# AZ23C18-7-F

**Diodes Incorporated** · Zener Diodes · SOT-23

AZ23C18-7-F from Diodes Incorporated, 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 | K1 | passive | Cathode of Zener diode 1, which has a 16.8 to 19.1V Zener voltage range at IZT = 5.0mA for the AZ23C18. |
| 2 | K2 | passive | Cathode of Zener diode 2, which has a 16.8 to 19.1V Zener voltage range at IZT = 5.0mA for the AZ23C18. |
| 3 | A | passive | Common anode of both Zener diodes. The two diodes are in a common anode configuration, with VZ matched within 5% in one case. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 (VZ) at IZT = 5.0 mA, AZ23C18 (16.8 to 19.1 V) | VZ | 16.8 |  | 19.1 | V | @ IZT = 5.0 mA | 3 |
| Maximum zener impedance ZZT, AZ23C18 | ZZT |  |  | 50 | Ω | @ IZT = 5.0 mA, f = 1kHz | 3 |
| Maximum zener impedance ZZK, AZ23C18 | ZZK |  |  | 170 | Ω | @ IZK = 1.0 mA, f = 1kHz | 3 |
| Minimum reverse voltage VR, AZ23C18 | VR | 14 |  |  | V | @ IR = 0.1 µA | 3 |
| Typical temperature coefficient TC, AZ23C18 | TC |  | 0.09 |  | %/°C | Typical value as printed (+0.090) | 3 |
| Power dissipation PD | PD |  |  | 300 | mW | Note 5: mounted on FR-4 PCB with recommended pad layout | 3 |
| Thermal resistance, junction to ambient air RθJA | RJA |  | 417 |  | °C/W | Note 5: mounted on FR-4 PCB with recommended pad layout | 3 |
| Operating and storage temperature range | TJ, TSTG | -65 |  | 150 | °C |  | 3 |
| VZ matching for both diodes in one case | VZ | -5 |  | 5 | % | Both diodes in one case (common anode dual); printed as '5%' in Features, sign not shown in extracted text | 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: Matte Tin Finish Annealed over Alloy 42 Leadframe (Lead Free Plating). Solderable per MIL-STD-202, Method 208 | 1 |

## CAD (KiCad official)

- Symbol: `AZ23C18-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `az23c18-7-f-etched.step` / `az23c18-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `az23c18-7-f.step` / `az23c18-7-f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AZ23C18-7-F.pdf) (7 pp, sha256 `bc1f7e43d5d72ebc`, retrieved 2026-11-05, tier: manufacturer)
- **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/az23c18-7-f-datasheet.pdf)