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KSC3953-C-STU from FSC,Fairchild Semiconductor

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KSC3953-C-STU

Manufacturer: FSC, 仙童, FAIRCHILD

NPN Epitaxial Silicon Transistor
Partnumber Manufacturer Quantity Availability
KSC3953-C-STU,KSC3953CSTU FSC, 仙童, FAIRCHILD 273489 In Stock

Description and Introduction

NPN Epitaxial Silicon Transistor Here are the factual details about part **KSC3953-C-STU** from the manufacturer **仙童 (Fairchild Semiconductor)**:

### **Specifications:**
- **Manufacturer:** Fairchild Semiconductor (仙童)  
- **Part Number:** KSC3953-C-STU  
- **Type:** PNP Bipolar Junction Transistor (BJT)  
- **Package:** SOT-23 (Small Outline Transistor)  
- **Polarity:** PNP  
- **Maximum Collector-Base Voltage (VCB):** -40V  
- **Maximum Collector-Emitter Voltage (VCE):** -40V  
- **Maximum Emitter-Base Voltage (VEB):** -5V  
- **Continuous Collector Current (IC):** -200mA  
- **Total Power Dissipation (Ptot):** 225mW  
- **DC Current Gain (hFE):** 60 to 320 (depending on operating conditions)  
- **Transition Frequency (fT):** 200MHz (typical)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions:**  
The **KSC3953-C-STU** is a high-voltage, high-speed PNP transistor in a compact SOT-23 package. It is designed for general-purpose amplification and switching applications.  

### **Features:**  
- **High Voltage Capability** (up to -40V)  
- **High Current Gain (hFE)** for improved efficiency  
- **Low Saturation Voltage** for better switching performance  
- **Compact SOT-23 Package** for space-saving PCB designs  
- **Suitable for High-Speed Switching** (fT = 200MHz)  

This information is based on Fairchild Semiconductor's datasheet for the **KSC3953-C-STU** PNP transistor.

Application Scenarios & Design Considerations

NPN Epitaxial Silicon Transistor

Alternative Part Number

  • 2SC3953 --: Same 2SC3953 transistor type in the standard 2SC naming series, electrically equivalent NPN high-frequency transistor suitable as a direct substitute.
  • 2SC3953-C --: Equivalent 2SC3953 transistor with the same C current gain rank, matching the original KSC3953-C specifications.
  • 2SC3953K --: Alternative 2SC3953 variant from a different series prefix, offering comparable NPN high-frequency performance for the same application.
  • MJE340 --: General-purpose high-voltage NPN transistor with similar ratings; usable as a functional substitute where exact matching is not critical.
  • 2N5551 --: General-purpose high-voltage NPN transistor with similar voltage and current ratings, suitable for many low-power switching and amplifier applications.
  • MPSA42 --: High-voltage NPN transistor commonly used as an alternative in similar low-current, high-voltage circuits, though pinout and gain should be verified.

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