CNCHIPDEPOT Original Part
2N3904
2N3904 NPN BJT transistor with 40V VCEO, 200mA collector current, 625mW power and TO-92 package.
Transistor PolarityNPN
Collector-Emitter Voltage (VCEO)40 V
Collector Current (IC)200 mA
DC Current Gain (hFE)100 Min @ IC = 10 mA, VCE = 1 V
Power Dissipation (PD)625 mW
PackageTO-92
Product Overview
The 2N3904 is an NPN bipolar junction transistor designed for general-purpose switching and small-signal amplification. It features a 40V collector-emitter voltage rating, 200mA maximum collector current, and a minimum DC current gain of 100 at 10mA collector current. Its 300MHz transition frequency makes it suitable for compact analog, signal-processing, and low-current switching circuits.
Packaged in a TO-92 through-hole package, the 2N3904 is widely suited to breadboard, prototype, repair, and general-purpose PCB designs. It can be used in signal amplification, transistor switching, buffering, interface circuits, and other low-power discrete control applications.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | 2N3904 |
| Brand | CNCHIPDEPOT |
| Package | TO-92 |
| Product Type | BJT |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage (VCEO) | 40 V |
| Collector Current (IC) | 200 mA |
| DC Current Gain (hFE) | 100 Min @ IC = 10 mA, VCE = 1 V |
| Power Dissipation (PD) | 625 mW |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.3 V Max @ IC = 50 mA, IB = 5 mA |
| Transition Frequency (fT) | 300 MHz |
| Operating Temperature | -55°C to +150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-226-3 / TO-92-3 / TO-226AA |
| Collector Cutoff Current | 50 nA Max |
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 | Direct Replacement | Same MPN, widely used industry standard. |
| Texas Instruments | 2N3904 | Cross Reference | Equivalent specifications, verify package options. |
| Fairchild Semiconductor | 2N3904 | Direct Replacement | Original manufacturer, same electrical parameters. |
| STMicroelectronics | BC547 | Functional Alternative | Similar NPN BJT characteristics, check pinout and package. |
Datasheet
Download the datasheet or contact us for additional technical information.
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Typical Applications
- General-purpose small-signal amplification
- Low-current NPN switching circuits
- Signal buffer and interface stages
- Analog signal conditioning circuits
- LED and indicator driver circuits
- Prototype and breadboard electronics
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.
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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.