SMBJ300CA

The SMBJ300CA 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 SMBJ300CA has a breakdown voltage of approximately 300 volts, making it suitable for high-voltage applications. It is designed to clamp voltage spikes effectively, ensuring that the voltage does not exceed the safe operating limits of connected components.

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 protecting circuits from lightning strikes, inductive load switching, and other high-energy transients.

3. Package Type: The SMBJ300CA 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 modern electronic designs where space is at a premium.

4. Response Time: The TVS diode features a fast response time, typically in the nanosecond range, allowing it to react quickly to transient events. This rapid response is crucial for minimizing the risk of damage to sensitive components.

5. Temperature Range: The operating temperature range for the SMBJ300CA is typically from -55°C to +150°C, making it suitable for a wide variety of environmental conditions, including harsh industrial and automotive applications.

6. Low Leakage Current: The device exhibits low leakage current under normal operating conditions, which helps to maintain the efficiency of the circuit and reduces power loss.

7. Applications: The SMBJ300CA is commonly used in applications such as:

   • Overvoltage protection for power supplies
   • Protection for data lines in communication equipment
   • Automotive electronics, including control modules and sensors
   • Consumer electronics, such as televisions and computers

Electrical Characteristics:

• Reverse Stand-off Voltage (V_R): 300V
• Clamping Voltage (V_C): Typically around 400V at a specified peak pulse current
• Peak Pulse Power (P_PP): 600W (for 10/1000μs waveform)
• Capacitance: Low capacitance values, ensuring minimal impact on signal integrity in high-speed applications.

Conclusion:

The SMBJ300CA from Littelfuse Inc. is a robust and reliable transient voltage suppressor that provides essential protection for electronic circuits against voltage transients. Its high power handling capability, fast response time, and compact package make it an ideal choice for a wide range of applications where overvoltage protection is necessary.