V18RA16X2749

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TVS (Transient Voltage Suppressor) and MOV (Metal Oxide Varistor) technologies have become increasingly important for applications that require protection of circuits against transient voltage. As the demand for protection against ESD (electrostatic discharge) and lightning surges continues to grow, these technologies help provide reliable operation of the system as well as protection against latch-up and ESD damage. One such device that is growing in popularity is the V18RA16X2749 varistor.

The V18RA16X2749 is a two-terminal radial-lead, non-polarized varistor. It has a non-linear voltage strain response which provides it with high peak inverse voltage (PIV) capability and low clamping voltage (V C = 56V for 10/1000 us). The V18RA16X2749 can withstand a maximum peak pulse current of 3000A (8/20 μs) or 600A (10/1000 us). In addition, the device has an insulation resistance of > 10000Mohm (50Vdc) which ensures long term reliability.

V18RA16X2749 is widely used in harsh condition applications such as automotive, industrial, white goods, telecom and other highway applications. In automotive applications, the device is used to protect circuits from transient overvoltage generated by airbag deployment, engine knock, and headlight dimming. In industrial applications, it can protect process control systems from transients caused by welding arcs. In telecom systems, it is used to protect telecom equipment from transients in both urban and rural networks. In white goods, it is used to protect appliance circuits from high voltage spikes caused by electrical motors. And in highway applications, it is used to protect traffic signal circuits from transients caused by lightning.

The working principle of a V18RA16X2749 varistor can be described by its anode-cathode curve and a simplified equivalent circuit. The anode-cathode curve shows an I-V curve which is non-linear. This curve shows that when voltage reaches a certain level, the current can rise very quickly due to the operation of the varistor. The equivalent circuit shows a network of resistors and capacitors (step-down resistor) which acts like a voltage clamp. This mechanism reduces the input voltage to a safe level.

In summary, the V18RA16X2749 varistor is an important component for many applications that require protection from transient voltage. It has high PIV capability and low clamping voltage, and it provides reliable operation and protection from ESD and latch-up damage. The device’s non-linear voltage strain response and equivalent circuit help to explain its working principle and make it an ideal choice for many applications.

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