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BC858B-7-F
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Diodes Incorporated Bipolar Transistors - BJT, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BC858B-7-F
Diodes Incorporated · Bipolar Transistors - BJT · SOT-23
BC858B-7-F from Diodes Incorporated, 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 | B | passive | Base of the PNP transistor; emitter-base voltage is limited to -5.0 V and peak base current to -200 mA (single pulse). |
| 2 | E | passive | Emitter of the PNP transistor; peak emitter current is limited to -200 mA. |
| 3 | C | passive | Collector of the PNP transistor; for BC858B, VCEO is -30 V and VCBO is -30 V, with continuous collector current of -100 mA and peak (single pulse) of -200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | • Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 | 1 |
CAD (KiCad official)
- Symbol:
BC858B-7-F - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bc858b-7-f-etched.step/bc858b-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc858b-7-f.step/bc858b-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (7 pp, sha256
9f19c49db2adb724, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+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).
# BC858B-7-F
**Diodes Incorporated** · Bipolar Transistors - BJT · SOT-23
BC858B-7-F from Diodes Incorporated, 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 | B | passive | Base of the PNP transistor; emitter-base voltage is limited to -5.0 V and peak base current to -200 mA (single pulse). |
| 2 | E | passive | Emitter of the PNP transistor; peak emitter current is limited to -200 mA. |
| 3 | C | passive | Collector of the PNP transistor; for BC858B, VCEO is -30 V and VCBO is -30 V, with continuous collector current of -100 mA and peak (single pulse) of -200 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | • Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 | 1 |
## CAD (KiCad official)
- Symbol: `BC858B-7-F`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bc858b-7-f-etched.step` / `bc858b-7-f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc858b-7-f.step` / `bc858b-7-f.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/BC858B-7-F.pdf) (7 pp, sha256 `9f19c49db2adb724`, retrieved 2026-10-27, tier: manufacturer)
- **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/bc858b-7-f-datasheet.pdf)