# BZX84C27Q-7-F

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

BZX84C27Q-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 and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | A | passive | Zener anode, the bottom-left terminal in the device schematic, which connects to the diode symbol (BZX84C27: VZ 25.1V to 28.9V at IZT = 2.0mA). |
| 2 | NC | unconnected | Bottom-right terminal in the device schematic, which has no internal connection to the diode. |
| 3 | K | passive | Zener cathode, the single top terminal in the device schematic, connected to the cathode bar of the diode. |

## 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 (nominal 27 V; min/max for BZX84C27) | VZ | 25.1 | 27 | 28.9 | V | @ IZT = 2.0 mA | 2 |
| Maximum reverse current | IR |  |  | 0.1 | µA | @ VR = 18.9 V | 2 |
| Maximum Zener impedance | ZZT |  |  | 80 | Ω | @ IZT = 2.0 mA, f = 1 kHz | 2 |
| Maximum Zener impedance at knee | ZZK |  |  | 300 | Ω | @ IZK = 0.5 mA, f = 1 kHz | 2 |
| Temperature coefficient |  | 21.4 |  |  | mV/°C | @ IZT = 2.0 mA | 2 |
| Forward voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 2 |
| Power dissipation (Note 6, FR-4 PCB with recommended pad layout) | PD |  |  | 300 | mW | Note 6 | 2 |
| Power dissipation (Note 7, terminals kept at ambient temperature) | PD |  |  | 350 | mW | Note 7 | 2 |
| Thermal resistance, junction to ambient air (Note 6) | RθJA |  |  | 417 | °C/W | Note 6 | 2 |
| Thermal resistance, junction to ambient air (Note 7) | RθJA |  |  | 357 | °C/W | Note 7 | 2 |
| Operating and storage temperature range | TJ, TSTG | -65 |  | 150 | °C |  | 2 |

## 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 (land: KiCad; 3D: generated from the datasheet)

- Symbol: `BZX84C27Q-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.025 mm tall, datasheet A, nominal). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files: `bzx84c27q-7-f-etched.step` / `bzx84c27q-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c27q-7-f.step` / `bzx84c27q-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/BZX84C27Q-7-F.pdf) (5 pp, sha256 `1ee9e1a294b45898`, retrieved 2026-11-13, 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:** land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

[Datasheet PDF](docs/bzx84c27q-7-f-datasheet.pdf)