CNCHIPDEPOT Original Part
S8550
S8550 PNP BJT transistor with 25V VCEO, 500mA collector current, 300mW power rating and SOT-23 package.
Transistor PolarityPNP
Collector-Emitter Voltage (VCEO)25 V
Collector Current (IC)500 mA
DC Current Gain (hFE)120–400 @ IC = 50 mA, VCE = -1 V
Power Dissipation (PD)300 mW
PackageSOT-23
Product Overview
The S8550 is a PNP bipolar junction transistor (BJT) designed for low-voltage switching and general-purpose amplification. It features a 25V collector-emitter voltage rating, 500mA maximum collector current, and 300mW power dissipation. Its current gain and switching characteristics make it suitable for low-power load control and discrete signal circuits.
Packaged in a compact SOT-23 surface-mount package, the S8550 supports PNP high-side switching, LED control, and small-load driver applications. It can also be used in complementary transistor configurations with a suitable NPN device. Its surface-mount design enables compact PCB layouts, while proper base drive and thermal management help ensure reliable circuit operation.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | S8550 |
| Brand | CNCHIPDEPOT |
| Package | SOT-23 |
| Product Type | BJT |
| Transistor Polarity | PNP |
| Collector-Emitter Voltage (VCEO) | 25 V |
| Collector Current (IC) | 500 mA |
| DC Current Gain (hFE) | 120–400 @ IC = -50 mA, VCE = -1 V |
| Power Dissipation (PD) | 300 mW |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 600 mV Max (Magnitude) @ IC = -500 mA, IB = -50 mA |
| Transition Frequency (fT) | 150 MHz @ IC = -20 mA, VCE = -6 V |
| Collector-Base Voltage (VCBO) | 40 V |
| Emitter-Base Voltage (VEBO) | 5 V |
| Maximum Junction Temperature (TJ) | 150°C |
| Mounting Type | Surface Mount |
| Pin Configuration | 1: Base, 2: Emitter, 3: Collector |
| Collector Cutoff Current (ICBO) | 0.1 µA Max (Magnitude) @ VCB = -40 V |
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 | 2N3906 | Functional Alternative | PNP transistor, check voltage and current ratings. |
| Rohm Semiconductor | 2SB1386 | Possible Replacement | Confirm hFE and power dissipation specs. |
| Toshiba | 2SC1815 | Complementary Pair | NPN counterpart, use with circuit adjustment. |
| STMicroelectronics | BC557 | Cross Reference | Similar PNP characteristics, verify package type. |
Datasheet
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Typical Applications
- Low-voltage PNP high-side switching circuits
- LED indicator and small-load control
- General-purpose PNP signal amplification
- Complementary NPN/PNP switching stages
- Logic-controlled transistor driver circuits
- Compact surface-mount switching circuits
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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