V39RA8X2749 Circuit Protection

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TVS - Varistors, MOVs, are a type of device used for surge protection. The aim of these devices is to protect the lines, systems, and equipment from destructive transient overvoltages. One example of this type of device is the V39RA8X2749 which has been specifically designed for high-current and low-voltage surge protection applications. This article will discuss the application field and working principle of the V39RA8X2749.

The V39RA8X2749 is designed with a high current carrying capacity and with a low breakdown voltage for maximum protection. It has a nonlinear voltage vs. current characteristic which can be used to protect circuits from overvoltages of up to 110 volts. It can be used in applications such as power supplies, telecommunications equipment, medical equipment, and computer systems. The V39RA8X2749 is also rated for operating temperatures of -40 to +85°C, allowing it to be used in a wide range of operating environments.

The working principle of the V39RA8X2749 is based on the metal-oxide-varistor (MOV) technology. MOVs work by acting as a variable resistor that changes its resistance depending on the voltage applied. When a voltage is applied across the MOV, the resistance decreases, allowing current to flow. When there is an overvoltage event, the resistance increases, protecting the circuit. This is due to the nonlinear characteristics of MOVs. When an overvoltage occurs, the MOV’s resistance increases exponentially and therefore, the current is diverted to ground, preventing damage to the device or circuit.

The V39RA8X2749 also offers an additional layer of protection thanks to its built in thermal disconnect. This acts as an additional safety feature that disconnects the protective MOV in the event of overheating. This ensures that the device will not be permanently damaged due to excessive current.

The combination of the MOV technology and the thermal disconnect makes the V39RA8X2749 ideal for a wide range of applications. It is suitable for both AC and DC supplied circuits and is suitable for use in both indoor and outdoor applications. The V39RA8X2749 is also RoHS compliant, making it an ideal solution for applications where environmental concerns are a priority.

In conclusion, the V39RA8X2749 is an ideal protective device for a wide range of applications. It is based on the MOV technology, which offers a high current carrying capacity and a low breakdown voltage. It is also rated for operating temperatures up to +85°C and is RoHS compliant. Finally, it features a thermal disconnect for additional protection, making it an ideal solution for protecting circuits from overvoltages.

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