# SZBZX84C9V1ET1G

**onsemi** · Zener Diodes · SOT-23

SZBZX84C9V1ET1G 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 gives no separate pin-level electrical limits for this pin beyond the device maximum ratings. |
| 2 | NC | unconnected | No internal connection (marked 'No Connection' in the Style 8 package outline and in the Electrical Characteristics pinout note). |
| 3 | CATHODE | passive | Cathode terminal of the Zener diode, indicated by the polarity band on the package; the datasheet gives no separate pin-level electrical limits for this pin beyond the device maximum ratings. |

## 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 min/nom/max) | VZ | 8.5 | 9.1 | 9.6 | V | @ IZT1 = 5 mA (Note 4) | 3 |
| Maximum Zener Impedance (ZZT1) | ZZT |  |  | 15 | Ω | @ IZT1 = 5 mA | 3 |
| Reverse Zener Voltage (VZ2 min/max) | VZ | 8.4 |  | 9.6 | V | @ IZT2 = 1 mA (Note 4) | 3 |
| Maximum Zener Impedance (ZZT2) | ZZT |  |  | 100 | Ω | @ IZT2 = 1 mA | 3 |
| Reverse Zener Voltage (VZ3 min/max) | VZ | 8.5 |  | 9.7 | V | @ IZT3 = 20 mA (Note 4) | 3 |
| Maximum Zener Impedance (ZZT3) | ZZT |  |  | 8 | Ω | @ IZT3 = 20 mA | 3 |
| Reverse Leakage Current | IR |  |  | 0.5 | µA | @ VR = 6.0 V | 3 |
| Maximum Temperature Coefficient of VZ | VZ | 3.8 |  | 7 | mV/k | @ IZT1 = 5 mA | 3 |
| Max Capacitance | C |  |  | 130 | pF | @ VR = 0 and f = 1 MHz | 3 |
| Peak Power Dissipation | Ppk |  |  | 225 | W | @ 20 s (Note 1), TL ≤ 25°C | 1 |
| Total Power Dissipation on FR-5 Board | PD |  |  | 250 | mW | @ TA = 25°C (Note 2), FR-5 board | 1 |
| Thermal Resistance, Junction-to-Ambient (FR-5 Board) | RθJA |  |  | 500 | °C/W | FR-5 board (Note 2) | 1 |
| Total Power Dissipation on Alumina Substrate | PD |  |  | 300 | mW | @ TA = 25°C (Note 3), alumina substrate | 1 |
| Thermal Resistance, Junction-to-Ambient (Alumina Substrate) | RθJA |  |  | 417 | °C/W | alumina substrate (Note 3) | 1 |
| Junction and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SZBZX84C9V1ET1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `szbzx84c9v1et1g-etched.step` / `szbzx84c9v1et1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `szbzx84c9v1et1g.step` / `szbzx84c9v1et1g.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/8589979392677490688) (7 pp, sha256 `745509f6ff110e1a`, retrieved 2026-10-19, 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/szbzx84c9v1et1g-datasheet.pdf)