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S8550-D

Manufacturer: FAIRCHILD

PNP Silicon Transistors

Partnumber Manufacturer Quantity Availability
S8550-D,S8550D FAIRCHILD 3700 In Stock

Description and Introduction

PNP Silicon Transistors The S8550-D is a PNP bipolar junction transistor (BJT) commonly used in amplification and switching applications.  

### **Manufacturer Specifications:**  
- **Manufacturer:** Multiple manufacturers produce the S8550-D, including **Fairchild Semiconductor (now ON Semiconductor)**, **STMicroelectronics**, and others.  
- **Transistor Type:** PNP  
- **Package:** SOT-23 (Surface Mount)  
- **Collector-Base Voltage (VCBO):** -30V  
- **Collector-Emitter Voltage (VCEO):** -25V  
- **Emitter-Base Voltage (VEBO):** -5V  
- **Collector Current (IC):** -500mA (continuous)  
- **Power Dissipation (Ptot):** 625mW  
- **DC Current Gain (hFE):** 85 to 300 (depending on variant)  
- **Transition Frequency (fT):** 100MHz (typical)  

### **Descriptions:**  
- The S8550-D is a small-signal PNP transistor designed for low-power amplification and switching.  
- It is commonly used in audio amplifiers, signal processing, and driver circuits.  
- The SOT-23 package makes it suitable for compact PCB designs.  

### **Features:**  
- High current gain (hFE) for efficient signal amplification.  
- Low saturation voltage for improved switching performance.  
- Suitable for surface-mount applications.  
- RoHS compliant in most variants.  

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Application Scenarios & Design Considerations

PNP Silicon Transistors

Alternative Part Number

  • 2N3906 --: Widely available PNP general-purpose transistor with similar current and voltage ratings, suitable for low-power switching and amplification.
  • BC557 --: Popular PNP transistor with comparable Vceo and current capability, commonly used as a drop-in replacement in many circuits.
  • 2SA1015 --: PNP transistor with similar electrical characteristics and pinout, often used in audio and general-purpose applications.
  • MMBT3906 --: SMD PNP transistor with similar electrical ratings to the S8550, useful when a surface-mount alternative is acceptable.

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