The CET3904E is a discrete NPN transistor manufactured by Central Semiconductor Corp. It is designed for general-purpose amplification and switching applications. This transistor comes in a small SOT-23 surface mount package, making it suitable for high-density circuit board designs where space is at a premium.

Applications

• General-purpose amplification
• Switching circuits
• Driver stages
• Load switches
• Portable electronics

Features

• NPN transistor
• Small SOT-23 package for surface mount applications
• Low saturation voltage
• High current capability

Benefits

• Space-saving design due to small package size
• Efficient switching performance resulting in reduced power consumption.
• Suitable for a wide range of applications due to its versatile characteristics
• Reliable operation in various electronic circuits

Additional Details

The CET3904E has a collector-emitter voltage (Vceo) of 40V and a collector current (Ic) rating of 200mA. The DC current gain (hFE) typically ranges from 100 to 300, depending on the operating conditions. The transition frequency (fT) is approximately 300 MHz, which allows for good performance in higher-frequency circuits. This transistor is lead-free and RoHS compliant.

When using the CET3904E, proper biasing is essential to ensure optimal performance. A resistor divider network is commonly used to establish the base voltage, providing stable operation over temperature variations. Additionally, a collector resistor is used to limit the collector current and prevent damage to the transistor. Always consult the datasheet for specific biasing requirements and operating conditions.

This transistor is an excellent choice for applications requiring a compact, reliable, and efficient NPN transistor. Its small size and good performance characteristics make it a popular component in many electronic devices. It is a cost-effective solution for both amplification and switching applications.