# BZX84C5V1LT3G

**onsemi** · Zener Diodes · SOT-23

BZX84C5V1LT3G from onsemi, 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 | Anode | passive | Anode terminal of the Zener diode; the datasheet's STYLE 8 pinout assigns pin 1 as ANODE, opposite the cathode marked by the polarity band. |
| 2 | NC | unconnected | No connection (NO CONNECTION per STYLE 8); this pin is not connected internally and is not used in the circuit. |
| 3 | Cathode | passive | Cathode terminal of the Zener diode; the cathode is indicated by the polarity band on the SOT-23 package. |

## 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 | VZ1 | 4.8 | 5.1 | 5.4 | V | @ IZT1 = 5 mA (Note 3) | 3 |
| Maximum Zener Impedance | ZZT1 |  |  | 60 | Ω | @ IZT1 = 5 mA | 3 |
| Reverse Zener Voltage | VZ2 | 4.2 |  | 5.3 | V | @ IZT2 = 1 mA (Note 3) | 3 |
| Maximum Zener Impedance | ZZT2 |  |  | 480 | Ω | @ IZT2 = 1 mA | 3 |
| Reverse Zener Voltage | VZ3 | 5 |  | 5.9 | V | @ IZT3 = 20 mA (Note 3) | 3 |
| Maximum Zener Impedance | ZZT3 |  |  | 15 | Ω | @ IZT3 = 20 mA | 3 |
| Reverse Leakage Current | IR |  |  | 2 | µA | @ VR = 2 V | 3 |
| Maximum Temperature Coefficient of VZ | VZ | -2.7 |  | 1.2 | mV/k | @ IZT1 = 5 mA | 3 |
| Max. Capacitance | C |  |  | 225 | pF | @ VR = 0 and f = 1 MHz | 3 |
| Forward Voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 3 |
| Total Power Dissipation on FR-5 Board | PD |  |  | 250 | mW | Note 1, @ TA = 25°C | 2 |
| Derating above 25°C (FR-5 Board) |  |  |  | 2 | mW/°C | Derated above 25°C, FR-5 Board (Note 1) | 2 |
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RJA |  |  | 500 | °C/W | FR-5 Board (Note 1) | 2 |
| Total Power Dissipation on Alumina Substrate | PD |  |  | 300 | mW | Note 2, @ TA = 25°C | 2 |
| Derating above 25°C (Alumina Substrate) |  |  |  | 2.4 | mW/°C | Derated above 25°C, Alumina Substrate (Note 2) | 2 |
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RJA |  |  | 417 | °C/W | Alumina Substrate (Note 2) | 2 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | °C |  | 2 |

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

- Symbol: `BZX84C5V1LT3G`
- 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, 1.0 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: `bzx84c5v1lt3g-etched.step` / `bzx84c5v1lt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84c5v1lt3g.step` / `bzx84c5v1lt3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/bzx84c5v1lt3-d.pdf) (7 pp, sha256 `5a1a409db1310273`, retrieved 2026-11-13, tier: manufacturer)
- **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:** land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

[Datasheet PDF](docs/bzx84c5v1lt3g-datasheet.pdf)