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SA85CA A0G TVS-Diodes Application Field and Working Principle

Surge Arrester SA85CA A0G is a Transient Voltage Suppression (TVS) diode that has multiple applications. TVS diodes are commonly used in electronic applications such as automotive, telecommunication, consumer electronic, and industrial applications for protecting devices from voltage transients and other overvoltage threats. As a surge arrester SA85CA A0G particularly serves as an ESD protection diode in automotive, industrial, data communication, and mobile communication equipment applications.

SA85CA A0G TVS-diodes have two common structures; Unidirectional (uni-directional) structures and Bidirectional (Bi-directional) structures. The unidirectional structures usually have an easy-to-identify Anode and Cathode leads, whereas the Bi-directional structures have two Cathode leads and one Anode lead. Both Unidirectional and Bidirectional SA85CA A0G TVS diode structures have a breakdown voltage of 15V, with a 5.7KV peak pulse capability.

Unidirectional SA85CA A0G TVS-Diodes

Unidirectional SA85CA A0G TVS-diodes are commonly used for ESD and other transient protection of electronic devices. The Anode and Cathode leads on the diodes are labeled to identify the correct terminal connections on the circuit. When there is a surge of voltage greater than the breakdown voltage of SA85CA A0G, the diode begins to conduct, and the excess voltage is diverted away from the protected device. The Unidirectional TVS-diode will act like a short to reduce the magnitude of the surge until it is absorbed by the diode. The absorbed energy is dissipated in the form of heat generated in the diode.

Bidirectional SA85CA A0G TVS-Diodes

Bidirectional SA85CA A0G TVS-diodes have two Cathode leads and one Anode lead, and are commonly used for ESD and other transient protection of electronic devices. The two Cathode leads are labeled to identify the correct terminal connections on the circuit. When there is a surge of voltage greater than the breakdown voltage of the diode, the diode begins to conduct, diverting the excess voltage away from the protected device. The two Cathode leads are in parallel, thus conducting current in both directions, and the Anode lead is the only terminal connection that is negative. The Bidirectional TVS-diode will act like a short to reduce the magnitude of the surge until it is absorbed by the diode. The absorbed energy is dissipated in the form of heat generated in the diode.

Conclusion

SA85CA A0G TVS-diodes are an important component in electronic circuits to protect them from transient voltage surges. They are available in Unidirectional and Bidirectional structures, both of which have a breakdown voltage of 15V with a 5.7KV peak pulse capability. Unidirectional TVS-diodes have Anode and Cathode leads labeled to identify the correct terminal connections, and Bidirectional TVS-diodes have two Cathode leads and one Anode lead. The diode begins to conduct and divert the excess voltage away from the protected device when a surge of voltage greater than the breakdown voltage of the diode is detected. The absorbed energy is dissipated in the form of heat generated in the diode.

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