SMBJ30A

The SMBJ30A 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 SMBJ30A has a breakdown voltage of approximately 30 volts, making it suitable for clamping voltage spikes that exceed this threshold. It is designed to protect circuits operating at lower voltages, ensuring that the components remain safe from damage.

2. Power Dissipation: The device can handle a peak power dissipation of up to 600 watts, which allows it to absorb significant energy from transient events without failing. This high power rating is essential for applications that may experience severe voltage surges.

3. Package Type: The SMBJ30A is housed in a DO-214AA (SMB) package, which is a surface-mount device (SMD) configuration. This package is compact and allows for easy integration into printed circuit boards (PCBs), making it ideal for space-constrained applications.

4. Response Time: The SMBJ30A features a fast response time, typically in the nanosecond range, which is crucial for effectively clamping voltage spikes before they can damage sensitive components.

5. Temperature Range: The operating temperature range for the SMBJ30A is typically from -55°C to +150°C, allowing it to function reliably in a variety of environmental conditions.

6. Low Leakage Current: The device exhibits low leakage current, which is important for maintaining the efficiency of the circuit and preventing unnecessary power loss during normal operation.

7. Applications: Common applications for the SMBJ30A include ESD protection, surge protection in power supplies, and safeguarding sensitive components in automotive and industrial electronics.

Electrical Characteristics:

• Reverse Stand-off Voltage (V_R): 30V
• Clamping Voltage (V_C): Typically around 45V at a specified peak pulse current.
• Peak Pulse Power (P_PP): 600W (for a 10/1000μs waveform).
• Capacitance: The device has a low capacitance value, which helps maintain signal integrity in high-speed applications.

Conclusion:

The SMBJ30A 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 excellent choice for a wide range of applications where overvoltage protection is necessary.