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KSC3953-D-S from FAIRCHIL,Fairchild Semiconductor

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KSC3953-D-S

Manufacturer: FAIRCHIL, FAIRCHILD

NPN Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KSC3953-D-S,KSC3953DS FAIRCHIL, FAIRCHILD 30000 In Stock

Description and Introduction

NPN Epitaxial Silicon Transistor Here are the factual details about part **KSC3953-D-S** from the manufacturer **FAIRCHILD**:

### **Specifications:**
- **Manufacturer:** FAIRCHILD  
- **Part Number:** KSC3953-D-S  
- **Type:** PNP Bipolar Junction Transistor (BJT)  
- **Package:** SOT-23 (Small Outline Transistor)  
- **Polarity:** PNP  
- **Maximum Collector-Emitter Voltage (VCEO):** -40V  
- **Maximum Collector-Base Voltage (VCBO):** -40V  
- **Maximum Emitter-Base Voltage (VEBO):** -5V  
- **Continuous Collector Current (IC):** -200mA  
- **Total Power Dissipation (Ptot):** 250mW  
- **DC Current Gain (hFE):** 60 to 320 (depending on operating conditions)  
- **Transition Frequency (fT):** 250MHz (typical)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions and Features:**
- **General Purpose PNP Transistor:** Designed for amplification and switching applications.  
- **High Current Gain (hFE):** Provides good linearity in amplification circuits.  
- **Low Saturation Voltage:** Efficient for switching applications.  
- **Compact SOT-23 Package:** Suitable for space-constrained PCB designs.  
- **High Transition Frequency (fT):** Suitable for RF and high-speed switching applications.  
- **Complementary NPN Part:** Often paired with KSC1845 or similar NPN transistors.  

This information is based solely on the manufacturer's datasheet and technical specifications.

Application Scenarios & Design Considerations

NPN Epitaxial Silicon Transistor

Alternative Part Number

  • 2SC3953 --: Same 2SC3953 transistor type with matching NPN high-frequency characteristics, direct functional replacement.
  • 2SC3953-D --: Equivalent 2SC3953 transistor with D current gain rank, similar VCEO and power ratings.
  • BFQ19 --: NPN high-frequency transistor with comparable voltage and current ratings, usable as a substitute in similar RF/amplifier circuits.
  • MJE340 --: Widely available NPN high-voltage transistor with comparable Vceo and current ratings; usable substitute when gain rank is not critical, though pinout and specs should be verified.

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