# BZX84C47LT1G

**onsemi** · Zener Diodes · SOT-23

BZX84C47LT1G from onsemi, 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 | Anode | passive | Anode terminal of the Zener diode; the datasheet's pinout gives 1-Anode and the marking diagram shows Anode at pin 1. |
| 2 | NC | unconnected | No connection; the datasheet lists pin 2 as 'No Connection' in the Style 8 pinout and the electrical characteristics header. |
| 3 | Cathode | passive | Cathode terminal of the Zener diode, indicated on the package by the polarity band (the marking diagram shows Cathode at pin 3). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage (standard tolerance, IZT1 test) | VZ1 | 44 | 47 | 50 | V | @ IZT1 = 5 mA (Note 3) | 3 |
| Maximum Zener Impedance | ZZT1 |  |  | 170 | Ω | @ IZT1 = 5 mA (Note 3) | 3 |
| Reverse Zener Voltage (IZT2 test) | VZ2 | 43.7 |  | 50 | V | @ IZT2 = 1 mA (Note 3) | 3 |
| Maximum Zener Impedance (IZT2 test) | ZZT2 |  |  | 375 | Ω | @ IZT2 = 1 mA | 3 |
| Reverse Zener Voltage (IZT3 test) | VZ3 | 44.1 |  | 50.5 | V | @ IZT3 = 20 mA (Note 3) | 3 |
| Maximum Zener Impedance (IZT3 test) | ZZT3 |  |  | 90 | Ω | @ IZT3 = 20 mA | 3 |
| Reverse Leakage Current | IR |  |  | 0.05 | µA | @ VR = 32.9 V | 3 |
| Maximum Temperature Coefficient of VZ | VZ | 42 |  | 51.8 | mV/k | @ IZT1 = 5 mA | 3 |
| Max. Capacitance | C |  |  | 40 | pF | @ VR = 0, f = 1 MHz | 3 |
| Forward Voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 3 |
| Total Power Dissipation on FR-5 Board | PD |  |  | 250 | mW | FR-5 board (Note 1), TA = 25°C | 2 |
| Total Power Dissipation on Alumina Substrate | PD |  |  | 300 | mW | Alumina substrate (Note 2), TA = 25°C | 2 |
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RθJA |  |  | 500 | °C/W | FR-5 board (Note 1) | 2 |
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RθJA |  |  | 417 | °C/W | Alumina substrate (Note 2) | 2 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `BZX84C47LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bzx84c47lt1g-etched.step` / `bzx84c47lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c47lt1g.step` / `bzx84c47lt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586188166423961600) (7 pp, sha256 `5a1a409db1310273`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/bzx84c47lt1g-datasheet.pdf)