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KSA539 from FAIRCHIL,Fairchild Semiconductor

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KSA539

Manufacturer: FAIRCHIL, FAIRCHILD

PNP Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KSA539 FAIRCHIL, FAIRCHILD 2000 In Stock

Description and Introduction

PNP Epitaxial Silicon Transistor Here are the factual details about part **KSA539** from the **FAIRCHILD** manufacturer based on available specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Fairchild Semiconductor  
- **Part Number:** KSA539  
- **Transistor Type:** PNP Bipolar Junction Transistor (BJT)  
- **Collector-Base Voltage (VCBO):** -50V  
- **Collector-Emitter Voltage (VCEO):** -50V  
- **Emitter-Base Voltage (VEBO):** -5V  
- **Collector Current (IC):** -500mA (max)  
- **Power Dissipation (PD):** 625mW (max)  
- **DC Current Gain (hFE):** 60-320 (depending on variant)  
- **Transition Frequency (fT):** 100MHz (typical)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions:**
- The **KSA539** is a general-purpose PNP transistor designed for amplification and switching applications.  
- It is housed in a **TO-92** package, making it suitable for compact circuit designs.  
- This transistor is commonly used in audio amplifiers, signal processing, and low-power switching circuits.  

### **Features:**
- **High current gain (hFE)** for improved signal amplification.  
- **Low saturation voltage**, enhancing efficiency in switching applications.  
- **Wide operating temperature range**, suitable for various environments.  
- **Complementary NPN pair:** Often paired with **KSC3503** for push-pull amplifier circuits.  

For exact performance characteristics, always refer to the **Fairchild datasheet** for the KSA539.

Application Scenarios & Design Considerations

PNP Epitaxial Silicon Transistor

Alternative Part Number

  • BC337 --: Widely available NPN general-purpose transistor with similar current and voltage ratings, suitable replacement for low-power switching and amplification.
  • 2N3904 --: Very common NPN small-signal transistor with comparable gain and switching characteristics, easy to source and inexpensive.
  • 2SC1815 --: Japanese NPN general-purpose transistor with similar electrical characteristics and pinout, commonly used as an alternative in audio and switching circuits.
  • 2SA1015 --: Widely available PNP general-purpose transistor with similar low-power audio switching characteristics and complementary to 2SC1815.
  • BC557 --: Common PNP transistor in TO-92 with comparable voltage and current ratings, suitable for general-purpose amplification and switching.
  • 2N3906 --: Standard PNP switching transistor with similar small-signal ratings, easy to source and often used as a drop-in for general-purpose PNP applications.

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