SA7.5C-E3/54

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TVS - Diodes are widely used in the field of electronic circuits, this chapter will focus on the application field and working principle of a typical TVS -Diodes, SA7.5C-E3/54.

The SA7.5C-E3/54 TVS-Diode is especially designed for surge current protection in automotive electronic systems, which can provides enlarged surge capability when the voltage transient is between 7.5V to 54V. This diode can protect all kinds of switching devices, such as transistors, FET and IGBT, from high-energy voltage transients resulted by load dump. In addition, it also protects the parts connected with the alternative connection from the impact chain.

The SA7.5C-E3/54 TVS-Diode can also be used for the protection of automotive circuits, control circuits, as well as the protection of the in-vehicle communication line, which ensures that the electric system to be stable and reliable. It shows that this diode can effectively suppress the high surge voltage, protect the circuit from ESD, EFT and lightning transients generated on the supply line and data line.

SA7.5C-E3/54 TVS Diode’s working principle is sharing a similarity with the Zener diode. This diode has a voltage breakdown point which can avoid an extraordinary current when the system encounters electromagnetic interference or voltage peak. When an extraordinary surge current happens, the diode is in the conductive state, the voltage driving force is not enough to keep the diode in forward biased, thus the Zener diode conducts and the voltage across it is limited.

Moreover, this diode has extra low inductance between the anode and cathode terminal, providing a low impedance path of the high frequency surge current. In the non-conductive state, there is a small leakage current flowing across the diode, which can be usually ignored. On the other hand, the SA7.5C-E3/54 TVS Diode also has a lower dynamic resistance to reduce the voltage drop when a large current passing through it.

In summary, the SA7.5C-E3/54 TVS-Diode provides superior surge-protection performance with high peak pulse power and clamping voltage which meets the requirements of automotive applications. This diode also offers the low dynamic resistance and low capacitance for excellent protection from new, higher voltage transients. All these features make the SA7.5C-E3/54 TVS-Diode a powerful and reliable protector for automotive electronic systems.

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