# BZX84C15W

**Changjing** · Zener Diodes · SOT-323

BZX84C15W from Changjing, in a SOT-323. 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 (pin 1 in the symbol on page 1); forward voltage is 0.9 V at IF = 10 mA. |
| 2 | NC | unconnected | No connection; pin 2 is shown as an open, unconnected terminal in the page 1 symbol. |
| 3 | K | passive | Cathode of the zener diode (pin 3 in the symbol on page 1); nominal zener voltage is 15 V (13.8 V to 15.6 V) at IZT = 5 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| 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 | 13.8 | 15 | 15.6 | V | IZT = 5mA, Ta=25℃, pulsed 300µs, 2% duty | 2 |
| Test Current | IZT |  | 5 |  | mA | Ta=25℃ | 2 |
| Maximum Zener Impedance | ZZT |  |  | 30 | Ω | @IZT, f = 1kHz | 2 |
| Maximum Zener Impedance (knee) | ZZK |  |  | 170 | Ω | @IZK, f = 1kHz | 2 |
| Knee Test Current | IZK |  | 1 |  | mA | Ta=25℃ | 2 |
| Maximum Reverse Current | IR |  |  | 0.1 | µA | @VR = 10.5 V | 2 |
| Reverse Voltage for IR | VR |  | 10.5 |  | V | IR test | 2 |
| Temperature Coefficient of Zener Voltage | θVZ | 9.2 |  | 13 | mV/C | IZT = 5mA | 2 |
| Forward Voltage | VF |  |  | 0.9 | V | IF = 10mA | 1 |
| Power Dissipation | PD |  |  | 200 | mW | Ta=25℃ | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 625 | /W |  | 1 |
| Operating Junction and Storage Temperature Range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BZX84C15W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bzx84c15w-etched.step` / `bzx84c15w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c15w.step` / `bzx84c15w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/bzx84c15w-datasheet.pdf) (5 pp, sha256 `d31ca5559522bb6e`, 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/bzx84c15w-datasheet.pdf)