V420LC7P

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Varistors, also known as voltage-dependent resistors (VDRs), are one of the main types of surge suppressors used in electrical systems. They are designed to protect against electrical overvoltages, most commonly caused by lightning strikes and transient AC power disturbances. The V420LC7P is a metal-oxide varistor with a surge current rating of 600A 8/20μs and a voltage rating of 420VAC. The V420LC7P is widely used in power supplies and data line suppression applications due to its low capacitance, low leakage current, and low clamping voltage characteristics.

A varistor is a nonlinear resistor with a voltage-dependent resistance. When an overvoltage occurs, the varistor diverts the current away from the protected circuit, acting as a short-circuit until the voltage is reduced. The varistor’s resistance increases as the voltage decreases, limiting the current and protecting the circuits. Different types of varistors have different characteristics, which determine the best applications for each. The V420LC7P is a non-polarized Metal-Oxide Varistor (MOV), with a low operating voltage of 420VAC and a very low capacitance of 10pF, making it ideal for protecting sensitive circuits from overvoltages.

The V420LC7P’s surge current rating of 600A 8/20μs is what makes it suitable for power supply and data line applications. This rating is based on an 8/20μs waveform, which is a standard measure of a device’s surge current capability. The 8/20μs waveform is a short-duration, high-current pulse composed of an 8μs rise time and a 20μs decay time. The 8μs rise time represents “opening” the varistor up to accept a fast rising voltage while the 20μs decay time represents “closing” the varistor when the voltage has peaked.

The V420LC7P’s low clamping voltage characteristics allow it to easily protect circuits from overvoltages. Its low leakage current characteristics allow it to maintain a relatively low-resistance connection and provide protection from ground loops and other abnormally high currents. The low capacitance of the V420LC7P makes it ideal for use in data line suppression applications because it allows for fast, accurate, and reliable data transfer without interference from outside sources.

The V420LC7P is also highly resistant to thermal and mechanical shock and vibration, making it suitable for use in harsh environments. Its low temperature coefficient provides reliable performance over a wide temperature range. The device is also designed with built-in thermally activated over-temperature protection and under-temperature lockout, providing additional protection against extreme temperatures.

The V420LC7P is a versatile surge suppressor that can be used in a variety of applications, including power supply and data line suppression. Its high surge current rating, low clamping voltage, low capacitance, and low leakage current make it an ideal choice for protecting sensitive circuits from overvoltages. Itshigh resistance to thermal and mechanical shock and vibration also make it suitable for use in harsh environments. By combining all of these features the V420LC7P is an excellent choice for surge protection in a variety of applications.

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