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TVS - Diodes

The SMBJ70CA-TR is one of the three Uni-Directional Transient Voltage Suppressors (TVS) produced by ON Semiconductor. The others in the series are the SMBJ7.0CA-TR, as well as the SMBJ10CA-TR. All three of these diodes are 30 watt at 1ms highly efficient Zener diodes.

The SMBJ70CA-TR is a TVS diode that is most commonly used when attempting to protect a circuit from electrical overstress (EOS), which can damage, ruin, or destroy system operation. The SMBJ70CA-TR is typically implemented as a safeguard for solid state equipment, such as microcontrollers and other digital circuits.

Application Field

The primary application field for the SMBJ70CA-TR is Microcontroller Circuit Protection. This diode is mainly used for transient voltage suppression (TVS) in sensitive electronic circuits. It is designed to absorb the high-energy surge pulses in low- and medium-voltage applications with up to 30 watts of power handling capability.

The SMBJ70CA-TR can also be used in RF switching applications to reduce RF noise. In addition, it is also used in power supplies, LCD and LED displays, as well as gapped lighting applications.

Working Principle

The working principle of the SMBJ70CA-TR involves the process of clamping transients within the breakdown region of the diode. The SMBJ70CA-TR will have a breakdown voltage of 63V which is able to absorb the energy required to protect the circuit from electrical overstress. When a positive surge is applied to the diode, the diode will start conducting current to the diode in the breakdown region. This will cause the voltage across the diode to increase as it absorbs the energy of the positive potential. When the voltage across the diode increases to its breakdown voltage, the diode will start to clamp the current passing through it and as a result, the voltage of the diode will start to decrease until it reaches its initial state (in its non-switched state).

This process is usually used in transient voltage suppression applications, as it allows the diode to absorb the excess energy of a transient voltage without having to damage the circuit that it is protecting. The SMBJ70CA-TR is the perfect solution for protecting sensitive equipment as it can quickly and efficiently absorb the energy of high voltage transients.

Conclusion

The SMBJ70CA-TR is an excellent choice for protecting sensitive equipment from voltage transients. It is designed for use in low- and medium-voltage applications with up to 30 watts of power handling capability. It is also suitable for use in RF switching applications to reduce RF noise. Additionally, it can be used in power supplies, LCD and LED displays and different gapped lighting applications.

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