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STN3904

Manufacturer: AUK

NPN Silicon Transistor

Partnumber Manufacturer Quantity Availability
STN3904 AUK 30100 In Stock

Description and Introduction

NPN Silicon Transistor The STN3904 is a general-purpose NPN bipolar junction transistor (BJT) manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Transistor Type:** NPN  
- **Maximum Collector-Emitter Voltage (VCE):** 40V  
- **Maximum Collector-Base Voltage (VCB):** 60V  
- **Maximum Emitter-Base Voltage (VEB):** 6V  
- **Continuous Collector Current (IC):** 200mA  
- **Total Power Dissipation (Ptot):** 625mW  
- **DC Current Gain (hFE):** 100 to 300 (at IC = 10mA, VCE = 1V)  
- **Transition Frequency (fT):** 250MHz  
- **Operating Temperature Range:** -55°C to +150°C  

### **Description:**  
The STN3904 is a low-power, high-gain NPN transistor designed for general-purpose amplification and switching applications. It is commonly used in signal amplification, driver circuits, and low-power switching applications.  

### **Features:**  
- High current gain (hFE)  
- Low noise performance  
- Suitable for small-signal amplification  
- Fast switching speed  
- Pb-free and RoHS compliant  

This information is based on the manufacturer's datasheet. For detailed performance characteristics, refer to the official STMicroelectronics documentation.

Application Scenarios & Design Considerations

NPN Silicon Transistor

Alternative Part Number

  • MMBT3904 --: NPN general-purpose transistor with nearly identical Vceo, Ic, and hFE specs, available in SOT-23 and widely second-sourced.
  • 2N3904 --: Classic through-hole NPN transistor with equivalent electrical ratings, ideal when a leaded package is acceptable.
  • BC847 --: Low-power NPN transistor in SOT-23 with comparable current and voltage ratings, a common European alternative.
  • BC847B --: SOT-23 NPN transistor with comparable current and voltage ratings and high hFE, a good drop-in style alternative when 45V rating is acceptable.

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