 2 | NC | unconnected | No internal connection in the Suffix A single-diode configuration; the package drawing shows no diode connected to pin 2. |
| 3 | K | passive | Cathode of the single zener diode (Suffix A), which sits at the positive voltage in zener reverse operation; maximum power dissipation is 350mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Zener voltage VZT (C3V9A, C-series ±5%) | VZT | 3.7 | 3.9 | 4.1 | V | IZT = 5 mA; VZT tested with pulses (20 ms) | 3 |
| Tolerance (C series) | -5 | 5 | % | C suffix in BZX84C3V9A = ±5% | 3 | ||
| Dynamic impedance ZZT max | ZZT | 130 | Ω | at IZT = 5 mA | 3 | ||
| Reverse current IR max | IR | 5 | μA | at VR = 1 V | 3 | ||
| Power dissipation (total) | Ptot | 350 | mW | 1 | |||
| Operating and storage temperature range | Tj, Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
BZX84C3V9A - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bzx84c3v9a-etched.step/bzx84c3v9a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx84c3v9a.step/bzx84c3v9a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shandong Jingdao Microelectronics datasheet (4 pp, sha256
abb7c0e41de9a21a, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+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).