# BZT52C22SQ

**JSMSEMI** · Zener Diodes · SOD-323

BZT52C22SQ from JSMSEMI, in a SOD-323. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOD-323 |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Voltage tolerance (C-series) |  | -5 |  | 5 | % | C-series, ±5% | 1 |
| Zener voltage | VZ | 20.9 | 22 | 23.1 | V | @ IZT 5 mA | 2 |
| Maximum zener impedance | ZZT |  |  | 55 | Ω | @ IZT 5 mA | 2 |
| Maximum zener impedance | ZZK |  |  | 250 | Ω | @ IZK 1.0 mA | 2 |
| Temperature coefficient | TC | 16.4 |  | 20 | mV/°C | @ IZT 5 mA | 2 |
| Maximum reverse current | IR |  |  | 0.1 | µA | @ VR 15.4 V | 2 |
| Forward voltage | VF |  |  | 0.9 | V | @ IF=10mA | 1 |
| Power dissipation (collector) | PC |  |  | 200 | mW | @ TA = 25°C | 1 |
| Junction temperature range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 1 |
| Thermal resistance, junction-to-ambient | RθJA |  | 625 |  | °C/W |  | 1 |
| Thermal resistance, junction-to-case | RθJC |  | 337 |  | °C/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BZT52C22SQ`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bzt52c22sq-etched.step` / `bzt52c22sq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52c22sq.step` / `bzt52c22sq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](docs/bzt52c22sq-datasheet.pdf) (4 pp, sha256 `c1206722800d69d9`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/bzt52c22sq-datasheet.pdf)