component
BC857BDW1T1G
Public Made by Adomby adom
onsemi Bipolar (BJT), SOT-363. Pinout reviewed by a person 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
markdownBC857BDW1T1G
onsemi · Bipolar (BJT) · SOT-363
BC857BDW1T1G from onsemi, in a SOT-363. 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 | EMITTER 2 | passive | Emitter terminal of Q2 with maximum emitter-base voltage rating of -5.0 V. |
| 2 | BASE 2 | input | Base terminal of Q2 for control of transistor conduction. |
| 3 | COLLECTOR 1 | output | Collector terminal of Q1 rated for maximum continuous current of -100 mA and collector-emitter voltage of -45 V. |
| 4 | EMITTER 1 | passive | Emitter terminal of Q1 with maximum emitter-base voltage rating of -5.0 V. |
| 5 | BASE 1 | input | Base terminal of Q1 for control of transistor conduction. |
| 6 | COLLECTOR 2 | output | Collector terminal of Q2 rated for maximum continuous current of -100 mA and collector-emitter voltage of -45 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-363 |
| Category | Transistors/Thyristors |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
BC857BDW1T1G - Footprint:
Package_TO_SOT_SMD:SOT-363_SC-70-6 - 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files:
bc857bdw1t1g-etched.step/bc857bdw1t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc857bdw1t1g.step/bc857bdw1t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
3a5f33908380e4f2, retrieved 2026-09-29, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).