V661HF34

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The V661HF34 is a varistor, also known as a voltage-dependent resistor (VDR), a transient voltage surge suppressor (TVSS), or a transient voltage suppression (TVS) device. In general, a varistor is a passive two-terminal electronic component which has an electrical resistance that is dependent on voltage and is used primarily to protect circuits from too much voltage. The V661HF34 is a radial-leaded 630V, 7mm TVS Varistor with a 34Ω surge impedance. The device is used to protect sensitive electronic components and lines from overvoltage caused by electrical transients on power, signal and data lines.

Working Principle

Varistors operate on a simple principle. They rely on the principle of charge neutrality, which states that the total amount of positive and negative charge in a circuit must be equal. This principle is exploited by varistors to suppress a voltage surge. When a voltage surge or transient occurs, the amount of charge that flows through the varistor increases. This increase in charge makes the varistor’s resistance increase, effectively limiting the current flow and protecting the circuit. The varistor limits the voltage to the safe levels for the circuit and thereby protects it.

Application Field

The V661HF34 is used to protect voltage and signal lines in applications such as appliances, telecommunications, computers, consumer products, automotive systems, industrial systems, and medical devices. It can be used for suppressing ESD, surge, and overvoltage on the power, signal, and data lines. It can also be used to protect components from reverse polarity, power cross, short pulses, and other voltage transients.

The V661HF34 is an ideal choice for protecting circuits from voltage transients. It offers high surge current capability, compact size, low assembly costs, and long term reliability. As such, it is widely used in applications where high surge current capability is required and where long term reliability is a must.

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