ROV20H271K-S

Varistor Voltage (Typ):	270V
Package / Case:	Disc 20mm
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TA)
Capacitance @ Frequency:	1260pF @ 1kHz
Number of Circuits:	1
Energy:	190J
Current - Surge:	10kA
Varistor Voltage (Max):	297V
Series:	--
Varistor Voltage (Min):	243V
Maximum DC Volts:	225V
Maximum AC Volts:	175V
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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ROV20H271K-S Application Field and Working Principle

The ROV20H271K-S varistor, which is part of TVS (Transient Voltage Suppression) devices, is widely used in modern electronics when it comes to protecting the circuit element from transient voltage spikes. This device is ideal for use in motor control, remote sensing and surveillance, and industrial automation applications.A varistor, also known as a voltage-dependent resistor (VDR), is a component that modifies its electrical resistance depending on the voltage applied to it. The ROV20H271K-S varistor is a TVS device specifically designed to protect against surges in voltage. It is a non-linear voltage-dependent resistor that presents a very high impedance value when the voltage is low and a low impedance value when the voltage is high. This ensures that when a surge in voltage occurs, the ROV20H271K-S conducts or “clamps” the excess voltage and sends it away to a safe ground point.The ROV20H271K-S varistor is composed of zinc oxide (ZnO) chips that are encapsulated in a molded plastic body terminating in two solder pins. The ZnO chips are designed with a series of small pores that allow the device to react faster to surges in voltage. The porous structure also allows for a much larger energy absorbing capacity than other non-porous varieties.The working principle for the ROV20H271K-S varistor is simple. When the voltage goes beyond its specified threshold level, the device turns conductive (or changes its electrical resistance) and the current passes through the device. During this time, the device serves as a low-resistance path for the surge current, which ensures that the rest of the circuit’s components are not damaged due to the surge voltage.Thanks to its compact size, high energy absorbing capacity, and simple installation process, the ROV20H271K-S varistor is a great choice for a whole range of applications. It is especially popular in motor control, remote sensing and surveillance, and industrial automation. In these applications, the ROV20H271K-S ensures that surges in power or signals do not reach the primary circuit components and interfere with their performance.In summary, the ROV20H271K-S is a varistor designed to protect circuitry against transient voltage surges. This device is composed of zinc oxide chips and consists of two solder pins. It has a very high impedance value when the voltage is low and a low impedance value when the voltage is high. It is ideal for use in motor control, remote sensing and surveillance, and industrial automation applications, and is favored for its compact size, high energy absorbing capacity, and simple installation process.

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