SM30T30CAY Circuit Protection

The SM30T30CAY is a transient voltage suppression (TVS) diode commonly used in automotive, industrial, and telecommunication applications. The device is designed to protect circuits from interference caused by electrical transients such as electrostatic discharges, load dump, and lightning. This device is largely suitable for use in safety critical applications, such as those related to automotive power networks.

General Characteristics

The SM30T30CAY is a bidirectional, unidirectional, and dual-watt transient voltage suppressor (TVS) diode 17.8 mm wide and 28.6 mm tall. It is an SMB package type, which means that the leads come up from the bottom of the device. The lead configuration is 4 leads, 1, 2, and 10 on the bottom and 8 on the top. The junction to case thermal resistance is 1.3 C/W in a typical application. The diode has a working voltage of 30V and a maximum dissipation power rating of 5 watts. The device is available in a variety of packages and voltages as well as an extended version.

Application Field

The SM30T30CAY is used in a variety of automotive, industrial, and telecommunication applications to protect circuits from interference caused by electrical transients. It can be used in automotive power networks, electronic control systems, electronic circuit power supplies, and more. The device is suitable for safety critical applications, such as audio lines in automotive systems. Additionally, the device offers improved surge failure performance, making it ideal for protecting automobiles from surge interference.

Working Principle

The SM30T30CAY is a bidirectional and unidirectional TVS diode. The diode is designed to protect circuits from interference caused by electrical transients by diverting the voltage to ground. The device works by absorbing and clamping the voltage from the transient surge to protect the circuit from further damage. When a transient surge occurs, the diode is triggered and the voltage is diverted to ground, which limits the surge and repels the current. The device is designed to begin clamping at a lower voltage than a normal diode, allowing it to offer better protection against surges.

Conclusion

The SM30T30CAY is a transient voltage suppression (TVS) diode used to protect a wide variety of circuits from interference caused by electrical transients. The device has a working voltage of 30V and a maximum dissipation power rating of 5 watts, making it suitable for use in safety critical applications. Additionally, the diode is designed to clamp the voltage at a lower voltage than a normal diode, providing better protection against surges.