component
BZX84C39
Public Made by Adomby adom
FOSAN 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
markdownBZX84C39
FOSAN · Zener Diodes · SOT-23
BZX84C39 from FOSAN, 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, shown on the internal configuration diagram as connected through the diode to pin 3 (VZ 37.0-41.0 V at IZ=2 mA, nominal 39 V). |
| 2 | NC | unconnected | Not connected internally; the internal configuration diagram shows pin 2 as an open terminal with no connection to the diode. |
| 3 | K | passive | Cathode of the Zener diode, shown on the internal configuration diagram as connected through the diode to pin 1 (PD 300 mW max at Ta=25℃, IF 250 mA max). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FOSAN |
| 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 (nominal VZ) | VZ | 37 | 39 | 41 | V | Iz = 2 mA | 2 |
| Reverse leakage current | IR | 0.05 | μA | VR = 27.3 V | 2 | ||
| Zener impedance (ZZT) | ZZT | 130 | ohm | Iz = 2 mA | 2 | ||
| Zener impedance (ZZK) | ZZK | 350 | ohm | Iz = 0.5 mA | 2 | ||
| Power dissipation | PD | 300 | mW | Ta = 25℃ | 1 | ||
| Forward current | IF | 250 | mA | 1 | |||
| Forward voltage | VF | 0.9 | V | IF = 10 mA | 1 | ||
| Junction temperature | TJ | 125 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 125 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
BZX84C39 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bzx84c39-etched.step/bzx84c39-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx84c39.step/bzx84c39.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FOSAN datasheet (4 pp, sha256
120764175fb24186, retrieved 2026-10-17, 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).