# BZX84C75

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

BZX84C75 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; the SOT-23 diagram on page 1 connects pin 1 to the diode's triangle side, with forward voltage max 0.9 V at IF=10mA. |
| 2 | NC | unconnected | Pin 2 is shown on the SOT-23 diagram with no internal connection to the diode. |
| 3 | K | passive | Cathode of the zener diode; pin 3 connects to the bar side, with nominal Zener voltage 75V (70V min to 79V max) at IZT=2mA and power dissipation 350 mW. |

## 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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener Voltage (min) | VZ | 70 |  |  | V | at IZT = 2 mA | 2 |
| Nominal Zener Voltage (typ) | VZ |  | 75 |  | V | at IZT = 2 mA | 2 |
| Nominal Zener Voltage (max) | VZ |  |  | 79 | V | at IZT = 2 mA | 2 |
| Maximum Zener Impedance | ZZT |  |  | 255 | Ω | at IZT = 2 mA | 2 |
| Maximum Zener Impedance (knee) | ZZk |  |  | 500 | Ω | at IZk = 0.5 mA | 2 |
| Max Reverse Leakage Current | IR |  |  | 0.05 | uA | at VR = 52.5 V | 2 |
| Maximum Forward Voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 1 |
| Power Dissipation | PD |  |  | 350 | mW |  | 1 |
| Peak Forward Surge Current | IFSM |  |  | 2 | A | Measured on 8.3 ms, single half sine-wave | 1 |
| Operation Temperature | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance (junction to ambient) | RthJA |  |  | 357 | ℃/W |  | 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: `BZX84C75`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bzx84c75-etched.step` / `bzx84c75-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c75.step` / `bzx84c75.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/8590224379398422528) (5 pp, sha256 `41a0bd4a2cfbccd9`, retrieved 2026-10-18, 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/bzx84c75-datasheet.pdf)