# AZ23C39

**Yangzhou Yangjie Elec Tech** · Zener Diodes · SOT-23(TO-236)

AZ23C39 from Yangzhou Yangjie Elec Tech, in a SOT-23(TO-236). 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 | K1 | passive | Cathode of zener diode 1, which has a nominal zener voltage of 39 V (37 V min, 41 V max at IZT = 2 mA) for AZ23C39. |
| 2 | K2 | passive | Cathode of zener diode 2, which has a nominal zener voltage of 39 V (37 V min, 41 V max at IZT = 2 mA) for AZ23C39, and the two diodes match within 5% in VZ. |
| 3 | A | passive | Common anode of both zener diodes, which is the single lead on the top side of the SOT-23 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-23(TO-236) |
| 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 | 37 | 39 | 41 | V | @ IZT = 2 mA | 2 |
| Maximum Zener Impedance | ZZT |  |  | 130 | Ω | @ IZT = 2 mA | 2 |
| Maximum Zener Impedance (knee) | ZZk |  |  | 350 | Ω | @ IZk = 1 mA | 2 |
| Reverse Leakage Current | IR |  |  | 0.1 | uA | @ VR = 27.3 V | 2 |
| Power Dissipation | PD |  |  | 300 | mW | Ta=25℃ | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 417 | ℃/W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `AZ23C39`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23(TO-236) (KiCad packages3D, STEP)
- 3D model files: `az23c39-etched.step` / `az23c39-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `az23c39.step` / `az23c39.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](docs/az23c39-datasheet.pdf) (5 pp, sha256 `d6a96b89b3960da4`, 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/az23c39-datasheet.pdf)