component
2SC4548
Public Made by Adomby adom
Changjing Bipolar (BJT), SOT-89-3L. 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
markdown2SC4548
Changjing · Bipolar (BJT) · SOT-89-3L
2SC4548 from Changjing, in a SOT-89-3L. 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 | BASE | input | NPN transistor base terminal; the emitter-base breakdown voltage V(BR)EBO is 5 V minimum at IE=10µA, and VBE(sat) is 1 V max at IC=50mA, IB=5mA. |
| 2 | COLLECTOR | passive | NPN transistor collector terminal; limited to 400 V VCBO and 400 V VCEO, 200 mA collector current IC, and 500 mW collector power dissipation PC. |
| 3 | EMITTER | passive | NPN transistor emitter terminal; the emitter-base voltage rating VEBO is 5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| 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 | V(BR)CBO | 400 | V | IC=10µA,IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 400 | V | IC=1mA,IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 5 | V | IE=10µA,IC=0 | 1 | ||
| Collector cut-off current | ICBO | 0.1 | µA | VCB=300V,IE=0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | µA | VEB=4V,IC=0 | 1 | ||
| DC current gain | hFE | 60 | 200 | VCE=10V, IC=50mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.6 | V | IC=50mA,IB=5mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 1 | V | IC=50mA,IB=5mA | 1 | ||
| Transition frequency | fT | 70 | MHz | VCE=30V,IC=10mA | 1 | ||
| Collector output capacitance | Cob | 4 | pF | VCB=30V, IE=0, f=1MHz | 1 | ||
| Collector-Base Voltage | VCBO | 400 | V | 1 | |||
| Collector-Emitter Voltage | VCEO | 400 | V | 1 | |||
| Emitter-Base Voltage | VEBO | 5 | V | 1 | |||
| Collector Current | IC | 200 | mA | 1 | |||
| Collector Power Dissipation | PC | 500 | mW | 1 | |||
| Junction Temperature | Tj | 150 | ℃ | 1 | |||
| Storage Temperature | Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal Resistance From Junction To Ambient | RθJA | 250 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
2SC4548 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
2sc4548-etched.step/2sc4548-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sc4548.step/2sc4548.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (1 pp, sha256
3b3f66e62d088c7e, retrieved 2026-10-20, 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).