SA43HE3/73

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Transient voltage surge suppressors (TVS) have become a very important component in protecting against high voltage pulses in a wide range of electronic circuits. The SA43HE3/73 is a transient voltage suppressor diode that can be used to suppress voltage spikes in a wide variety of electronic products, ranging from personal computers and audio equipment to telecommunications equipment. In this article, we will discuss the application field and working principle of the SA43HE3/73.

The SA43HE3/73 is specially designed for the protection of low voltage circuits. It consists of three series-connected zener diodes in a standard SMA package. The maximum working voltage is 43V, with a maximum clamping voltage of 73V. It has a fast response time of 50ns and can withstand peak surge currents of 8A.

The SA43HE3/73 can be used to protect a wide range of electronic circuits from static electricity discharges, lightning strikes, power supply fluctuations and short-term power outages. In particular, it is an ideal choice for protecting small battery-powered circuits due to its low power consumption and high clamping voltage. It can also be used for surge protection of sensitive microcontroller circuits. The SA43HE3/73 is also well suited for protecting single-ended, low voltage audio circuits from induced ground noise.

The working principle of the SA43HE3/73 diode is very simple. When it is connected in series with the circuit, it acts as a short circuit across the circuit, effectively diverting any high voltage pulses that would otherwise pass through the circuit. The diode itself is designed to allow the normal operation of the circuit while suppressing any large voltage spikes. In other words, it acts as a "safety valve", allowing the normal operation of the circuit while protecting it from any excessive levels of voltage.

In conclusion, the SA43HE3/73 diode is a very useful and versatile component for a variety of electronic circuits. Its high clamping voltage, fast response time, and low power consumption make it an ideal choice for protecting small battery-powered circuits from static electricity discharges, lightning strikes, and other transient events. Its simple working principle allows it to act as a short circuit across the circuit, diverting any excessive voltage spikes away from the sensitive components. This makes it an excellent choice for surge protection of sensitive microcontroller circuits, power supply fluctuations, and single-ended, low voltage audio circuits.

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