B72540V0250K062 Circuit Protection

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Varistors, also called VDRs (voltage dependent resistors) or MOVs (metal oxide varistors), are specially designed semiconductor components that provide protection against transient voltage surges, high power line spikes and electrostatic discharges (ESD). The B72540V0250K062 is a metal-oxide-varistor (MOV) rated at 250V. It is designed to protect against overvoltages and to limit the surge current.

Applications

The B72540V0250K062 is often used in consumer electronics, automotive electronics, telecommunications and industrial electronics. It offers protection from overvoltage and electrostatic discharge (ESD) events in LED lighting systems, home automation, home appliances, wet locations, and industrial automation systems. It can also be used in AC power supplies, line frequency filters, power factor controllers, and switched mode power supplies. Additionally, it can provide protection from line frequency interference to keep data transmission details secure.

Working principle

Varistors are non-linear, voltage dependent resistors whose electrical resistance changes depending on the applied voltage. The B72540V0250K062 is composed of a zinc oxide material, sandwiched between two electrodes. When the applied voltage is lower than the breakover voltage of the device, the resistance is extremely high. However, when the applied voltage increases beyond the breakover voltage, the resistance value falls exponentially, allowing a large current to flow. This current is then dissipated as heat, which protects the component from the surge or spike.

The B72540V0250K062 has a breakover voltage of 250V and a response time of 5µs. It also has an energy of 750J, a capacitance of 1100pF, and a peak current of 90A. Its low capacitance makes it ideal for use in high-speed electronics, such as computers and communications equipment. It can also be used in low-voltage applications, such as consumer electronics.

Conclusion

The B72540V0250K062 is a reliable and cost-effective varistor designed to provide protection against transient voltage surges, high power line spikes, and electrostatic discharges (ESD) events. Its low capacitance and fast response time make it ideal for use in high-speed electronics and low-voltage applications. It is an popular choice for protecting consumer electronics, automotive electronics, telecommunications and industrial electronics.

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