component
BFS20W
Public Made by Adomby adom
Nexperia Bipolar Transistors - BJT, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBFS20W
Nexperia · Bipolar Transistors - BJT · SOT-323
BFS20W from Nexperia, 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 | base | input | Base terminal of the NPN transistor; peak base current IBM is limited to 200 mA. |
| 2 | emitter | passive | Emitter terminal of the NPN transistor; emitter-base voltage VEBO is limited to 4 V with the collector open. |
| 3 | collector | passive | Collector terminal of the NPN transistor; collector-base voltage VCBO is limited to 30 V and DC collector current IC to 25 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-323 |
| Category | Transistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-base voltage (open emitter) | VCBO | 30 | V | open emitter | 3 | ||
| Collector-emitter voltage (open base) | VCEO | 20 | V | open base | 3 | ||
| Emitter-base voltage (open collector) | VEBO | 4 | V | open collector | 3 | ||
| Collector current (DC) | IC | 25 | mA | 3 | |||
| Peak collector current | ICM | 25 | mA | 3 | |||
| Peak base current | IBM | 200 | mA | 3 | |||
| Total power dissipation | Ptot | 200 | mW | Tamb ≤ 25 °C; note 1 | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Junction temperature | Tj | 150 | °C | 3 | |||
| Operating ambient temperature | Tamb | -65 | 150 | °C | 3 | ||
| Thermal resistance from junction to ambient | Rth j-a | 625 | K/W | note 1 (refer to SOT323 standard mounting conditions) | 4 | ||
| Collector cut-off current | ICBO | 100 | nA | IE = 0; VCB = 20 V | 4 | ||
| Collector cut-off current | ICBO | 10 | µA | IE = 0; VCB = 20 V; Tj = 100 °C | 4 | ||
| Emitter cut-off current | IEBO | 100 | nA | IC = 0; VEB = 4 V | 4 | ||
| DC current gain | hFE | 40 | 85 | - | IC = 7 mA; VCE = 10 V | 4 | |
| Base-emitter voltage | VBE | 740 | 900 | mV | IC = 7 mA; VCE = 10 V | 4 | |
| Transition frequency | fT | 360 | 470 | MHz | IC = 5 mA; VCE = 10 V; f = 100 MHz | 4 |
CAD (KiCad official)
- Symbol:
BFS20W - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
bfs20w-etched.step/bfs20w-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bfs20w.step/bfs20w.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (8 pp, sha256
dedd61b706a44d7f, retrieved 2026-11-05, tier: manufacturer) - 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).