MOV-20D221KTR Circuit Protection

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TVS - Varistors, MOVs - MOV-20D221KTR Application Field and Working Principle

Varistors, also known as Voltage-Dependent Resistors (VDRs) or Multilayer Varistors (MLVs), are passive electronic components that work on the principle of voltage-dependence of their resistance. Varistors are non-linear devices that have both non-linear current and voltage characteristics. They are used for voltage filtering and energy storage of power surges in a wide range of applications including DC/AC protection circuits, lighting protection circuits, direct-current switching circuits, AC/DC converters, and motor control circuits.

Varistors, popularly known as MOVs (Metal Oxide Varistors), are the most common type of varistor available today. MOVs are made up of zinc oxide that is sandwiched between two electrodes. MOVs can be most accurately described as an inexpensive form of surge absorber or suppression device.They can absorb or dissipate large amounts of energy without suffering any damage. MOVs can have a wide range of operating voltages depending on their construction and they can be used to protect circuits in a variety of applications.

One of the most popular types of MOV is the MOV-20D221KTR. This device features a breakdown voltage range of 6.3 Volts (Vr) to 42 Volts and is designed to absorb large transients in applications that require high-surge current absorption. It is available as a single-pole 2-position (SPST) device with 4 terminals and is rated for a wide range of temperatures from 0 Celsius to 120 Celsius. The device has a capacitance of 37.3pJ and a resistance of 150 ohms.

The MOV-20D221KTR has a wide range of applications due to its ability to absorb large transients and handle high-surge current. It can be used to protect circuits such as lighting protection, AC/DC converters, DC/AC protection circuits, motor control circuits, direct-current switching circuits and many more. In addition to its wide range of applications, the MOV-20D221KTR is also popular due to its low cost and reliability.

The MOV-20D221KTR is a voltage-dependent device which means that its resistance will vary depending on the applied voltage. The device consists of a zinc oxide element which works on the principle that its atomic structure changes when voltage is applied to it. This results in the atoms within the material to rearrange themselves and form a network of tiny resistors. When a surge is applied to the MOV, resistance within the device increases. This results in current diverting into the device, preventing the current from reaching the rest of the circuit.

The MOV-20D221KTR is a reliable and cost-effective device used for surge protection, voltage filtering, and energy storage. Its wide range of applications, low cost, and reliability make it a popular choice among the many types of varistors available for use in today’s modern applications.

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