SA18-E3/73

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TVS – Diodes are an important and popular device for protecting complex electronic circuits from overvoltage and transients. The SA18-E3/73 TVS – Diode is a unidirectional, overvoltage protection device that is designed to protect sensitive components from voltage transients caused by lightning or other events. This diode has an operational voltage rating of 18V and an inrush current rating of 73A.

The primary application of the SA18-E3/73 TVS – Diode is for inrush current protection. When an electronic circuit is overloaded, a surge of current can flow through it and cause damage to its components. By inserting the diode in series with the circuit, the current surge is diverted and greatly reduced before it can cause any damage. This helps keep the circuit components safe from any voltage transients.

The working principle of the SA18-E3/73 TVS – Diode is to use an avalanche and zener combination to control the voltage across the diode. When the voltage across the diode is below its breakdown voltage (18V) it will remain in its zener state and have an almost zero voltage drop. When the voltage across the diode exceeds its breakdown voltage, the avalanche effect takes over and the diode will begin to conduct current, diverting it away from the circuit.

The diode can also be used to protect other components in a circuit from overvoltage. When the voltage across the diode reaches its breakdown voltage, the diode will begin to conduct current, thus preventing any further voltage from entering the circuit. This allows the other components to remain safely protected.

The SA18-E3/73 TVS – Diode can be further enhanced by the use of surge arrestors and lightning arrestors. The surge arrestor is used to protect the diode from overvoltage produced by inductive loads such as motors. The lightning arrestor provides protection from overvoltage strikes, such as those caused by lightning. Both of these devices help to ensure that the components of a circuit are protected from overvoltage and voltage transients.

The SA18-E3/73 TVS – Diode is a highly reliable and cost effective way to protect electronic circuits from overvoltage and voltage transients. Its unidirectional characteristics and avalanche and zener combination make it ideal for a variety of applications. This diode is suitable for applications that require low upfront cost and high reliability.

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