# BZX84C4V7Q

**Yangzhou Yangjie Elec Tech** · Zener Diodes · SOT-23

BZX84C4V7Q from Yangzhou Yangjie Elec Tech, 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 (per the page 1 internal diagram); 4.7V nominal Zener voltage (4.4V min to 5.0V max at IZT=5mA) for the BZX84C4V7Q. |
| 2 | NC | unconnected | Pin 2 has no internal connection in the page 1 diagram (not wired to the diode). |
| 3 | K | passive | Cathode of the Zener diode (per the page 1 internal diagram); maximum power dissipation 350mW and maximum forward voltage 0.9V at IF=10mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| 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 (min) | VZ | 4.4 |  |  | V | Izt 5 mA | 2 |
| Zener voltage (typ) | VZ |  | 4.7 |  | V | Izt 5 mA | 2 |
| Zener voltage (max) | VZ |  |  | 5 | V | Izt 5 mA | 2 |
| Zener voltage tolerance |  | -5 |  | 5 | % | approximately; printed as VZ-tolerance ±5% approximately | 1 |
| Dynamic impedance at Izt | Zzt |  |  | 80 | Ω | IZt 5 mA | 2 |
| Dynamic impedance at Izk | Zzk |  |  | 500 | Ω | Izk 1.0 mA | 2 |
| Reverse leakage current | IR |  |  | 3 | μA | VR 2.0 V | 2 |
| Typical temperature coefficient (min) | TC | -3.5 |  |  | mV/℃ | IZTC 5 mA | 2 |
| Typical temperature coefficient (max) | TC |  |  | 0.2 | mV/℃ | IZTC 5 mA | 2 |
| Maximum forward voltage | VF |  |  | 0.9 | V | IF=10mAdc | 1 |
| Power dissipation | PD |  |  | 350 | mW | Ta=25℃ | 1 |
| Storage temperature range | Tstg | -55 |  | 150 | °C |  | 1 |
| Junction temperature | TJ | -55 |  | 150 | °C |  | 1 |
| Thermal resistance junction to ambient air | RθJA |  |  | 357 | °C/W | Junction to Ambient Air* (footnote not printed in extract) | 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 |
|---|---|---|---|---|
| housing |  | black | 4. Body color: Black | 5 |
| contacts |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `BZX84C4V7Q`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bzx84c4v7q-etched.step` / `bzx84c4v7q-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c4v7q.step` / `bzx84c4v7q.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603034818158743552) (6 pp, sha256 `f8c4b42d0d50ce1f`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/bzx84c4v7q-datasheet.pdf)