V220RA16X2749

Series:	RA
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Maximum AC Volts:	140V
Maximum DC Volts:	180V
Varistor Voltage (Min):	198V
Varistor Voltage (Typ):	220V
Varistor Voltage (Max):	242V
Current - Surge:	4.5kA
Energy:	42J
Number of Circuits:	1
Capacitance @ Frequency:	900pF @ 1MHz
Operating Temperature:	-55°C ~ 125°C (TA)
Mounting Type:	Through Hole
Package / Case:	Radial, Box

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V220RA16X2749 is a type of transient voltage suppressor (TVS) or, alternately known as Metal Oxide Varistor (MOV). Such components are essential elements of any electrical circuit, as they help in dampening any spikes and surges that can occur due to power fluctuations or external events such as lighting strikes. They also help to protect other components in the circuit from damage. Understanding the application field and working principle of the V220RA16X2749 can help engineers to design better circuit protection systems and make their products more reliable.The V220RA16X2749 was designed with various applications in mind, but is mainly intended for use in AC power lines or vehicles, where it can help to reduce transients generated by switching and/or from the lines themselves. The MOV can also be used in low voltage DC applications such as solar systems, industrial sensors, and even consumer electronics. The device comes with a High Rated Peak Surge Current of 28A (8/20us), along with a Max. breakdown voltage of 900V (@8/20us). It also has an insulation resistance >100Mohm, a thermal resistance of 62.5°C/W, and a capacitance of 130pF. These values, along with its UL 94V0 certified flamability rating, make the V220RA16X2749 a great choice for a variety of applications.The working principle of the V220RA16X2749 is relatively simple. The device is essentially an electronic switch that works by diverting excessive voltage away from the connected circuit. The internal structure of the MOV is composed of two metal layers (collectively called electrodes) made of zinc oxide, with a ceramic layer sandwiched between them. The ceramic material has a high dielectric constant, which allows the MOV to act as a capacitor when an external voltage is applied. When the voltage across the terminals of the MOV is less than the rated breakdown voltage, the MOV behaves like an open switch, allowing the current to flow freely. As soon as the voltage reaches the rated breakdown value, however, the MOV will start to conduct, and this conduction will be proportional to the applied voltage. Therefore, when an excessive voltage spike is applied to the MOV terminals, the current flowing through it will rise according to the applied voltage. This current will then flow through the MOV until the voltage is reduced sufficiently.Since the MOV is working as a thermal device, the amount of current it can handle is limited. The maximum amount of current it can handle is stated as the rated peak surge current, which in the case of the V220RA16X2749 is 28A (8/20us). This means that the MOV can handle a peak current of 28A when the spike lasts 20us. Thus, the device can help to protect other components in the circuit from short duration high voltage spikes up to 900V.In conclusion, the V220RA16X2749 is an excellent choice for a variety of applications where transient voltage suppression is required. Its high rated peak surge current, easy to use design, and high breakdown voltage makes it a great choice to protect sensitive components in an electrical system. As such, understanding its application field and working principle is essential for any engineer hoping to design better circuit protection systems.

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