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KSC945CG from FAIRCHILD,Fairchild Semiconductor

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KSC945CG

Manufacturer: FAIRCHILD, FSC

Audio Frequency Amplifier & High Frequency OSC.

Partnumber Manufacturer Quantity Availability
KSC945CG FAIRCHILD, FSC 2520 In Stock

Description and Introduction

Audio Frequency Amplifier & High Frequency OSC. The **KSC945CG** is a general-purpose NPN bipolar junction transistor (BJT) manufactured by **Fairchild Semiconductor** (now part of ON Semiconductor). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:

### **Specifications:**
- **Transistor Type:** NPN  
- **Maximum Collector-Base Voltage (VCB):** 60V  
- **Maximum Collector-Emitter Voltage (VCE):** 50V  
- **Maximum Emitter-Base Voltage (VEB):** 5V  
- **Maximum Collector Current (IC):** 150mA  
- **Power Dissipation (PD):** 400mW  
- **DC Current Gain (hFE):** 60 – 320 (depending on operating conditions)  
- **Transition Frequency (fT):** 300MHz (typical)  
- **Operating Temperature Range:** -55°C to +150°C  
- **Package Type:** TO-92  

### **Descriptions:**
- The **KSC945CG** is a low-power, high-gain NPN transistor designed for general-purpose amplification and switching applications.  
- It is commonly used in audio amplifiers, signal processing circuits, and small-signal switching.  
- The TO-92 package makes it suitable for through-hole PCB mounting.  

### **Features:**
- **High DC Current Gain (hFE)** for improved signal amplification.  
- **Low Noise Performance**, making it suitable for audio applications.  
- **Fast Switching Speed**, useful in high-frequency circuits.  
- **Reliable and Robust Construction** for stable operation.  

This transistor is a direct replacement for similar NPN transistors like the **2SC945** and **BC547**.  

(Note: Always refer to the official datasheet for precise values and application guidelines.)

Application Scenarios & Design Considerations

Audio Frequency Amplifier & High Frequency OSC.

Alternative Part Number

  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching and amplification characteristics, commonly used as a substitute for KSC945 in low-power circuits.
  • BC547 --: Standard NPN small-signal transistor with comparable current gain and voltage ratings, suitable for general amplification and switching applications.
  • 2SC1815 --: Japanese NPN audio/small-signal transistor with similar electrical characteristics and pinout, often used as a direct replacement in low-frequency amplifier circuits.
  • 2SC945 --: Original Japanese 2SC945 NPN audio transistor; the KSC945CG is a Fairchild second-source of this exact device, so electrical characteristics and pinout match closely.

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