CNCHIPDEPOT Original Part
2SC4081
2SC4081 NPN BJT transistor with 50V VCEO, 150mA collector current, 200mW power and SOT-323 package.
Transistor PolarityNPN
Collector-Emitter Voltage (VCEO)50 V
Collector Current (IC)150 mA
DC Current Gain (hFE)120–560 @ IC = 50 mA, VCE = 6 V
Power Dissipation (PD)200 mW
PackageSOT-323
Product Overview
The 2SC4081 is an NPN bipolar junction transistor designed for general-purpose small-signal amplification and low-current switching. It features a 50V collector-emitter voltage rating, 150mA maximum collector current, 200mW power dissipation, and a DC current gain range of 120–560, providing stable performance in compact analog and control circuits.
Packaged in a compact SOT-323 surface-mount package, the 2SC4081 is suitable for space-constrained PCB designs. Its 180MHz transition frequency and low collector output capacitance make it useful for signal amplification, buffering, interface circuits, and other low-power electronic applications.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | 2SC4081 |
| Brand | CNCHIPDEPOT |
| Package | SOT-323 |
| Product Type | BJT |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage (VCEO) | 50 V |
| Collector Current (IC) | 150 mA |
| DC Current Gain (hFE) | 120–560 @ IC = 50 mA, VCE = 6 V |
| Power Dissipation (PD) | 200 mW |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.4 V Max @ IC = 50 mA, IB = 5 mA |
| Transition Frequency (fT) | 180 MHz Typ |
| Storage Temperature | -55°C to +150°C |
| Mounting Type | Surface Mount |
| JEITA Package | SC-70 |
| Package Size | 2.1 × 2.0 × 1.0 mm |
| Number of Terminals | 3 |
| Collector Output Capacitance (Cob) | 2.0 pF Typ |
Cross Reference & Replacement Information
The following part numbers are commonly reviewed for replacement or compatibility matching. Always verify datasheet, package, pinout, and operating conditions before bulk purchase.
| Target Brand | Target MPN | Replace Type | Notes |
|---|---|---|---|
| ON Semiconductor | 2N3904 | General Purpose Alternative | Verify package type and hFE characteristics. |
| Rohm Semiconductor | 2SC1815 | Cross Reference | Confirm maximum collector current and frequency response. |
| Toshiba | 2SC4081 | Original Manufacturer | Same MPN from the original brand. |
| NXP Semiconductors | BC547B | Possible Replacement | Check NPN polarity, voltage, and current ratings. |
Datasheet
Download the datasheet or contact us for additional technical information.
PDF
Datasheet not uploaded yet
Contact us for technical details and replacement review support.
Contact SalesContact us for technical details and replacement review support.
Typical Applications
- General-purpose small-signal amplification
- Analog signal amplifier stages
- Low-current transistor switching circuits
- Signal buffer and interface circuits
- Compact surface-mount amplifier circuits
- Low-capacitance signal processing stages
Ordering & RFQ Information
- MOQ: Contact sales
- Lead Time: 3–7 working days for stock items
- Packaging: Reel / Tube / Tray depending on package
- Sample Availability: Available on request
- Mass Production Status: 50K+ pcs Stock / Mass Production
FAQ
Can this part replace my current model?
It may be suitable depending on your circuit requirements. Please verify datasheet, package, pinout, and test samples before bulk orders.
Can I request samples?
Yes. Please submit your RFQ with target quantity and application details.
Need this part or a compatible replacement?
Send us your target part number, BOM list, quantity, and technical requirements. CNCHIPDEPOT can help review replacement options and provide RFQ support.
Submit RFQElectronic Component Manufacturing & Quality Control
As a China electronic component factory , China Chip Depot supports component sourcing, production, testing and quality inspection for global B2B buyers. We also provide Cross Reference Alternative Parts matching services to help engineers and procurement teams identify suitable component alternatives.
SMT Assembly Workshop
SMT production and assembly capabilities supporting electronic component and PCB-related manufacturing requirements.
Semiconductor Production
Controlled production environments supporting semiconductor and electronic component manufacturing processes.
Component Testing Equipment
Electrical testing and verification equipment used to support performance checks and product consistency.
Quality Inspection Lab
Quality inspection processes help verify component condition, specifications and production consistency before shipment.
SMT Assembly Workshop
SMT production and assembly capabilities supporting electronic component and PCB-related manufacturing requirements.
Semiconductor Production
Controlled production environments supporting semiconductor and electronic component manufacturing processes.
Component Testing Equipment
Electrical testing and verification equipment used to support performance checks and product consistency.
Quality Inspection Lab
Quality inspection processes help verify component condition, specifications and production consistency before shipment.