2N2221AUB/TR Overview
The 2N2221AUB/TR is a high-performance NPN bipolar junction transistor designed for general-purpose switching and amplification applications. Offering a collector current (Ic) rating up to 800 mA and a collector-emitter voltage (Vce) of 40 V, it supports medium power handling in compact surface-mount packaging. This transistor is well-suited for industrial electronics, enabling efficient signal processing and control in various circuits. Its robust electrical characteristics ensure reliable operation under demanding conditions. Sourced from IC Manufacturer, this device meets stringent quality standards for both prototyping and high-volume production environments.
2N2221AUB/TR Key Features
- High collector current capacity: Supports up to 800 mA, enabling effective switching of medium power loads with minimal saturation losses.
- Moderate voltage rating: Collector-emitter voltage rating of 40 V allows for use in a wide range of industrial and signal amplification circuits.
- Surface-mount package: The compact SOT-23 package simplifies PCB layout, reducing assembly costs and improving thermal management.
- Reliable gain characteristics: Current gain (hFE) ranging typically between 100 to 300 ensures consistent amplification performance across applications.
2N2221AUB/TR Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Emitter Voltage (Vce) | 40 | V |
| Collector-Base Voltage (Vcb) | 75 | V |
| Emitter-Base Voltage (Veb) | 6 | V |
| Collector Current (Ic) | 800 | mA |
| Power Dissipation (Ptot) | 350 | mW |
| DC Current Gain (hFE) | 100 to 300 | ?? |
| Transition Frequency (fT) | 250 | MHz |
| Operating Temperature Range | -55 to +150 | ??C |
2N2221AUB/TR Advantages vs Typical Alternatives
This transistor offers superior current handling and voltage ratings compared to many general-purpose transistors in similar packages, providing engineers with a reliable solution for medium power switching. Its high gain and fast transition frequency enhance signal fidelity and switching speed, making it preferable for both amplification and switching roles in industrial electronics. The small form factor supports high-density PCB designs without sacrificing thermal or electrical performance.
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Typical Applications
- Switching circuits in industrial automation where reliable medium power control is essential for actuators and relays.
- Signal amplification in audio and low-frequency amplifier stages requiring stable gain and low noise.
- General-purpose transistor use in embedded control systems, including microcontroller interface circuits.
- Driver stages for LED arrays or small motors, leveraging high collector current for effective load management.
2N2221AUB/TR Brand Info
The 2N2221AUB/TR is offered by IC Manufacturer as a premium variant of the classic 2N2221 transistor family, featuring a surface-mount SOT-23 package optimized for modern PCB assembly processes. This product line is recognized for its consistent quality, robust electrical performance, and broad availability, supporting engineers and sourcing specialists in delivering reliable industrial electronics solutions worldwide.
FAQ
What is the maximum collector current rating of this transistor?
The device supports a maximum collector current of 800 mA, which makes it suitable for switching medium power loads and driving larger loads than typical low-current transistors.
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Can this transistor be used in high-frequency amplifier circuits?
Yes, with a transition frequency (fT) of approximately 250 MHz, this transistor is capable of operating efficiently in moderate high-frequency amplifier designs, providing fast switching and improved signal response.
What package type is the transistor supplied in?
The transistor is supplied in a compact SOT-23 surface-mount package, enabling space-saving PCB layouts and compatibility with automated assembly processes commonly used in industrial manufacturing.
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What is the operating temperature range for this device?
The transistor operates reliably within a temperature range from -55 ??C to +150 ??C, making it suitable for use in harsh industrial environments with variable thermal conditions.
How does the current gain (hFE) vary across the device?
The typical DC current gain ranges from 100 to 300, providing stable and consistent amplification, which is essential for applications requiring predictable transistor performance and linearity.
