SA85C

TVS diodes (or transient voltage suppressors) are an important type of protection component, used in electronic circuits to protect them against transient voltage spikes.The SA85C is a type of surge arrestor (TVS) diode, made by Diodes Inc., and is widely used in electronic applications. This article will discuss the application fields and working principles of the SA85C.

The SA85C is a bidirectional TVS diode, meaning it is capable of handling both positive and negative transient voltages. It is designed to withstand up to 85 volts of surge/transient voltage, while handling forward or reverse voltage up to 27 volts. In addition, the SA85C has an operating temperature range of -55 degrees Celsius to 125 degrees Celsius. This wide temperature range allows the diode to be used in a variety of industrial and consumer applications.

In terms of applications, the SA85C can be used to protect circuit components from transient voltage spikes, often caused by electromagnetic interference. It is commonly found in automotive electronics, medical devices, LED lighting, computer circuits, and telecommunications equipment, to name a few.

The SA85C is also commonly used in signal line applications. Specifically, it is often used to protect signal lines such as serial data lines. It prevents the signal line from overvoltage, that is, it prevents signal levels from getting too high, while also preventing them from going too low. As a result, it helps protect the signal line from voltage spikes and static discharge.

In terms of its working principle, the SA85C operates in two stages. When the transient voltage is applied, the internal structure of the diode is able to absorb, or “clamp”, the surge voltage. This helps to reduce the overvoltage and protect the circuit. The diode then begins to conduct, allowing current to pass through it. This allows the transient energy to be dissipated, helping to protect the circuit from overvoltage.

In summary, the SA85C is a bidirectional surge protection diode manufactured by Diodes Inc. It is designed to operate in a wide range of temperatures and can be used to protect circuits from surges caused by Electro-Magnetic Interference. Additionally, it is commonly used in signal line protection applications. Its working principle is twofold: it “clamps” the surge voltage and dissipates the energy into the circuit, helping to prevent overvoltage while protecting the circuit.