SMBJ64A

The SMBJ64A 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 SMBJ64A has a breakdown voltage of approximately 64 volts, making it suitable for clamping voltage spikes that exceed this threshold. It is designed to handle transient voltages effectively while allowing normal operating voltages to pass through without interference.

2. Power Dissipation: The device can handle a peak power dissipation of up to 600 watts for a short duration, which is essential for absorbing high-energy transients without failing.

3. Package Type: The SMBJ64A is housed in a DO-214AA (SMB) package, which is a surface-mount device (SMD) that provides a compact footprint. This makes it ideal for space-constrained applications while ensuring efficient thermal management.

4. Response Time: The response time of the SMBJ64A is extremely fast, typically in the nanosecond range, allowing it to react quickly to voltage spikes and protect downstream components.

5. Clamping Voltage: The clamping voltage is specified at a certain peak pulse current, ensuring that the device will limit the voltage to a safe level during transient events.

6. Operating Temperature Range: The SMBJ64A operates effectively over a wide temperature range, typically from -55°C to +150°C, making it suitable for various environmental conditions.

7. Low Leakage Current: The device features low leakage current under normal operating conditions, which helps in maintaining the efficiency of the circuit it protects.

8. Applications: Common applications for the SMBJ64A include ESD protection, surge protection in power lines, and safeguarding sensitive components in automotive and industrial electronics.

Electrical Characteristics:

• Reverse Stand-off Voltage (V_R): 64V
• Breakdown Voltage (V_BR): Typically around 71V
• Clamping Voltage (V_C): Specified at a given peak pulse current
• Peak Pulse Power (P_PP): 600W (for 8/20μs waveform)
• Capacitance: Low capacitance values, ensuring minimal impact on signal integrity.

Conclusion:

The SMBJ64A from Littelfuse Inc. is a robust and reliable solution for transient voltage suppression, providing essential protection for electronic circuits against voltage spikes. Its compact design, high power handling capability, and fast response time make it an excellent choice for a wide range of applications in modern electronic systems.