SMBJ70A-E3/52

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TVS diodes are a type of an electronic component that are used to protect voltage-sensitive electronic circuitry from overvoltage conditions. The SMBJ70A-E3/52 is a diode made specifically for protecting electrical equipment against voltage spikes. In order to better understand how this diode works, we must first take a look at its application field and working principle.

Application Field

The SMBJ70A-E3/52 is designed to protect voltage-sensitive electronics against lightning and electrostatic discharge (ESD). This diode has a working voltage of 70 volts and a peak pulse power rating of 1.5 kW. It can handle high-energy spikes of up to 17A, making it ideal for use in industrial and medical electrical equipment.

The SMBJ70A-E3/52 is also designed for low-capacitance, high-speed transient voltage suppression. This means that it is well suited to protecting electronic circuitry from damaging EMI, noise, and other transients. Its capability to dissipate high-energy voltages quickly also make it suitable for use in automotive and telecom applications.

Working Principle

TVS diodes such as the SMBJ70A-E3/52 are designed with a reverse-biased silicon junction. This junction has a voltage breakdown point that is greater than the operating voltage of the diode. When an overvoltage condition is present, the diode conducts, diverting the excess current away from the circuit.

The SMBJ70A-E3/52 uses a more specialized breakdown mechanism. Its junction is designed to be thermally self-regulating. This means that it is able to dissipate the high-energy spike through its own heating mechanism, which protects it from damage and ensures a steady working voltage.

The diode also uses a high-speed reaction time to suppress voltage spikes. Its fast reaction time ensures that voltage transients are suppressed before they have a chance to damage the circuit. This makes it ideal for applications where fast response time is needed to protect sensitive electronics.

Conclusion

The SMBJ70A-E3/52 is a specialized Diode designed for protecting voltage-sensitive electronics from lightning strikes and ESD. Its thermally self-regulating junction and fast response time make it ideal for use in industrial, medical, automotive, and telecom applications. This makes it a valuable component for any circuit that needs reliable protection from severe overvoltage conditions.

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