# BSS84W

**Yangzhou Yangjie Elec Tech** · MOSFETs · SOT-323

BSS84W from Yangzhou Yangjie Elec Tech, in a SOT-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 | G | input | Gate; gate-source voltage is limited to ±20 V absolute maximum, with threshold VGS(th) of -0.9 V min, -1.4 V typ, -2.0 V max at ID=-250μA. |
| 2 | S | passive | Source; continuous body-diode current IS is -0.17 A max and drain-source voltage rating is -60 V. |
| 3 | D | passive | Drain; continuous drain current is -0.17 A at TA=25℃ (-0.14 A at 70℃), pulsed 0.68 A, with VDS rated -60 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-Source Breakdown Voltage | BVDSS | -60 |  |  | V | VGS= 0V, ID=-250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS=-60V,VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS= ±20V, VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.9 | -1.4 | -2 | V | VDS= VGS, ID=-250μA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 3.3 | 8 | Ω | VGS= -10V, ID=-0.15A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 3.5 | 9.9 | Ω | VGS= -4.5V, ID=-0.15A | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | IS=-0.17A,VGS=0V | 2 |
| Maximum Body-Diode Continuous Current | IS |  |  | -0.17 | A |  | 2 |
| Drain-Source Voltage | VDS |  |  | -60 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Drain Current | ID |  |  | -0.17 | A | TA=25℃ @ Steady State | 1 |
| Drain Current | ID |  |  | -0.14 | A | TA=70℃ @ Steady State | 1 |
| Pulsed Drain Current | IDM |  |  | 0.68 | A |  | 1 |
| Total Power Dissipation | PD |  |  | 0.15 | W | TA=25℃ | 1 |
| Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-to-Ambient | RθJA |  |  | 833 | ℃/ W | Device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch | 1 |

## CAD (KiCad official)

- Symbol: `BSS84W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bss84w-etched.step` / `bss84w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bss84w.step` / `bss84w.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/8588950377274216448) (5 pp, sha256 `dd0a3679dbfd9e5d`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/bss84w-datasheet.pdf)