component
BZX84C3V9Q-13-F
Public Made by Adomby adom
Diodes Incorporated 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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Contents
README
markdownBZX84C3V9Q-13-F
Diodes Incorporated · Zener Diodes · SOT-23
BZX84C3V9Q-13-F from Diodes Incorporated, 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 zener diode, drawn as the lower-left terminal in the device schematic. |
| 2 | NC | unconnected | Lower-right terminal, shown in the device schematic with no internal connection. |
| 3 | K | passive | Cathode of the zener diode, the single top terminal in the device schematic (VZ 3.7V to 4.1V at IZT = 5mA for the C3V9 type). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 (BZX84C3V9) | VZ | 3.7 | 3.9 | 4.1 | V | @ IZT = 5.0 mA; short duration pulse test (Note 8) | 2 |
| Maximum Zener impedance | ZZT | 90 | Ω | @ IZT = 5.0 mA, f = 1 kHz | 2 | ||
| Maximum Zener impedance (knee) | ZZK | 600 | Ω | @ IZK = 1.0 mA, f = 1 kHz | 2 | ||
| Maximum reverse current | IR | 3 | µA | @ VR = 1.0 V | 2 | ||
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 2 | ||
| Power dissipation | PD | 300 | mW | Note 6: FR-4 PC board with recommended pad layout | 2 | ||
| Power dissipation | PD | 350 | mW | Note 7: terminals kept at ambient temperature | 2 | ||
| Thermal resistance, junction to ambient air | RθJA | 417 | °C/W | Note 6: FR-4 PC board with recommended pad layout | 2 | ||
| Thermal resistance, junction to ambient air | RθJA | 357 | °C/W | Note 7: terminals kept at ambient temperature | 2 | ||
| Operating and storage temperature range | TJ, TSTG | -65 | 150 | °C | 2 | ||
| Temperature coefficient (BZX84C3V9) | -3.5 | mV/C | @ IZT = 5.0 mA | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Terminals: Matte Tin Finish Annealed over Alloy 42 Leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208 | 1 |
CAD (KiCad official)
- Symbol:
BZX84C3V9Q-13-F - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bzx84c3v9q-13-f-etched.step/bzx84c3v9q-13-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx84c3v9q-13-f.step/bzx84c3v9q-13-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (5 pp, sha256
70c346b571aa2f8b, retrieved 2026-10-21, 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).