component
BZX84C3V9W
Public Made by Adomby adom
Yangzhou Yangjie Elec Tech Zener Diodes, SOT-323(SC-70). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownBZX84C3V9W
Yangzhou Yangjie Elec Tech · Zener Diodes · SOT-323(SC-70)
BZX84C3V9W from Yangzhou Yangjie Elec Tech, in a SOT-323(SC-70). 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, which conducts forward at a maximum VF of 0.9 V at IF=10 mA. |
| 2 | NC | unconnected | No internal connection; the pin is shown with no connection to the diode in the package symbol. |
| 3 | K | passive | Cathode of the Zener diode, which regulates at a nominal VZ of 3.9 V (3.7 V to 4.1 V) at IZT=5 mA for BZX84C3V9W. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-323(SC-70) |
| 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 | VZ | 3.7 | 3.9 | 4.1 | V | IZT=5mA | 2 |
| Maximum Zener Impedance | ZZT | 90 | Ω | IZT=5mA | 2 | ||
| Maximum Zener Impedance (knee) | ZZk | 600 | Ω | IZk=1mA | 2 | ||
| Max Reverse Leakage Current | IR | 3 | uA | VR=1V | 2 | ||
| Maximum Forward Voltage | VF | 0.9 | V | IF=10mA | 1 | ||
| Power Dissipation | PD | 200 | mW | Ta=25℃ | 1 | ||
| Peak Forward Surge Current | IFSM | 2 | A | 8.3ms, single half sine-wave | 1 | ||
| Thermal Resistance | RthJA | 625 | ℃/W | 1 | |||
| Operation Temperature | TJ | -55 | 150 | ℃ | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 1 |
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: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
BZX84C3V9W - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323(SC-70) (KiCad packages3D, STEP)
- 3D model files:
bzx84c3v9w-etched.step/bzx84c3v9w-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx84c3v9w.step/bzx84c3v9w.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (5 pp, sha256
c3fc10e158963aff, retrieved 2026-10-22, 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).