component
BC817-40
Public Made by Adomby adom
UMW Bipolar (BJT), SOT-23-3. 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
markdownBC817-40
UMW · Bipolar (BJT) · SOT-23-3
BC817-40 from UMW, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BASE | input | Base terminal of NPN transistor; maximum collector-base voltage is 50 V. |
| 2 | EMITTER | passive | Emitter terminal of NPN transistor; maximum emitter-base voltage is 5 V. |
| 3 | COLLECTOR | passive | Collector terminal of NPN transistor; maximum collector-emitter voltage is 45 V and maximum continuous collector current is 0.5 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23-3 |
| Category | Transistors/Thyristors |
| 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 breakdown voltage | VCBO | 50 | V | IC= 10μA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | VCEO | 45 | V | IC= 10mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | VEBO | 5 | V | IE= 1μA, IC=0 | 1 | ||
| Collector cutoff current | ICBO | 0.1 | μA | VCB= 45 V, IE=0 | 1 | ||
| Emitter cutoff current | IEBO | 0.1 | μA | VEB= 4V, IC=0 | 1 | ||
| DC current gain hFE(1) | hFE(1) | 100 | 600 | VCE= 1V, IC= 100mA | 1 | ||
| DC current gain hFE(2) | hFE(2) | 40 | VCE= 1V, IC= 500mA | 1 | |||
| Collector-emitter saturation voltage | VCE(sat) | 0.7 | V | IC= 500mA, IB= 50mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 1.2 | V | IC= 500mA, IB= 50mA | 1 | ||
| Base-emitter voltage | VBE | 1.2 | V | VCE= 1 V, IC= 500mA | 1 | ||
| Collector capacitance | Cob | 10 | pF | VCB=10V, f=1MHz | 1 | ||
| Transition frequency | fT | 100 | MHz | VCE= 5 V, IC= 10mA, f=100MHz | 1 | ||
| Collector-base voltage | VCBO | 50 | V | Ta=25℃ unless otherwise noted | 1 | ||
| Collector-emitter voltage | VCEO | 45 | V | Ta=25℃ unless otherwise noted | 1 | ||
| Emitter-base voltage | VEBO | 5 | V | Ta=25℃ unless otherwise noted | 1 | ||
| Collector current, continuous | IC | 0.5 | A | Ta=25℃ unless otherwise noted | 1 | ||
| Collector power dissipation | PC | 0.3 | W | Ta=25℃ unless otherwise noted | 1 | ||
| Junction temperature | TJ | 150 | ℃ | 1 | |||
| Storage temperature | TSTG | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
BC817-40 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
bc817-40-etched.step/bc817-40-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc817-40.step/bc817-40.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (3 pp, sha256
691dd222da71b060, retrieved 2026-09-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).