# BZX84C4V7W

**Yangzhou Yangjie Elec Tech** · Zener Diodes · SOT-323(SC-70)

BZX84C4V7W 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, shown connected to the diode's anode side in the SOT-323 internal schematic. |
| 2 | NC | unconnected | Not connected internally; no connection to the diode is drawn in the SOT-323 schematic. |
| 3 | K | passive | Cathode of the zener diode, shown on the bar side of the diode symbol (BZX84C4V7W: VZ 4.4 to 5.0V, 4.7V typ at IZT=5mA). |

## 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 | 4.4 | 4.7 | 5 | V | IZT=5mA | 2 |
| Maximum Zener Impedance | ZZT |  |  | 80 | Ω | IZT=5mA | 2 |
| Maximum Zener Impedance (knee) | ZZk |  |  | 500 | Ω | IZk=1mA | 2 |
| Max Reverse Leakage Current | IR |  |  | 3 | uA | VR=2V | 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: `BZX84C4V7W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323(SC-70) (KiCad packages3D, STEP)
- 3D model files: `bzx84c4v7w-etched.step` / `bzx84c4v7w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c4v7w.step` / `bzx84c4v7w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](docs/bzx84c4v7w-datasheet.pdf) (5 pp, sha256 `c3fc10e158963aff`, retrieved 2026-10-22, 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/bzx84c4v7w-datasheet.pdf)