VCAS120631M650DP Circuit Protection

Varistor Voltage (Typ):	39V
Package / Case:	1206 (3216 Metric)
Mounting Type:	Surface Mount, MLCV
Operating Temperature:	-55°C ~ 125°C (TA)
Capacitance @ Frequency:	500pF @ 1kHz
Number of Circuits:	1
Energy:	1.0J
Current - Surge:	200A
Varistor Voltage (Max):	42.9V
Series:	TransGuard®
Varistor Voltage (Min):	35.1V
Maximum DC Volts:	31V
Maximum AC Volts:	25V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TVS - Varistors, MOVs

Varistors and metal oxide varistors (MOVs) are devices that protect circuits from transient voltage spike events. These devices are also known as Transient Voltage Surge Suppressors (TVSs). The VCAS120631M650DP is a metal oxide varistor designed for applications with transient voltage surges.

Applications

The VCAS120631M650DP is commonly used in power line surge protection, signal surge protection, and data line surge protection. It is used in telecommunications, industrial, and consumer electronics. It can also be used for lightning protection in a wide range of electrical and electronic systems, including automotive and airline electronics, military equipment, outdoor equipment, and solar cells.

Operating Principle

The VCAS120631M650DP is a metal oxide semiconductor varistor. This type of device works on the principle of nonlinear resistance. Under normal operation, the device behaves as an open circuit, allowing no current to flow. When an excessive transient voltage spike occurs, the resistance of the device drops, allowing current to flow. This action shunts the excess energy from the voltage spike to ground. This limits the voltage surge, protecting valuable equipment from overvoltage transients.

Design and Construction

The VCAS120631M650DP is a surface mount device, designed for resilience against mechanical stress and vibration. It has a peak nonlinear clamping voltage of 650 V and a 10/1000µs impulse peak power dissipation of 1206 watts. The device has an operating temperature range of -55°C to 125°C and is rated for a maximum temperature of 130°C. The device measures 1206 mil (31.0mm) by 650 mil (16.5mm). The VCAS120631M650DP is a multilayer construction varistor, composed of multiple layers of metal oxide material. The resistive element is the internal metal oxide layers, which form the core of the device. The top and bottom layers of the device act as electrodes that connect the internal metal oxide layers to the external circuit. The VCAS120631M650DP also has an epoxy terminator system on the outer surface of the device. This system helps ensure that the device remains electrically isolated from its environment.

Conclusion

The VCAS120631M650DP is a metal oxide varistor designed for applications with transient voltage surges. It is commonly used in power line surge protection, signal surge protection, and data line surge protection. It is a surface mount device, with a peak nonlinear clamping voltage of 650 V and a 10/1000µs impulse peak power dissipation of 1206 watts. The device is composed of multiple layers of metal oxide material, with an epoxy terminator system on the outer surface for electrical isolation.

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