B72214S0250K551

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The B72214S0250K551 is part of the Transient Voltage Suppressor (TVS) series from EPCOS. TVS devices are used to protect equipment from damage caused by electrostatic discharge, lightning, or other high voltage electrical transients. The B72214S0250K551 is a varistor, also known as a voltage dependant resistor (VDR). It is a device that exhibits electrical breakdown characteristics that vary depending on the applied voltage. Varistors are used to absorb excess voltage in order to protect the equipment they are connected to.

This particular TVS device has a rated voltage of 500V and a maximum peak pulse voltage of 5 largest pulses 1000V. It has a capacitance of 250pF and a dielectric strength of 2150V. The B72214S0250K551 also has a rated current of 1.25A and a surge current of 5.10A. The device is rated for 125 rounds of the surge current. It has a radial diameter of 5.6mm and a height of 4.3mm.

The B72214S0250K551 is designed to be used in equipment such as LED displays, consumer electronics, and telecommunication applications. It works by absorbing excessive voltage and quickly discharging it into the ground. This is done by the TVS device instantly responding to a voltage spike and reducing it to a safe level. This helps to protect the circuit or device by preventing the voltage from reaching a level where the components become damaged.

The working principle of the device can be broken down into two main stages. Firstly, the varistor acts as a type of current-limiter. This means that if the applied voltage exceeds the specified voltage rating, the varistor will draw an excessive current and dissipate the energy into the air.

Secondly, the device acts as a voltage clamp. This is where the varistor is designed to remain non-conductive until the applied voltage reaches a certain threshold. In the case of the B72214S0250K551, this is the maximum peak pulse voltage of 1000V. When this threshold is reached, the varistor rapidly transfers the energy to the ground, effectively limiting or clamping the voltage.

In conclusion, the B72214S0250K551 is an example of a Transient Voltage Suppressor (TVS) designed to protect equipment from dangerous electric transients. It is a varistor that works by quickly reducing a sudden spike in voltage to a safe level. The device is often used in LED displays, consumer electronics, and telecommunication applications. Thanks to its current-limiting and voltage-clamping mechanisms, it is able to protect the connected device from damage caused by voltage spikes.

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