2N2221AUA-Transistor NPN Amplifier Transistor in SOT-23 Package by ON Semiconductor

2N2221AUA-Transistor Overview

The 2N2221AUA is a widely used NPN bipolar junction transistor (BJT) designed for general-purpose switching and amplification in low to medium power applications. It offers reliable performance with a collector current rating up to 0.8A and a maximum collector-emitter voltage of 40V, making it suitable for a variety of industrial and electronic circuits. This transistor is known for fast switching speed and moderate gain, ensuring efficient operation in signal processing and control tasks. Its TO-92 package supports easy integration on standard PCBs, favored by engineers and sourcing specialists for robust, cost-effective solutions. More details are available at IC Manufacturer.

2N2221AUA-Transistor Technical Specifications

2N2221AUA-Transistor Key Features

• High collector current capacity: Supports up to 0.8A, enabling effective handling of moderate power loads in switching circuits.
• Wide voltage ratings: Collector-emitter voltage of 40V and collector-base voltage of 75V ensures versatility in various voltage environments.
• Fast switching speed: Transition frequency of 300MHz allows for efficient operation in high-frequency amplification and switching applications.
• Robust gain range: DC current gain between 100 and 300 provides reliable amplification performance across diverse circuit designs.
• Compact TO-92 package: Facilitates easy PCB integration with standard pinout configuration, supporting automated assembly and prototyping.
• Wide temperature tolerance: Operates reliably from -55??C to +150??C, suitable for demanding industrial environments.

Typical Applications

• General-purpose switching in embedded control systems, enabling efficient load management and signal modulation in low-to-medium power circuits.
• Signal amplification in audio and sensor interface circuits, providing stable gain and frequency response for accurate signal processing.
• Driver stage in relay and solenoid control circuits, benefiting from its fast switching and moderate current handling capabilities.
• Low-noise amplification in instrumentation and measurement devices, ensuring signal integrity in precision environments.

2N2221AUA-Transistor Advantages vs Typical Alternatives

This transistor offers a balanced combination of voltage tolerance, current capacity, and switching speed compared to similar general-purpose BJTs. Its wide gain range and high transition frequency provide enhanced amplification and fast response, making it more efficient for signal and switching applications. The TO-92 package ensures easy handling and integration, while its broad operating temperature range enhances reliability in industrial uses. Overall, it delivers consistent performance with proven durability, outperforming generic alternatives that may lack stability or speed.

2N2221AUA-Transistor Brand Info

The 2N2221AUA is a standard product widely manufactured by multiple semiconductor suppliers specializing in discrete trans