SMBJ28A

The SMBJ28A is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., 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 is rated for a breakdown voltage of approximately 28 volts, making it suitable for clamping voltage spikes that exceed this threshold.

2. Power Dissipation: It has a peak power dissipation capability of around 600 watts, allowing it to absorb significant energy from transient events without failing.

3. Package Type: The SMBJ28A is housed in a DO-214AA (SMB) package, which is a surface-mount device (SMD) that provides a compact footprint for easy integration into circuit boards. The package is designed for efficient thermal management and reliable performance.

4. Clamping Voltage: The device features a low clamping voltage, which ensures that the voltage across the protected load remains within safe limits during transient events.

5. Response Time: The SMBJ28A has a fast response time, typically in the nanosecond range, allowing it to react quickly to voltage spikes and protect downstream components effectively.

6. Operating Temperature Range: It operates effectively over a wide temperature range, typically from -55°C to +150°C, making it suitable for various environmental conditions.

7. Applications: Common applications include ESD protection, surge protection in power supplies, and safeguarding sensitive components in automotive and industrial electronics.

8. Compliance and Standards: The SMBJ28A meets various industry standards for reliability and performance, ensuring it can be used in critical applications where compliance is necessary.

Electrical Characteristics:

• Reverse Stand-off Voltage (V_R): 28V
• Breakdown Voltage (V_BR): Typically around 31V
• Clamping Voltage (V_C): Approximately 45V at a specified peak pulse current
• Peak Pulse Power (P_PP): 600W (for 8/20μs waveform)

Conclusion:

The SMBJ28A from Littelfuse Inc. is a robust and reliable transient voltage suppressor diode that provides essential protection for electronic circuits against voltage transients. Its combination of high power handling, fast response time, and compact packaging makes it an ideal choice for a wide range of applications requiring overvoltage protection.