CNCHIPDEPOT Original Part
2N5551
2N5551 NPN BJT transistor with 160V VCEO, 600mA collector current, 625mW power and TO-92 package.
Transistor PolarityNPN
Collector-Emitter Voltage (VCEO)160 V
Collector Current (IC)600 mA
DC Current Gain (hFE)80 Min @ IC = 10 mA, VCE = 5 V
Power Dissipation (PD)625 mW
PackageTO-92
Product Overview
The 2N5551 is an NPN bipolar junction transistor designed for high-voltage small-signal amplification, switching, and interface applications. It features a 160V collector-emitter voltage rating, 600mA maximum collector current, and a minimum DC current gain of 80 at 10mA collector current. Its relatively high voltage capability makes it suitable for analog and control circuits operating above the range of typical general-purpose low-voltage BJTs.
Packaged in a TO-92 through-hole package, the 2N5551 is suitable for high-voltage signal amplification, level shifting, discrete control, and low-current switching. Its 300MHz transition frequency also supports signal-processing and amplifier stages where both voltage headroom and moderate frequency performance are required.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | 2N5551 |
| Brand | CNCHIPDEPOT |
| Package | TO-92 |
| Product Type | BJT |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage (VCEO) | 160 V |
| Collector Current (IC) | 600 mA |
| DC Current Gain (hFE) | 80 Min @ IC = 10 mA, VCE = 5 V |
| Power Dissipation (PD) | 625 mW |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.2 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 Long Body |
| Collector Cutoff Current (ICBO) | 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 |
|---|---|---|---|
| Texas Instruments | 2N3904 | Possible Substitute | Lower VCEO (40V vs 160V), suitable for low-voltage applications. |
| ON Semiconductor | 2N5551 | Exact Equivalent | Same MPN from major manufacturer. |
| Fairchild Semiconductor | 2N5551 | Direct Replacement | Original manufacturer, check package options. |
| Rohm Semiconductor | 2SC1815 | Compatible Option | NPN BJT, check pin configuration and power dissipation. |
| STMicroelectronics | BC547B | Functional Alternative | NPN BJT, similar voltage/current specs, verify hFE range. |
Datasheet
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Typical Applications
- High-voltage small-signal amplification
- High-voltage NPN switching circuits
- Voltage level-shifting circuits
- Analog signal conditioning stages
- Discrete interface and control circuits
- Through-hole high-voltage amplifier designs
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.
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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.