MOV-10D390KTR

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TVS - Varistors, MOVs—MOV-10D390KTR application field and working principle

Varistors, also called voltage-dependent resistors (VDRs), and metal-oxide varistors (MOVs) are a type of semiconductor components used to protect equipment from high voltages. MOV-10D390KTR is a popular metal oxide varistor (MOV) device designed for AC power supplies, and offer great protection to machines from extreme over-voltage conditions and transients.

Understanding the application field and working principle of MOV-10D390KTR can help designers achieve better circuit protection results and avoid costly repairs. This article will discuss the application field and working principle of MOV-10D390KTR.

Application Field

MOV-10D390KTR provides excellent over-voltage protection for ac-coupled power supplies and data lines up to 400V―DIN EN61000-4-5 class B. It is designed for AC power supplies, including DC power line, and also provides protection to other sensitive circuits, such as loads, from high-voltage transients. This type of MOV is suitable for use in control panels, power distribution units (PDUs), and other electrical products that need sturdy and reliable protection.

Working Principle

MOV-10D390KTR includes a movable core with a ferrite material that ensures rapid and stable operation. This offers high clamping voltage and minimum over-voltage trigging current. When voltage is below the continous operating voltage (DV) ceiling, the MOV operates in open condition and allows the current to pass without any additional resistance. When voltage rises above DV, triggering overload current, the MOV begins to reduce the voltage, allowing smaller current and lower clamping voltage. This device is compliant to the IEC 61000-4-2 standard, and it is ensured to withstand high energy for its declared peak current.

MOV-10D390KTR includes an internal construction of four discs connected together with a metal oxide resistor. This MOV also includes metal end caps plus sealing rings, which provide excellent protection against mechanical and environmental impacts. The discs are made from a mix of zinc oxide and metal particles in a polyethylene terephthalate (PET) dielectric binder that helps reduce leakage current. As a result, it provides high stability and precise performance.

Conclusion

MOV-10D390KTR is a type of metal oxide varistor device that provides reliable over-voltage protection and prevents costly repairs. It is suitable for AC power supplies and other sensitive circuits, and provides high clamping voltage and low triggering current. Its internal construction includes discs made from a mix of zinc oxide and metal particles, with an PET dielectric binder and metal end caps. Understanding the application field and working principle of MOV-10D390KTR can help designers protect their circuits from over-voltage and transient events.

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