B72510E0350K062

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TVS (Transient Voltage Suppressors), MOVs (Metal Oxide Varistors) and B72510E0350K062 are all passive electronic components for circuit protection, each with its own advantages and disadvantages. Although they work differently, they are all intended to protect electronics against transient voltages. This article aims to explain the application field and working principle of B72510E0350K062.

Application Field

The B72510E0350K062 is a general purpose metal oxide varistor with an operational voltage range from 8 to 15 VDC. It is mainly used for protection against circuit surges and spikes induced by electrostatic discharges, power switching transients and other related events. It is suitable for applications in home and office electronics, such as computers, power strips, power adapters, USB hubs, surge protectors and other consumer electronics. It also has the advantage of high surge capacity and low energy absorption, making it suitable for sensitive equipment. In addition, its low clamping voltage ensures that sensitive components in a circuit are protected from overvoltage.

Working Principle

Metal Oxide Varistor (MOV) is a special type of voltage-dependent resistor, usually composed of Zinc Oxide grains with a conductive metal on the surface. Under normal conditions, the MOV acts as an insulator, allowing only minimal current to flow through the device. When the voltage at the device exceeds the pre-defined threshold (called "breakdown voltage"), the device will rapidly conduct current through it, preventing further rise of voltage at the device. This causes a sudden change in resistance at the device, leading to a rapid reduction in voltage, thus protecting the circuit from further damage.

In the B72510E0350K062, the varistor element is composed of a disc-like ceramic body containing zinc oxide grains. The central metal on the ceramic body acts as the contact area for electrical connections. The contacts on either side of the MOV can either be soldered directly or connected via a plug. Internally, the device is optimized for low inductance and low capacitance, making it more suitable for high-speed transients and overvoltage protection.

In order to provide circuit protection, the B72510E0350K062 must be connected in a series with the load, forming a protective circuit. The load connects to the MOV via an alternating voltage source, such as AC power or a signal line. During normal conditions, the MOV is an open circuit, acting as an insulating barrier to current flow. If a voltage transient occurs that exceeds the breakdown voltage of the MOV, the device will suddenly conduct current and clamp the voltage at the load quickly and effectively.

Conclusion

The B72510E0350K062 is a general purpose Metal Oxide Varistor with an operational voltage range from 8 to 15 VDC. It is mainly used for protection against overvoltages and power switching transients in home and office electronics. The MOV element of the device is composed of a ceramic body containing zinc oxide grains, with a central metal as contact area. Internally, the device is optimized for low inductance and capacitance, making it more suitable for high-speed transients. In order to provide protection against overvoltage and power switching transients, the MOV must be connected in series with a load, where it acts as an insulating barrier until the voltage transient exceeds the MOV’s breakdown voltage, at which point it will reduce the voltage at the load quickly and effectively.

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