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2SA1661-JSM
Public Made by Adomby adom
JSMSEMI Bipolar (BJT), SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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2SA1661-JSM
JSMSEMI · Bipolar (BJT) · SOT-89
2SA1661-JSM from JSMSEMI, in a SOT-89. 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 | BASE | input | Base of the PNP transistor; emitter-base voltage limited to -5 V (VEBO) and breakdown V(BR)EBO min -5 V at IE=-1 mA. |
| 2 | COLLECTOR | passive | Collector of the PNP transistor; VCBO and VCEO are -120 V and continuous collector current is -0.8 A. |
| 3 | EMITTER | passive | Emitter of the PNP transistor; the device dissipates 500 mW (PC) with a junction-to-ambient thermal resistance of 250 °C/W. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOT-89 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
2SA1661-JSM - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
2sa1661-jsm-etched.step/2sa1661-jsm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sa1661-jsm.step/2sa1661-jsm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JSMSEMI datasheet (2 pp, sha256
4ba3556a7eca4b92, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-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).
# 2SA1661-JSM
**JSMSEMI** · Bipolar (BJT) · SOT-89
2SA1661-JSM from JSMSEMI, in a SOT-89. 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 | BASE | input | Base of the PNP transistor; emitter-base voltage limited to -5 V (VEBO) and breakdown V(BR)EBO min -5 V at IE=-1 mA. |
| 2 | COLLECTOR | passive | Collector of the PNP transistor; VCBO and VCEO are -120 V and continuous collector current is -0.8 A. |
| 3 | EMITTER | passive | Emitter of the PNP transistor; the device dissipates 500 mW (PC) with a junction-to-ambient thermal resistance of 250 °C/W. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOT-89 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `2SA1661-JSM`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sa1661-jsm-etched.step` / `2sa1661-jsm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sa1661-jsm.step` / `2sa1661-jsm.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603591202692886528) (2 pp, sha256 `4ba3556a7eca4b92`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/2sa1661-jsm-datasheet.pdf)