component
BC546-TA
Public Made by Adomby adom
Changjing Bipolar (BJT), TO-92-3. 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
markdownBC546-TA
Changjing · Bipolar (BJT) · TO-92-3
BC546-TA from Changjing, in a TO-92-3. 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 | COLLECTOR | passive | Collector terminal of the NPN transistor; the datasheet gives VCEO up to 65 V (BC546), IC continuous 0.1 A, and PC 625 mW for the device. |
| 2 | BASE | passive | Base terminal of the NPN transistor; the datasheet gives VEBO up to 6 V (BC546/BC547) and 5 V (BC548) and the base-emitter drive conditions used for VBE(sat) (IC=100mA, IB=5mA). |
| 3 | EMITTER | passive | Emitter terminal of the NPN transistor; the datasheet gives the emitter-base breakdown condition IE=10μA, IC=0 with a minimum of 5 V to 6 V depending on variant. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92-3 |
| 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-emitter voltage (BC546) | VCEO | 65 | V | 1 | |||
| Collector-base voltage (BC546) | VCBO | 80 | V | 1 | |||
| Emitter-base voltage (BC546) | VEBO | 6 | V | 1 | |||
| Collector current-continuous | IC | 0.1 | A | 1 | |||
| Collector power dissipation | PC | 625 | mW | 1 | |||
| Junction temperature | Tj | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance from junction to ambient | RθJA | 200 | ℃/W | 1 | |||
| Collector-base breakdown voltage (BC546) | V(BR)CBO | 80 | V | IC= 0.1mA,IE=0 | 2 | ||
| Collector-emitter breakdown voltage (BC546) | V(BR)CEO | 65 | V | IC=1mA,IB=0 | 2 | ||
| Emitter-base breakdown voltage (BC546) | V(BR)EBO | 6 | V | IE=10μA,IC=0 | 2 | ||
| Collector cut-off current (BC546) | ICBO | 0.1 | μA | VCB=70V,IE=0 | 2 | ||
| Emitter cut-off current | IEBO | 0.1 | μA | VEB=5V,IC=0 | 2 | ||
| DC current gain | hFE | 110 | 800 | VCE=5V, IC=2mA | 2 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.3 | V | IC=100mA,IB=5mA | 2 | ||
| Base-emitter saturation voltage | VBE(sat) | 1.1 | V | IC=100mA,IB=5mA | 2 | ||
| Base-emitter voltage | VBE | 0.58 | 0.7 | V | VCE=5V, IC=2mA | 2 | |
| Base-emitter voltage | VBE | 0.75 | V | VCE=5V, IC=10mA | 2 | ||
| Collector output capacitance | Cob | 4.5 | pF | VCB=10V,IE=0, f=1MHz | 2 | ||
| Transition frequency | fT | 150 | MH | VCE=5V,IC=10mA, f=100MHz | 2 |
CAD (KiCad official)
- Symbol:
BC546-TA - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
bc546-ta-etched.step/bc546-ta-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc546-ta.step/bc546-ta.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
068ebd7ca4658019, retrieved 2026-10-18, tier: lcsc) - 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).