B72225T4381K101

Varistor Voltage (Typ):	620V
Package / Case:	Radial, Box - 3 Lead
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Capacitance @ Frequency:	675pF @ 1kHz
Number of Circuits:	1
Energy:	600J
Current - Surge:	20kA
Varistor Voltage (Max):	682V
Series:	AdvanceD Thermofuse
Varistor Voltage (Min):	558V
Maximum DC Volts:	505V
Maximum AC Volts:	385V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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TVS - Varistors, MOVs

Varistors, or variable resistors, are electronic components used to protect electronic devices from electrical transients, or surges, that can potentially damage sensitive electronic equipment. The Varistor designation is composed of two or more letters, followed by numbers or symbols, which each signify a distinct feature of the component. In this article, we discuss the application field and working principle of the B72225T4381K101, a Varistor.The B72225T4381K101 is a surface-mount varistor made up of zinc oxide (ZnO) ceramic material and used to provide ESD and surge protection for individual I/O lines. The device has an embedded inner electrode that provides high clamping performance and exhibits low parasitic inductance. It is ideal for use in automotive and industrial applications, such as in automotive body control units, as well as high-speed and low-voltage data line transmission systems.This varistor has a maximum working voltage of 8V, with a rated current of 35A and a rated power dissipation of 55mW. It also has a breakdown voltage of 25V, making it suitable for use in transients up to 25V. Furthermore, its low capacitance and low temperature coefficient provide excellent performance in high frequency applications.The working principle of the B72225T4381K101 is based on the varistor effect. When exposed to a voltage higher than its breakdown voltage, the device exhibits a greatly increased electrical conductivity. This allows it to draw off the excess voltage, essentially forming a short circuit and protecting the circuit from harm. When the voltage decreases to the devices’ normal voltage, the device returns to its normal electrical resistance, effectively cutting off the current flow and protecting the circuit from damage.In conclusion, the B72225T4381K101 is a surface-mount varistor ideal for use in automotive and industrial applications to protect circuits from electrical transients. It has a maximum working voltage of 8V, a breakdown voltage of 25V, and a rated current of 35A, making it suitable for transients up to 25V. Its working principle is based on the varistor effect, which allows it to naturally draw off excess voltage and protect the circuit from harm.

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