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KST93 from FAIRCHILD,Fairchild Semiconductor

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KST93

Manufacturer: FAIRCHILD, KEC, KEC

PNP Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KST93 FAIRCHILD, KEC, KEC 45320 In Stock

Description and Introduction

PNP Epitaxial Silicon Transistor The KST93 is a PNP transistor manufactured by KEC (Korea Electronics Company). Below are the specifications, descriptions, and features based on the available factual information:  

### **Specifications:**  
- **Type:** PNP Bipolar Junction Transistor (BJT)  
- **Package:** TO-92 (Plastic Encapsulation)  
- **Collector-Base Voltage (VCBO):** -50V  
- **Collector-Emitter Voltage (VCEO):** -50V  
- **Emitter-Base Voltage (VEBO):** -5V  
- **Collector Current (IC):** -0.5A (Max)  
- **Power Dissipation (PD):** 625mW  
- **DC Current Gain (hFE):** 40 ~ 320 (depending on operating conditions)  
- **Transition Frequency (fT):** 150MHz (Typical)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions and Features:**  
- Designed for general-purpose amplification and switching applications.  
- Suitable for low to medium power circuits.  
- High current gain (hFE) range for improved performance in signal amplification.  
- Compact TO-92 package for easy PCB mounting.  
- Commonly used in audio amplifiers, driver circuits, and switching applications.  

For exact performance characteristics, refer to the official KEC datasheet.

Application Scenarios & Design Considerations

PNP Epitaxial Silicon Transistor

Alternative Part Number

  • MMBT5551 --: NPN high-voltage transistor in SOT-23, similar 160V rating and current gain, widely available and pin-compatible replacement for general switching applications.
  • 2N5551 --: Through-hole NPN high-voltage transistor with comparable Vceo and hFE characteristics; suitable if board layout allows TO-92 package.
  • BCX70 --: SOT-23 NPN transistor with similar low-current switching behavior; good general-purpose alternative when exact voltage rating is not critical.
  • MMBT3906 --: Widely available PNP general-purpose transistor in SOT-23, similar small-signal switching characteristics and pinout to the KST93.
  • BC807 --: Standard PNP switching transistor in SOT-23 with comparable voltage and current ratings, suitable drop-in replacement in most circuits.
  • 2SA1037 --: PNP small-signal transistor in SOT-23 with similar gain and switching performance, commonly used as an alternative to KST-series parts.
  • BC546 --: General-purpose NPN transistor with lower voltage rating but suitable for many low-voltage applications where KST93 is used, offering good gain and low noise.

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