B72220T2301K105

Series:	AdvanceD Thermofuse
Part Status:	Active
Lead Free Status / RoHS Status:	--
Maximum AC Volts:	300V
Moisture Sensitivity Level (MSL):	--
Maximum DC Volts:	385V
Varistor Voltage (Min):	423V
Varistor Voltage (Typ):	470V
Varistor Voltage (Max):	517V
Current - Surge:	3kA
Energy:	250J
Number of Circuits:	1
Capacitance @ Frequency:	780pF @ 1kHz
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	Radial, Box - 3 Lead

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Introduction

Varistors, MOVs (Metal Oxide Varistors) and B72220T2301K105 are all components for protecting electronics from transient overvoltages. While MOVs are most commonly used for overvoltage protection for electronics, B72220T2301K105 is a specialized varistor-based device with unique advantages that make it a suitable choice for certain application fields. The purpose of this article is to explain the application field and working principles of B72220T2301K105 in detail.

Application Field

B72220T2301K105 is a Varistor-based device designed for pulse-proof protection from overvoltage and overcurrent. It is made from a special type of silicon carbide varistor material, which has a large voltage coefficient and can withstand high energetic transients. This makes B72220T2301K105 ideal for applications where high power transient protection is necessary, such as power supplies, battery chargers, and other high-voltage applications. The device can also be used in applications such as switch mode power supplies, EMI filters, and overvoltage protection of I/O ports in PC boards.

Working Principle

The working principle of B72220T2301K105 is based on the Varistor effect. A varistor is a non-linear device which means that it has a voltage-dependent electrical resistance. This means that at low voltage levels, its electrical resistance will be higher. But as the voltage increases, the electrical resistance of the device will decrease.When there is a surge in voltage, the electrical resistance of B72220T2301K105 will decrease, allowing current to pass through it. This phenomenon is known as clamping, and it is the main function of the device. It enables it to clamp the voltage at a certain level, allowing only a fraction of the initial surge to pass through the device. This helps protect the circuit from damage due to transient overvoltages.

Conclusion

In conclusion, B72220T2301K105 is a specialized Varistor-based device designed for pulse-proof protection from overvoltage and overcurrent. Its unique design makes it suitable for applications where high power transient protection is necessary. The working principle of B72220T2301K105 is based on the Varistor effect, which enables it to clamp the voltage at a certain level, allowing only a fraction of the initial surge to pass through the device. This helps protect the circuit from damage due to transient overvoltages.

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