SMBJ43CA

The SMBJ43CA is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. It is designed to protect sensitive electronic components from voltage spikes and transients, such as those caused by electrostatic discharge (ESD) or lightning strikes.

Key Features:

1. Voltage Rating: The SMBJ43CA has a breakdown voltage of approximately 43 volts, making it suitable for applications that require clamping at this voltage level.

2. Power Dissipation: This device can handle a peak power dissipation of up to 600 watts, which allows it to absorb significant energy from transient events without failing.

3. Package Type: The SMBJ43CA is housed in a DO-214AA (SMB) package, which is a surface-mount device (SMD) that is compact and suitable for automated assembly processes. The package dimensions typically measure around 5.2 mm x 6.5 mm, with a height of about 2.5 mm.

4. Clamping Voltage: The clamping voltage is specified at a certain peak pulse current, ensuring that the voltage across the device remains within safe limits during transient events. This is crucial for protecting downstream components.

5. Response Time: The SMBJ43CA features a fast response time, which is essential for effectively clamping voltage spikes before they can damage sensitive circuitry.

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

7. Applications: Common applications for the SMBJ43CA include telecommunications, automotive electronics, consumer electronics, and industrial equipment, where protection from voltage transients is critical.

8. RoHS Compliance: The SMBJ43CA is compliant with RoHS (Restriction of Hazardous Substances) regulations, ensuring that it is free from certain hazardous materials, which is important for environmentally conscious manufacturing.

Electrical Characteristics:

• Reverse Stand-Off Voltage (V_R): 43V
• Breakdown Voltage (V_BR): Typically around 48V
• Clamping Voltage (V_C): Specified at a given peak pulse current
• Peak Pulse Power (P_PP): 600W (for 8/20 µs waveform)
• Capacitance: Low capacitance values, typically in the range of a few picofarads, which helps maintain signal integrity in high-speed applications.

Conclusion:

The SMBJ43CA from Littelfuse Inc. is a robust and reliable transient voltage suppressor that provides essential protection for electronic circuits against voltage spikes. Its combination of high power handling, fast response time, and compact packaging makes it an ideal choice for a wide range of applications in modern electronic devices.