SMBJ28A-TR

The SMBJ28A-TR is a transient voltage suppressor (TVS) diode manufactured by STMicroelectronics, designed to protect sensitive electronic components from voltage spikes and transients. This device is particularly useful in applications where overvoltage protection is critical, such as in telecommunications, automotive electronics, and consumer electronics.

Key Features:

1. Voltage Rating: The SMBJ28A-TR is rated for a breakdown voltage of approximately 28 volts. This makes it suitable for clamping voltage spikes that exceed this threshold, thereby protecting downstream components.

2. Power Dissipation: The device can handle a peak power dissipation of up to 600 watts for a very short duration (typically 8/20 µs pulse). This high power rating allows it to absorb significant energy from transient events without failing.

3. Low Clamping Voltage: The SMBJ28A-TR features a low clamping voltage, which minimizes the voltage seen by the protected circuit during a transient event. This is crucial for ensuring that sensitive components are not damaged.

4. Package Type: The SMBJ28A-TR is housed in a DO-214AA (SMB) package, which is a surface-mount device (SMD) that provides a compact footprint. This makes it suitable for high-density circuit board layouts.

5. Temperature Range: The operating temperature range for the SMBJ28A-TR is typically from -55°C to +150°C, allowing it to function reliably in a variety of environmental conditions.

6. Fast Response Time: The device is designed to respond quickly to transient events, ensuring that it can effectively clamp voltage spikes before they can damage sensitive components.

7. Bidirectional Protection: The SMBJ28A-TR is a bidirectional device, meaning it can protect against voltage transients in both directions. This is particularly useful in AC applications or circuits where the polarity of the voltage can change.

8. Compliance and Standards: The SMBJ28A-TR complies with various industry standards, making it suitable for use in applications that require adherence to specific regulatory requirements.

Applications:

• Telecommunications Equipment: Protecting data lines and power supplies from voltage spikes.
• Automotive Electronics: Safeguarding sensitive components from transients caused by load dumps or inductive kickback.
• Consumer Electronics: Providing overvoltage protection for devices such as smartphones, tablets, and home appliances.
• Industrial Equipment: Ensuring the reliability of control systems and sensors in harsh environments.

Conclusion:

The SMBJ28A-TR from STMicroelectronics is a robust and reliable transient voltage suppressor that offers excellent protection for sensitive electronic components against voltage transients. Its combination of high power handling, low clamping voltage, and bidirectional capabilities makes it an ideal choice for a wide range of applications in various industries.