VK103MK151R025P050

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Transient Voltage Suppressors (TVS) such as Surge Protective Devices (SPDs) or Varistors, are protective components used to suppress or limit the amplitude of transient voltage or transient current surges on a power line or other electrical circuit. They can be used to protect circuits from overvoltage, overcurrent or both. The VK103MK151R025P050 is a Varistor, a well-known form of TVS.

Application Field

The VK103MK151R025P050 is a Varistor which is used for various circuit protection applications in electronics. It is commonly used to protect circuits from overvoltage and surge protection against high voltage and current transients. It is designed for use in AC power supplies, DC-DC converters, low voltage DC circuits and data bus protection in industrial, consumer and automotive applications.

Working Principle

The VK103MK151R025P050 Varistor is based on multilayer metal oxide semiconductor technology and works by using the diode forward voltage characteristics (Vf) to limit the voltage applied across the Varistor. When the voltage across the Varistor exceeds the rated voltage (Vr), the diode conducts current, and the Varistor absorbs the surge energy. The Varistor is designed such that when the voltage across it decreases below the rated voltage (Vr), the diode does not conduct any current.

The Varistor absorbs the energy of a transient by allowing a larger current to flow when the voltage exceeds the rated voltage (Vr). This current causes some of the Varistor material to dissipate, thus controlling the voltage across the Varistor. The dissipated energy is dissipated as heat, and the Varistor is designed to withstand high thermal stress. Additionally, the amount of energy dissipated by the Varistor is affected by the rating, size, and material of the device.

The VK103MK151R025P050 Varistor is designed to operate at 25VDC, with a current rating of 050A (50A) and a maximum breakdown voltage of 151V. The device is housed in a TO-220 package with a thermal coefficient of 11mΩ/°C, making it suitable for high current applications.

The VK103MK151R025P050 Varistor is an ideal choice for applications where low voltage, high current transient protection is required. It is also a good choice for circuit protection in AC power supplies, DC-DC converters, low voltage DC circuits, and data bus protection in industrial, consumer, and automotive applications.

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