VGAS120626F540DP Circuit Protection

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TVS (Transient Voltage Suppressors) are now commonly being used in various applications of industrial electronics, such as consumer-level automation, switchgear control and TV relay equipment. Varistors, also known as voltage-dependent resistors (VDRs) are one of the most commonly used components in TVS. The VGAS120626F540DP is a standard SOD-123 module, specifically designed for SMT motor drive configurations. This unit provides features such as a high peak pulse power rating, low clamping voltage and excellent surge capability. So, let’s look at the VGAS120626F540DP’s application field and working principle.

Application Field:

The VGAS120626F540DP is ideal for applications in consumer-level automation and industrial electronics, such as switchgear control and TV relay equipment. It is also suitable for protecting low cost motors from transient overvoltage conditions, such as those caused by lightening strikes. Additionally, it is appropriate for protection of the device\'s pins from collateral damage, due to high-power or voltage transients.

Working Principle:

The VGAS120626F540DP is based on MOV (Metal Oxide Varistor) technology. MOV technology utilizes a ceramic compound, which is responsible for the variable resistor behavior of the unit. This basic ceramic material has a uniquely resistive characteristic and exhibits a wide range of resistance values in response to different voltage amplitudes. This makes it an ideal material for use in transient voltage suppressors.

When an overvoltage such as a surge or spike is applied to the input of the VGAS120626F540DP, the MOV material changes its resistance state to reduce the voltage amplitude. This occurs through a process of “valving”, whereby certain materials inside the unit open up to partially conduct the current and reduce the input voltage accordingly. The VGAS120626F540DP has a very low clamping voltage (2.8V at 8A) and provides excellent surge (6kA peak with I²t of 62A²s) performance.

In addition to providing surge protection, the VGAS120626F540DP also prevents EMI/RFI (electromagnetic interferences and radio frequency interferences) from affecting other electronic components. It is also very useful in protecting devices from damage due to electrostatic discharge (ESD).

The VGAS120626F540DP is a great choice for protecting low cost motors from transient overvoltage conditions in industrial and consumer level applications. The unit offers a high peak pulse power rating, low clamping voltage, excellent surge capability, and EMI/RFI noise protection.

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