VA1812K801R030 Circuit Protection

Varistor Voltage (Typ):	47V
Package / Case:	1812 (4532 Metric)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C (TA)
Capacitance @ Frequency:	2200pF @ 1kHz
Number of Circuits:	1
Energy:	3.8J
Current - Surge:	800A
Varistor Voltage (Max):	51.7V
Series:	Automotive, AEC-Q200, VA
Varistor Voltage (Min):	42.3V
Maximum DC Volts:	34V
Maximum AC Volts:	30V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction to VA1812K801R030VA1812K801R030 is a TVS (Transient Voltage Suppressor) diode developed by Weihua Company, the world\'s leading manufacturer of semiconductor components. The diode is also known as a Varistor (Voltage Dependent Resistor) or MOV (Metal Oxide Varistor). This versatile device is used in a variety of applications to protect sensitive electrical devices and circuits from transient voltage spikes. Applications of VA1812K801R030VA1812K801R030 is commonly used in power supply systems and power distribution equipment. It is used to protect sensitive components from high-voltage transient spikes, such as those that can occur during a power surge or lightning strike. It is usually placed in series between the power supply and the sensitive equipment, ensuring transient voltages are quickly diverted away from the equipment. The VA1812K801R030 can also be used in automotive and industrial applications where low-voltage transients are present. It has a relatively high pulse current rating, which makes it suitable for use in high-speed switching circuits. It is also designed to withstand high temperature operations, making it suitable for use in high-temperature environments.Working Principle of VA1812K801R030VA1812K801R030 devices utilize a special design to protect against transients. They have internal metal-oxide-silicon (MOS) layers, which form a resistor-like structure. The layers are designed with a specific resistive value, and when a transient voltage spike is applied to the VA1812K801R030, the layers push the current away from the sensitive equipment and towards the VA1812K801R030 itself. This limits the amount of damage the spike can cause, and prevents it from reaching the protected equipment. The VA1812K801R030 is usually connected in series between the power supply and the sensitive equipment and must be able to conduct and dissipate a certain amount of current in order to keep the voltage spikes away from the sensitive equipment. The maximum voltage and amperage ratings of the device must be taken into account when selecting the correct size device for the application. ConclusionVA1812K801R030 is a versatile TVS diode designed for use in power supply systems and other applications where low-voltage transients are present. It has internal MOS layers which form a resistive structure, allowing it to divert current away from sensitive equipment and protecting it from damage caused by high-voltage transient spikes. The device must be chosen based on the voltage and amperage requirements of the application in order to ensure it can protect the sensitive equipment effectively.

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