V20E320

Varistor Voltage (Typ):	510V
Package / Case:	Disc 20mm
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 85°C (TA)
Capacitance @ Frequency:	750pF @ 1MHz
Number of Circuits:	1
Energy:	273J
Current - Surge:	10kA
Varistor Voltage (Max):	561V
Series:	UltraMOV™
Varistor Voltage (Min):	459V
Maximum DC Volts:	420V
Maximum AC Volts:	320V
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

V20E320 is a voltage-dependent, non-linear over-voltage suppression device that also goes by another name: lightning protection device. It is a series of ceramic-based, surface-mountable (SMD) devices, specifically designed to protect power and signal line-level circuits from the damaging affects of electrical fast transients (EFT), electrostatic discharge (ESD), and lightning strikes. It has a wide variety of applications, from low-voltage DC protection to high-voltage AC protection, and is typically connected to the ground plane of a circuit board to provide an effective surge protection solution.

Working Principle

V20E320 works by limiting the current flow of over-voltage surges into a protected circuit. It employs an internal varistor, which is essentially a semiconductor device with voltage-dependent nonlinear characteristics. When the voltage on the varistor rises above its rated value, it switches from a low resistance to a high resistance state thus limiting the surge current. The internal varistor also acts as a latch, which means that the device will not reset once it has tripped. For this reason, V20E320 devices are usually designed as one-time use components and normally require replacement after a surge event.

Application Field

V20E320 is especially suitable for the protection of circuits in telecom systems, consumer electronics, or automotive applications where data, power, or signals transmission lines need to be protected from over-voltage transients. V20E320 can also be used to protect input and output power lines of different voltage levels. It can also be used in internal power supplies, such as those used in PC power supplies, as well as for battery back up supplies, LCD displays, and audio/video equipment. V20E320 can easily fit into small form-factor designs due to its small size and surface mountable format.

In addition, V20E320 can be used in RF applications, either as voltage protection for RF amplifiers or to limit ESD or lightning damage to base station equipment. Its fast response time makes it suitable for high-speed digital logic circuitry, where data corruption and component damage can be caused by undesired fast over-voltage transients. In industrial applications, V20E320 can be used as over-voltage protection in machine control systems, automation systems, on-field wind turbines and substations. It can also be used as a cost-effective surge protection device for residential power lines.

Conclusion

V20E320 is a proven and reliable over-voltage suppressor device that is applicable to many different types of applications. With its small size, high surge capability and fast response time, it is an ideal solution for protecting power and signal line-level circuits from the damaging affects of electrical fast transients (EFT), electrostatic discharge (ESD) and lightning. It is an effective surge protection solution for many different types of applications and can be used in a variety of settings such as telecoms, consumer electronics, machine control systems, audio/video equipment and residential power lines.

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