V3.5MLA1206H Circuit Protection

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Varistors, also known as voltage dependent resistors (VDRs), are a type of semiconductor that can be used to regulate voltage. The main application of these components is to limit the voltage in an electrical system, thus providing protection against overvoltage transients. The MLV series of varistors, such as the V3.5MLA1206H, from Circuit Components, Inc. are designed specifically for this purpose. They provide reliable protection in circuits exposed to challenging conditions, such as lightning and electrostatic discharges.

The V3.5MLA1206H is a radial leaded, leaky electrochemical metal oxide varistor. It is designed to fit in a 1206 SMD package, making it an ideal solution for space-constrained systems. The V3.5MLA1206H has an encapsulated epoxy shell which provides protection against moisture, dust and other environmental factors. The device has a peak working voltage of 350V, and its maximum energy capacity is 32J.

The working principle behind varistors is relatively simple. The device is composed of a metal oxide material, surrounded by two electrodes. When the applied voltage exceeds the device’s threshold voltage, current starts to flow through the metal oxide material. As the current flows, the device’s resistance decreases, and it acts as a shunt across the circuit, limiting the voltage and current. The device will continue to pass current as long as the voltage remains above the threshold. As soon as the voltage drops below the threshold, the device stops conducting.

The V3.5MLA1206H, and all other types of varistors, are ideal for protecting circuits against ESD and lightning transients. This is because the device’s response is instantaneous, and the current can be diverted away from the sensitive components within the circuit. Additionally, varistors can be used to limit the inrush current of motors, capacitors and other inductive components when they first turn on. This helps to prevent the circuit from experiencing harmful power surges which can damage sensitive components.

In conclusion, the V3.5MLA1206H is a reliable and effective varistor designed to provide protection against overvoltage transients. This device, and others like it, can play an important role in the protection of electrical circuits of all kinds from the damaging effects of lightning, ESD and power surges. While the basic principles behind varistors are simple, their ability to provide effective and efficient protection in a variety of conditions makes them an essential component in many applications.

References:

Circuit Components, Inc. V3.5MLA1206H Varistor. (n.d). Retrieved from https://www.circuitcomponents.com/products/varistors/v3-5mla1206h-varistor

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