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KSP43 from FAIRCHILD,Fairchild Semiconductor

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KSP43

Manufacturer: FAIRCHILD, FAIRCHIL

NPN Epitaxial Silicon Transistor

Partnumber Manufacturer Quantity Availability
KSP43 FAIRCHILD, FAIRCHIL 8000 In Stock

Description and Introduction

NPN Epitaxial Silicon Transistor The KSP43 is a PNP transistor manufactured by FAIRCHILD (Fairchild Semiconductor). Below are the specifications, descriptions, and features based on available knowledge:  

### **Specifications:**  
- **Transistor Type:** PNP  
- **Maximum Collector-Base Voltage (VCB):** -50V  
- **Maximum Collector-Emitter Voltage (VCE):** -50V  
- **Maximum Emitter-Base Voltage (VEB):** -5V  
- **Continuous Collector Current (IC):** -500mA  
- **Total Power Dissipation (Ptot):** 625mW  
- **DC Current Gain (hFE):** 40 to 160 (depending on operating conditions)  
- **Transition Frequency (fT):** 50MHz (typical)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Description:**  
The KSP43 is a general-purpose PNP bipolar junction transistor (BJT) designed for amplification and switching applications. It is housed in a TO-92 package, making it suitable for low-power circuits.  

### **Features:**  
- High current gain (hFE)  
- Low saturation voltage  
- Suitable for switching and amplification  
- Compact TO-92 package  

For exact performance characteristics, refer to the official datasheet from Fairchild Semiconductor.

Application Scenarios & Design Considerations

NPN Epitaxial Silicon Transistor

Alternative Part Number

  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching characteristics and pinout, suitable drop-in replacement in most KSP43 applications.
  • BC547 --: Standard NPN small-signal transistor with comparable current gain and voltage ratings, commonly used as an alternative to KSP43 in low-power switching and amplification circuits.
  • MMBT3904 --: SMD version of the popular 2N3904 NPN transistor, offering similar electrical performance for space-constrained designs where the through-hole KSP43 is used.
  • MPSA43 --: Same NPN high-voltage transistor family with comparable Vceo and current ratings, widely available and pin-compatible.
  • 2N5551 --: General-purpose high-voltage NPN transistor with similar voltage and current specs, suitable for many KSP43 applications.
  • BC639 --: NPN medium-power transistor with adequate voltage and current ratings, usable as a functional substitute in low-power switching circuits.

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