VCAS120605D150DP Circuit Protection

Varistor Voltage (Typ):	8.5V
Package / Case:	1206 (3216 Metric)
Mounting Type:	Surface Mount, MLCV
Operating Temperature:	-55°C ~ 125°C (TA)
Capacitance @ Frequency:	3000pF @ 1kHz
Number of Circuits:	1
Energy:	0.40J
Current - Surge:	150A
Varistor Voltage (Max):	10.2V
Series:	TransGuard®
Varistor Voltage (Min):	6.8V
Maximum DC Volts:	5.6V
Maximum AC Volts:	4V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

TVS (Transient Voltage Suppressor) Varistors, MOVs (Metal Oxide Varistors), MOV (Motor Operated Valves) are three of the most commonly used Passive Electronic Components (PEC) used to protect electrical and electronic equipment from overvoltages of varying magnitudes. Specifically, they are designed and fabricated for optimal operation in limiting and suppressing over-voltage transients. This article will discuss the application field and working principle of VCAS120605D150DP, a particular type of TVS - Varistors, MOVs.

Application Field of VCAS120605D150DP

VCAS120605D150DP is designed mainly for automotive applications, such as engine control, power steering, automotive infotainment as well as signal protection in automotive audio systems. The part is a metal oxide based Non-Linear Resistor (NLR) with a peak power rating of 125W, and can absorb overvoltage transients with magnitudes reaching upto 150V.The part has an automotive grade epoxy encapsulation which ensures complete electrical insulation and makes it impervious to environmental conditions like moisture, dust, dirt, vibrations, shocks and so on, making its use in the automotive environment most suitable.

Working Principle of VCAS120605D150DP

The working principle of TVS - Varistors, MOVs like VCAS120605D150DP is based on the principle of nonlinear resistance. The nonlinear resistance characteristic of the part gives it the ability to absorb overvoltage transients with magnitudes reaching upto 150V.When a voltage across the device rises above a certain level, typically known as the clamping voltage (V1), the nonlinear resistance characteristic of the part causes a rapid increase in the current as shown in the figure below. This causes the device to absorb a large amount of energy from the transient and dissipate it in the form of heat. The absorbed energy is stored in the device itself until it dissipates in the form of heat, and in turn reduces the voltage of the transient back to a safe level.Thus, TVS - Varistors, MOVs like VCAS120605D150DP aid in providing protection against electrical and electronic equipment from overvoltages of varying magnitudes.

Conclusion

In conclusion, we can see that TVS - Varistors, MOVs like VCAS120605D150DP provide protection against electrical and electronic equipment from overvoltages of varying magnitudes, and have application mainly in the automotive space. The part has a peak power rating of 125W, and the nonlinear resistance characteristic of the part enables it to absorb overvoltage transients with magnitudes reaching upto 150V.

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