component
BC546B
Public Made by Adomby adom
YFW Bipolar (BJT), TO-92. 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
markdownBC546B
YFW · Bipolar (BJT) · TO-92
BC546B from YFW, in a TO-92. 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 | C | passive | Collector; BVCEO 65V for BC546, IC max 100 mA. |
| 2 | B | passive | Base; BVEBO 6V for BC546/547, hFE 200-450 for the B class at VCE=5V, IC=2mA. |
| 3 | E | passive | Emitter; connect to the most negative node (NPN), total power dissipation 500 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-92 |
| 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 Voltage (BC546 column) | BVCBO | 80 | V | 1 | |||
| Collector-Emitter Voltage (BC546 column) | BVCEO | 65 | V | 1 | |||
| Emitter-Base Voltage (BC546/547 column) | BVEBO | 6 | V | 1 | |||
| Collector Current | IC | 100 | mA | 1 | |||
| Collector Power Dissipation | PC | 500 | mW | 1 | |||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature | Tstg | -55 | 150 | °C | 1 | ||
| Collector cut-off current | ICBO | 15 | nA | VCB = 30V, IE = 0 | 1 | ||
| Emitter cut-off current | IEBO | 15 | nA | VEB = 5V, IC = 0 | 1 | ||
| DC current gain (grade B, 200-450) | hFE | 200 | 450 | VCE = 5V, IC = 2mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.25 | V | IC = 10mA, IB = 0.5mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.6 | V | IC = 100mA, IB = 5mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 1 | V | IC = 100mA, IB = 5mA | 1 | ||
| Transition frequency | fT | 200 | MHz | VCE = 5V, IB = 10mA | 1 | ||
| Collector output capacitance | Cob | 6 | pF | VCB=10V, IE=0, f=1MHz | 1 |
CAD (KiCad official)
- Symbol:
BC546B - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
bc546b-etched.step/bc546b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc546b.step/bc546b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (3 pp, sha256
0cef28b9533d14be, retrieved 2026-10-19, tier: lcsc) - 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).