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KST4125-MTF from FAIRCHIL,Fairchild Semiconductor

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KST4125-MTF

Manufacturer: FAIRCHIL

PNP Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KST4125-MTF,KST4125MTF FAIRCHIL 21000 In Stock

Description and Introduction

PNP Epitaxial Silicon Transistor **Part Number:** KST4125-MTF  
**Manufacturer:** FAIRCHILD  

**Specifications:**  
- **Type:** High-performance RF transistor  
- **Material:** Silicon (Si)  
- **Package:** Metal Can (TO-39)  
- **Frequency Range:** VHF to UHF bands  
- **Power Output:** High power for RF amplification  
- **Voltage Rating:** Designed for medium to high voltage applications  
- **Current Handling:** Suitable for moderate to high current levels  

**Descriptions:**  
- Designed for RF and microwave amplification applications  
- Robust construction for reliable performance in demanding environments  
- Commonly used in communication systems, transmitters, and RF circuits  

**Features:**  
- High gain and efficiency  
- Low noise performance  
- Stable operation across a wide frequency range  
- Durable metal can packaging for heat dissipation and shielding  

For exact electrical characteristics, refer to the official datasheet from FAIRCHILD.

Application Scenarios & Design Considerations

PNP Epitaxial Silicon Transistor

Alternative Part Number

  • MMBT4125 --: PNP general-purpose transistor with similar voltage and current ratings, widely available and pin-compatible in SOT-23.
  • 2N4125 --: Classic PNP transistor with comparable specifications, suitable as a direct functional replacement in through-hole designs.
  • BC557 --: Common PNP transistor with similar small-signal characteristics, easy to source and often used as a general substitute.

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