component
BSS138
Public Made by Adomby adom
Changjing MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BSS138
Changjing · MOSFETs · SOT-23
BSS138 from Changjing, 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 | GATE | input | Gate terminal: continuous gate-source voltage VGSS is limited to ±20 V, and gate threshold VGS(th) is 0.80 V min to 1.50 V max at VDS = VGS, ID = 1 mA. |
| 2 | SOURCE | passive | Source terminal: body diode forward voltage VSD is 1.4 V max at IS = 0.44 A and VGS = 0 V. |
| 3 | DRAIN | passive | Drain terminal: drain-source voltage VDS is rated 50 V, continuous drain current ID is 0.22 A, and RDS(on) is 3.5 Ω max at VGS = 10 V (6 Ω max at VGS = 4.5 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BSS138 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bss138-etched.step/bss138-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bss138.step/bss138.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (5 pp, sha256
0c1c1f76b4802dda, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# BSS138
**Changjing** · MOSFETs · SOT-23
BSS138 from Changjing, 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 | GATE | input | Gate terminal: continuous gate-source voltage VGSS is limited to ±20 V, and gate threshold VGS(th) is 0.80 V min to 1.50 V max at VDS = VGS, ID = 1 mA. |
| 2 | SOURCE | passive | Source terminal: body diode forward voltage VSD is 1.4 V max at IS = 0.44 A and VGS = 0 V. |
| 3 | DRAIN | passive | Drain terminal: drain-source voltage VDS is rated 50 V, continuous drain current ID is 0.22 A, and RDS(on) is 3.5 Ω max at VGS = 10 V (6 Ω max at VGS = 4.5 V). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `BSS138`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bss138-etched.step` / `bss138-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bss138.step` / `bss138.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175552680038400) (5 pp, sha256 `0c1c1f76b4802dda`, retrieved 2026-10-08, 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/bss138-datasheet.pdf)