VE0805K121R017

Series:	Automotive, AEC-Q200, VE
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Maximum AC Volts:	17V
Maximum DC Volts:	22V
Varistor Voltage (Min):	24.3V
Varistor Voltage (Typ):	27V
Varistor Voltage (Max):	29.7V
Current - Surge:	120A
Energy:	0.40J
Number of Circuits:	1
Mounting Type:	Surface Mount
Package / Case:	0805 (2012 Metric)

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TVS (Transient Voltage Suppressors) and Varistors /MOVs (Metal Oxide Varistors) are both electronic components that are used for the same purpose: to protect sensitive electronic devices from electrostatic discharge (ESD) or other surges in power. The difference between these two components is mainly in how they function, and the most common application of these components is in power supplies.The VE0805K121R017 is a varistor or MOV, which is a device that is used to provide surge protection for electrical systems. It is a metal-oxide varistor that is a bidirectional device, meaning it can protect against both positive and negative voltage surges. It is designed to protect against transient voltage spikes caused by electrical and electromagnetic interference (EMI), which can cause system errors, data loss, or even equipment damage.The working principle of the VE0805K121R017 is based on its non-linear resistance characteristics. When a voltage spike higher than the rated clamping voltage is applied to the metal-oxide varistor, an avalanche breakdown occurs, causing it to act as a low-impedance shunt resistor. This in turn limits the corresponding current and reduces the voltage across the MOV. When the voltage spike subsides, the MOV will resume its original non-linear resistance characteristics and return to its full blocking state.The typical application fields of the VE0805K121R017 include power supplies, signal line protection, consumer/industrial electronics, and automotive electronics. In power supplies, the MOV is used to protect sensitive components from power surges and spikes, which can be caused by lightning strikes, AC power outages, faulty equipment, etc. In signal line protection, the MOV can be used to protect data lines such as USB, HDMI, coaxial cables, and so on, from ESD. In consumer/industrial electronics, the MOV can be used to protect exposed circuits from ESD and other transients. In automotive electronics, the MOV can be used to protect vehicle electronics from voltage surges caused by different operating conditions.In conclusion, the VE0805K121R017 is a metal-oxide varistor that provides surge protection for electrical systems. It is bidirectional and works by limiting the current associated with voltage spikes. It is most commonly used in power supplies, signal line protection, consumer/industrial electronics, and automotive electronics. Its non-linear resistance characteristics make it a reliable and effective way to protect sensitive systems from surges and spikes in power.

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