B72220P3251K101 Circuit Protection

Varistor Voltage (Typ):	390V
Package / Case:	Disc 20mm
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 105°C (TA)
Capacitance @ Frequency:	1300pF @ 1kHz
Number of Circuits:	1
Energy:	255J
Current - Surge:	12kA
Varistor Voltage (Max):	429V
Series:	SuperioR-MP, S20
Varistor Voltage (Min):	351V
Maximum DC Volts:	320V
Maximum AC Volts:	250V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction
The B72220P3251K101 is a TVS (Transient Voltage Suppressor) used in circuit protection applications. TVSs are devices that divert or suppress any unwanted surge or voltage spike in an electrical circuit. This is done to protect sensitive electronics and components connected to the circuit, e.g. motors, relays, switches, etc. from breakdown or damage. Spikes arise due to two reasons - inductive switching or static charge. TVSs protect circuits from both these types of spikes by dissipating the extra energy in the form of heat.

Application Field
The B72220P3251K101 is a general purpose TVS diode used in many industrial and domestic circuits. It is used to protect inputs and outputs of many types of equipment and electronic appliances from spikes. It is suitable for home appliances, consumer electronics, LED lighting and automotive electronics. It is also used in industrial machines, power supplies and instrumentation. It can also be used in communication systems (from telephone exchange systems to CATV and satellite systems) to protect input/output lines. It has a wide working temperature range, so it can be used in applications that are exposed to high or low temperature.

Working Principle
When an overvoltage condition is detected in a circuit connected to the B72220P3251K101, the device begins to divert/absorb most of the energy passing through it, thus suppressing the surge. Most TVSs, including the B72220P3251K101, have a very fast response time, typically in the nanosecond range. This means it can respond to the overvoltage condition quickly and efficiently. The device also has the ability to withstand a high current, which is needed in case of real current spikes.

Advantages
The B72220P3251K101 offers several advantages over traditional electrolytic capacitors for circuit protection purposes. One of the main advantages is that it is comparatively more reliable than capacitors and is also more effective in its application. It can handle higher voltages and currents compared to capacitors, making it more suitable for protection against electrical surges and overvoltages. It also has a very low capacitance, meaning it does not affect the signal path as much as capacitors. Furthermore, the B72220P3251K101 can work over a very wide temperature range, making it suitable for use in various environmental conditions.

Installation Considerations
As with any electronic component, it is important to consider the installation environment and how it will impact the performance of the component. In the case of the B72220P3251K101, it is important to consider the temperature of the environment, as well as the voltage and current for which the device is rated. It is also important to consider the distance between the device and the source of the surge to ensure maximum protection. Furthermore, it is important to consider the type of circuit in which the device will be installed. The type of circuit will determine the size and wattage of the TVS required.

Conclusion
The B72220P3251K101 is a general purpose, high performance TVS that can be used in many different applications for circuit protection. It is suitable for use in various environments and can withstand high voltage and current. It is a reliable and efficient device with a low capacitance, providing maximum protection against overvoltage conditions. Furthermore, it is important to consider the installation environment in order to ensure maximum performance.

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