SA7.5CA

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TVS (Transient Voltage Suppression) diodes are a type of semiconductor device used to protect circuits from voltage surges, static discharges and inductive transients. They act as gatekeepers to conduct high voltage or energy away from the sensitive components of a circuit, helping to protect from electrical overstress.

SA7.5CA is a type of TVS diode from Siemens, designed to protect sensitive circuits against electrostatic discharge, voltage transients, and inductive switching. It is mainly used in the automotive industry as it meets the standards requirements for motor vehicles.

The SA7.5CA has a diameter of 7.5mm and uses Axial lead technology. It is encapsulated in a thermally robust epoxy case that not only provides additional insulation for higher breakdown and surge capability, but also protects it from mechanical damage and the environment.

Most TVS diodes work on the principle of avalanche breakdown. This occurs when the applied voltage across the junction of a material exceeds a sharply defined breakdown voltage specific to the material. When the voltage exceeds the breakdown voltage, electrons traveling from the anode to the cathode experience an acceleration so great that they release further electrons, creating an avalanche effect.

This discharge allows electricity to flow along an ionized channel, thereby protecting the device from the source of the overload. As a result, the diode can then suppress current up to a certain level, and re-establish normal operating conditions when the overload has passed.

The SA7.5CA has a 1.5kW surge capability and a breakdown voltage of 6.3V, making it ideal for many automotive applications. It also benefits from a low leakage current of 20nA and a low capacitance of 10pF, providing on-state protection from surges of up to 1.5kW.

The SA7.5CA is also able to provide a wide range of protection from electrostatic discharges (ESD) of up to 8kV (HBM), making it perfect for use in applications such as automotive seat controls, electronic door locks, and immobilizer systems.

The SA7.5CA is a versatile TVS diode that is suitable for many applications. Its small size, low capacitance and wide surge capability make it a popular choice for automotive applications, where it is able to protect sensitive components from voltage transients, static discharges, and inductive transients.

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