ROV14H681K-2

Varistor Voltage (Typ):	680V
Package / Case:	Disc 14mm
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TA)
Capacitance @ Frequency:	310pF @ 1kHz
Number of Circuits:	1
Energy:	225J
Current - Surge:	6kA
Varistor Voltage (Max):	748V
Series:	--
Varistor Voltage (Min):	612V
Maximum DC Volts:	560V
Maximum AC Volts:	420V
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

TVS (Transient Voltage Suppressor) Varistors, MOVs (Metal Oxide Varistors) are very important components of modern electronic current limiting circuits. They are also known as Voltage Dependent Resistor (VDR) because of their ability to limit the current through them when voltage spikes occur. Generally, they are available in several ratings, although the most common rating is the ROV14H681K-2. In this article, we will focus on the application fields and working principle of ROV14H681K-2.

Application Fields

ROV14H681K-2 is widely used in many electronic devices and circuits, such as over-current protection, AC/DC power supplies, DC/DC converters, and surge protection circuits. It can also be used for surge current suppression in AC/DC power supply circuits, over-voltage protection in DC/DC converters, and voltage clamping in high-voltage devices.

Working Principle

ROV14H681K-2 is composed of an metal oxide varistor (MOV) element and a high voltage capacitor. The MOV element is a special device which can quickly reduce the voltage instantly when it reaches a certain threshold. When the input voltage exceeds the varistor\'s threshold, the varistor element will quickly switch off, forming a low impedance path and shorting out the input current. Thus, the MOV element can quickly eliminate the excessive input voltage and protect the circuit from damage caused by too much voltage.The capacitor, on the other hand, is a passive component which can store electrical energy. It is used to absorb any remaining voltage transient that passes through the MOV element. Hence, it can further protect the circuit from voltage spikes.

Conclusion

In conclusion, ROV14H681K-2 is an important component of many current limiting circuits. It is composed of a metal oxide varistor element and a high voltage capacitor. The MOV element can quickly reduce the input voltage when it exceeds the threshold while the capacitor can store electrical energy and absorb any remaining voltage transient. Thus, it can effectively protect the circuit from damage caused by excessive voltage spikes.

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