CG0402MLC-05LGA

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A variety of circuit protection devices are currently available for electronic components, one of which is CG0402MLC-05LGA. This device falls under the category of TVS (transient voltage suppressor) and MOV (metal oxide varistor). Both serve the purpose of voltage protection, although each has their own distinct function. This article will delve into the specifics of both TVS and MOV in regards to the CG0402MLC-05LGA application field and working principle.

TVS

TVS, or transient voltage suppressor, is an essential device for protecting against high voltage transients, such as electrostatic discharge (ESD). It is a solid-state, unidirectional device that limits the voltage applied to the protected circuit. It does this by allowing current to flow through it when it exceeds a certain threshold, thus reducing the voltage to a safe level. The CG0402MLC-05LGA offers a low leakage current of 0.525uA, and a high surge capability of 45A (8/20µs), meaning it can handle a high level of surge current without sustaining damage.

MOV

MOV, or metal oxide varistor, is a voltage-dependent resistor. It is a two-terminal, non-linear device that is used to protect circuits from overvoltage surges. It works by diverting currents around circuits which are subject to excessive levels of voltage, thus providing the protection the circuit needs. Unlike TVS devices, it has a much lower surge capability of only 1A (8/20µs). However, it does offer a very low clamped voltage of 9.8V (at 8/20µs) and is much more suitable for protecting low voltage circuits. The CG0402MLC-05LGA has a high operational temperature range of -55°C to +125°C and a thermal resistance of 13.4°C/W, making it ideal for protecting circuits in high temperature environments.

CG0402MLC-05LGA: Application Field and Working Principle

Due to its high surge capability and low leakage current, the CG0402MLC-05LGA is well-suited for a range of applications. This includes industrial control equipment, instrumentation systems, computer systems, telecommunications, consumer electronics and automotive applications. In particular, it is suitable for use as an overvoltage protection device for low voltage, high frequency digital circuits.

The working principle of the CG0402MLC-05LGA is based on both TVS and MOV principles. When an overvoltage surge occurs, a large current will pass through the MOV device, causing it to act as a resistor and limit the current. Meanwhile, the TVS device will act as a diode, allowing a limited amount of current to flow through the circuit while at the same time clamping the voltage to a safe level.

Overall, the CG0402MLC-05LGA is a versatile device that combines both TVS and MOV technologies to offer superior circuit protection. It is suitable for a range of applications, from industrial control to automotive and consumer electronics. With its high surge capability, excellent thermal resistance, and low leakage current, it is the perfect choice for protecting low voltage, high frequency digital circuits from overvoltage surges.

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