component
2SC4618
Public Made by Adomby adom
Changjing Bipolar (BJT), SOT-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdown2SC4618
Changjing · Bipolar (BJT) · SOT-523
2SC4618 from Changjing, in a SOT-523. 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 | passive | Base terminal of the NPN transistor, with emitter-base breakdown V(BR)EBO of 5 V minimum at IE=50µA and absolute maximum emitter-base voltage VEBO of 5 V. |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor, with absolute maximum emitter-base voltage VEBO of 5 V and maximum collector current IC of 50 mA. |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor, with absolute maximum collector-base voltage VCBO of 40 V, collector-emitter voltage VCEO of 25 V, and collector current IC of 50 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-523 |
| 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 | 40 | V | IC=50µA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 25 | V | IC=1mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 5 | V | IE=50µA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | 500 | nA | VCB=24V, IE=0 | 1 | ||
| Emitter cut-off current | IEBO | 500 | nA | VEB=3V, IC=0 | 1 | ||
| DC current gain | hFE | 56 | 270 | VCE=6V, IC=1mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.3 | V | IC=10mA, IB=1mA | 1 | ||
| Transition frequency | fT | 150 | MHz | VCE=6V, IC=1mA, f=100MHz | 1 | ||
| Collector output capacitance | Cob | 2.2 | pF | VCB=6V, IE=0, f=1MHz | 1 | ||
| Collector-Base Voltage | VCBO | 40 | V | 1 | |||
| Collector-Emitter Voltage | VCEO | 25 | V | 1 | |||
| Emitter-Base Voltage | VEBO | 5 | V | 1 | |||
| Collector Current | IC | 50 | mA | 1 | |||
| Collector Power Dissipation | PC | 150 | mW | 1 | |||
| Operation Junction and Storage Temperature Range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal Resistance From Junction To Ambient | RΘJA | 833 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
2SC4618 - Footprint:
Package_TO_SOT_SMD:SOT-523 - 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
2sc4618-etched.step/2sc4618-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2sc4618.step/2sc4618.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
b47049dc47205db9, 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).