VM474MK122R040P050

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Transient Voltage Suppressors (TVSs) are semiconductor components designed to protect sensitive electrical and electronic systems from voltage transient overvoltage. They are widely used in television, automotive and consumer electronic applications such as cell phones, laptops, toys and white goods. Stationary and mobile electrical equipment can benefit from the robust protection that a TVS can provide against electrical transients.

VM474MK122R040P050 is a commonly used TVS in the form of an automotive Varistor. Varistors are non-linear voltage-dependent devices that respond to energy stored in the electric field and fire when the peak voltage exceeds a specific level. By absorbing part of the energy applied across its terminals, the Varistor will reduce the applied peak voltage to a safe level. This protection is achieved by clamping the peak voltage to a predetermined level until the peak passes.

The "VM" in its part number stands for Varistor Material; the "474" is its varistor voltage rating; the " MK122" identifies its operating temperature; the "R040" distinguishes its specific electrical characteristics; and lastly, the "P050" is its dielectric strength rating.

The application field of VM474MK122R040P050 is widely used in the protection of circuits and electronic equipment against transient voltages. The device is suitable for ESD, Surge and Transient protection. It also has low clamping characteristics, low EMI levels, high surge current capacity and excellent stability against temperatures and humidity. Its operating temperature range is -40℃~+125℃.

The working principle of VM474MK122R040P050 relies on its metal-oxide material acting as a dielectric. This dielectric is saturated when a certain voltage level is applied and therefore behaves like a capacitor. When a high transient voltage is applied, the oxide of the Varistor breaks down, allowing a large amount of electrical current to flow, this current being limited by the parasitic impedance of the Varistor. The large current causes a voltage drop across the Varistor, which is responsible for the high voltage clamping level that the Varistor offers.

The VM474MK122R040P050 Varistor offers typical clamping levels at around 70-90V, so it is best suited for applications that require moderate protection such as automotive, consumer and industrial electronics. It features a number of advantages, such as low clamping voltage, low capacitance, low leakage current, no derating and excellent thermal stability. Its popularity in a wide range of applications is due to its robust and highly reliable nature. It is also affordable and offers great value for money.

In conclusion, the VM474MK122R040P050 Varistor provides effective and reliable protection for circuits and electronic equipment against transient voltages. It has a wide operating temperature range and offers excellent thermal stability. Additionally, it is affordable and offers great value for money. This is why it is a popular choice for a variety of applications, from automotive to consumer electronics.

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