MOV-10D121KTR Circuit Protection

Varistor devices, widely known as MOVs (Metal Oxide Varistors), typically consist of a ceramic mass loaded with metal oxide powder, sandwiched between two electrodes. The MOV-10D121KTR is a single-phase device that limits transient overvoltage responsible for electrical surges and spikes. It has a rated surge current of 10kA (8/20μs) and a max operating voltage of AC127V and DC650V.

In normal conditions, the MOV-10D121KTR functions as an open circuit. When the input voltage exceeds the operational threshold of the device, current becomes flowing through the electrodes and the ceramic mass undergoes a reversible change in resistance. This dissipates the energy by providing a non-linear impedance to the surge.

MOV-10D121KTR devices are especially suitable for transient overvoltage protection of power-supplies, motors, AC loads. They are also used in charging circuits, PCs or telecom systems to protect against surges generated by incoming line faults and electromagnetic interference.

The working principle of MOV-10D121KTR is based on nonlinear voltage-dependent resistors, commonly referred to as varistors. As such, the device contains a mass of semi-conducting material placed between two electrodes, combined with zinc oxide and other substances. This material comprises many microscopic sintered ceramic disks connected in series, forming semicon-ducting grains that contain grain boundaries.

When the voltage is low, the MOV-10D121KTR functions as an open circuit. When the voltage exceeds the device’s threshold, current flows through the electrodes and the ceramic mass undergoes a reversible change in resistance, dissipating the surge energy. Thus the device can effectively and safely limit the transient overvoltage.

The MOV-10D121KTR features a maximum peak surge current of 10kA (8/20μs) and a max operating voltage of AC127V and DC650V. It has a good clamping capability and excellent noise reduction performance. In addition, this device has a low dynamic impedance and high frequency characteristics.

The MOV-10D121KTR has a wide range of applications. It is widely used in power supply, motor, AC load, telephone communication, computer and other electrical circuit for transient overvoltage protection. This device can also be used in surge absorbers, lightning arresters and ESD protection circuits for effectively suppressing high-speed, large current power outage.

In conclusion, the MOV-10D121KTR is a varistor device specifically designed to protect sensitive electrical circuits from transient overvoltage. It has a rated surge current of 10kA (8/20μs), a max operating voltage of AC127V and DC650V, and a good clamping capability. This device offers excellent noise reduction performance, low dynamic impedance and high frequency characteristics. It has a wide range of applications in power supply, motor, AC load, telephone communication, computer and other electrical circuits for the purpose of effective protection against transient overvoltage.