SA28A B0G Circuit Protection

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SA28A B0G application field and working principle

A SA28A BOg, or Bidirectional Overvoltage Gas Discharge Tube, is a component commonly used in TVS (transient voltage suppression) applications. This type of component serves the purpose of protecting sensitive electronic circuits and components from the effects of transient voltages and currents. Transient voltages and currents can be caused by various sources such as lightning strikes, power surges, switching of loads, and electromagnetic interference. By absorbing transient energy, a TVS diode can help prevent these unwanted events ffrom damaging sensitive electrical components. This article will explore the applications and the working principle of the SA28A B0G.

Applications of the SA28A B0G

The SA28A B0G is a popular choice in many TVS applications due to its dual voltage protection capabilities. It is efficient at absorbing both low and high transient voltages and currents, and its low-inductance construction ensures a fast response time. This component is also designed to be bidirectional, which means it can protect circuits from voltages and currents coming from either direction. This makes it an ideal device for applications that require protection from both AC and DC voltages. Common applications of the SA28A B0G include protecting AC/DC power supplies, telecommunications equipment, and automotive electronics.

Working Principle and Construction

The SA28A B0G is composed of two cylindrical electrodes inside of a sealed glass tube filled with a special gas. When the tube is exposed to a high transient voltage, the gas between the two electrodes begins to ionize and form a conducting channel. This channel acts as a short circuit and dissipates the energy of the transient voltage. Once the transient voltage is removed, the gas between the electrodes returns to its non-conducting state. The SA28A B0G is designed to be bidirectional, which means it can protect against both positive and negative voltages. This makes it well suited for applications that require dual voltage protection.

In terms of its physical construction, the two electrodes of the SA28A B0G are usually made of nickel plated copper alloy and the glass tube is filled with a special gas. The SA28A B0G is designed to be compatible with most TVS surge protectors, so it can be used in combination with other devices. It is also relatively small in size, making it an ideal choice for a variety of applications.

Conclusion

The SA28A B0G is a popular choice for many transient voltage suppression applications due to its dual voltage protection capabilities and its fast response time. It is composed of two electrodes inside of a sealed glass tube filled with a special gas, and its bidirectional design allows it to protect circuits from both positive and negative voltages. This makes it an ideal choice for applications such as AC/DC power supplies, telecommunications equipment, and automotive electronics.

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