# BAT54WSQ

**Yangzhou Yangjie Elec Tech** · Schottky Diodes · SOD-323(SC-90)

BAT54WSQ from Yangzhou Yangjie Elec Tech, in a SOD-323(SC-90). 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 | Yangzhou Yangjie Elec Tech |
| Package | SOD-323(SC-90) |
| 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 |
|---|---|---|---|---|---|---|---|
| Forward Voltage | VF |  |  | 0.24 | V | IF=0.1mA | 1 |
| Forward Voltage | VF |  |  | 0.32 | V | IF=1mA | 1 |
| Forward Voltage | VF |  |  | 0.4 | V | IF=10mA | 1 |
| Forward Voltage | VF |  |  | 0.5 | V | IF=30mA | 1 |
| Forward Voltage | VF |  |  | 1 | V | IF=100mA | 1 |
| Reverse Current | IR |  |  | 2 | μA | VR=25V | 1 |
| Reverse Breakdown Voltage | VBR | 30 |  |  | V | IR=10μA | 1 |
| Diode Capacitance | CD |  |  | 10 | pF | VR=1 V, f =1MHZ | 1 |
| Reverse Recovery Time | trr |  |  | 5 | ns | IF=IR=10mA,Irr=1mA,RL=100Ω | 1 |
| Repetitive Peak Reverse Voltage | VRRM |  |  | 30 | V |  | 1 |
| Average Forward Current | IFAV |  |  | 200 | mA |  | 1 |
| Peak Forward Surge Current | IFSM |  |  | 0.6 | A | tp＜10ms | 1 |
| Power Dissipation | Ptot |  |  | 200 | mW |  | 1 |
| Maximum Junction Temperature | Tj |  |  | 125 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BAT54WSQ`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323(SC-90) (KiCad packages3D, STEP)
- 3D model files: `bat54wsq-etched.step` / `bat54wsq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54wsq.step` / `bat54wsq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834370425905152) (4 pp, sha256 `eeb521cdb43547b1`, retrieved 2026-10-15, 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/bat54wsq-datasheet.pdf)