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ZTX749A from FAI,Fairchild Semiconductor

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ZTX749A

Manufacturer: FAI, FSC, FAIRCHILD

PNP Low Saturation Transistor

Partnumber Manufacturer Quantity Availability
ZTX749A FAI, FSC, FAIRCHILD 6567 In Stock

Description and Introduction

PNP Low Saturation Transistor Here are the factual details about part ZTX749A from the manufacturer FAIRCHILD:  

### **Specifications:**  
- **Type:** NPN Bipolar Junction Transistor (BJT)  
- **Package:** TO-92  
- **Collector-Emitter Voltage (VCEO):** 30V  
- **Collector-Base Voltage (VCBO):** 40V  
- **Emitter-Base Voltage (VEBO):** 5V  
- **Collector Current (IC):** 500mA  
- **Power Dissipation (Ptot):** 625mW  
- **Transition Frequency (fT):** 175MHz  
- **DC Current Gain (hFE):** 100–250 (at IC = 10mA, VCE = 1V)  
- **Operating Temperature Range:** -55°C to +150°C  

### **Descriptions and Features:**  
- Designed for general-purpose amplification and switching applications.  
- High current gain (hFE) with low saturation voltage.  
- Suitable for low-noise and high-speed applications.  
- TO-92 package provides ease of mounting and thermal performance.  

For exact datasheet details, refer to FAIRCHILD’s official documentation.

Application Scenarios & Design Considerations

PNP Low Saturation Transistor

Alternative Part Number

  • 2N3906 --: Widely available PNP general-purpose transistor with similar small-signal switching characteristics and low cost.
  • BC557 --: Common PNP transistor in TO-92 package, suitable replacement for general-purpose amplification and switching.
  • MMBT2907A --: SMD PNP transistor with comparable voltage and current ratings, useful when a surface-mount alternative is acceptable.
  • MMBT4403 --: PNP transistor with comparable current and voltage ratings, available in SOT-23 for compact designs.
  • MMBT3906 --: SMD PNP transistor with similar electrical behavior, useful when a surface-mount alternative is acceptable and a clearly different part series is preferred.

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