SMBJ5.0A

Recommended SMBJ Model: For 5V systems, the SMBJ5.0A (or SMBJ5.0CA for bidirectional protection) is a suitable choice.

Key Parameters of SMBJ5.0A:

  • Reverse Stand-off Voltage (š‘‰š‘…š‘Šš‘€Vā€‹ ): 5.0V
  • Breakdown Voltage: 6.40V to 7.07V
  • Clamping Voltage: 9.2V (this is the maximum voltage the TVS diode will clamp to during a surge)
  • Peak Pulse Current: Can handle high current surges (typically in the range of 43.5A).

Why Choose SMBJ5.0A:

  • It has a reverse standoff voltage of 5V, meaning it will not conduct under normal operating conditions of your 5V system.
  • It will clamp the voltage to 9.2V during overvoltage events, protecting your circuit from damage.
  • If your system is exposed to electrostatic discharge (ESD) or power surges, this diode will absorb the excess energy.
  • Alternative:
  • If you need bidirectional protection (e.g., for AC signals or where polarity can reverse), the SMBJ5.0CA (the bidirectional version) offers the same protection levels but in both polarities.

Conclusion:

  • For protecting a 5V voltage line, SMBJ5.0A (unidirectional) or SMBJ5.0CA (bidirectional) would be the best choice, ensuring your 5V system is safeguarded from voltage spikes and surges.

  • SMA: DO-214AC

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