SMD2920P250TFA

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PTC Resettable Fuses are an area of circuit protection with a range of applications and advantages over conventional thermal fuses. The SMD2920P250TFA is a Polymeric Positive Temperature Coefficient Resettable Fuse, and is an example of one such device for high current applications.

To understand the application field and working principle of the SMD2920P250TFA, it is first necessary to discuss the basic working principle of PTC Resettable Fuses. PTC Resettable Fuses operate on the principle of over-current protection. These fuses feature a Positive Temperature Coefficient (PTC) element that is connected across the line. When a fault current passes through the fuse, the element heats up, reducing its resistance. This increases the current further, eventually reaching a point where the temperature of the device is sufficient to automatically trip the fuse off, cutting the circuit. The user can then reset the device, restoring the circuit.

The SMD2920P250TFA is designed for use in applications with currents of 13 Ampere for 125V AC, 10 Ampere for 250V AC, and up to 63V DC. The fuse is operating temperature rated between -40°C and 85°C. It also features a low power dissipation of just 8mW. The device is highly reliable, and has a hold current of 0.5 times the trip current.

The SMD2920P250TFA is a surface mount device and is widely used in industries such as automotive, consumer electronics, and industrial applications. It is also commonly used in applications such as LED drives, power supply circuitry, and audio systems. The device has a compact design and is suitable for use in areas where space is limited. The device also features a high level of ingress protection, with an Ip3 rating.

In conclusion, the SMD2920P250TFA is a high current rated PTC Resettable Fuse for applications such as automotive, consumer electronics, and industrial applications. The device works by heating up when current passes through the fuse, leading to an automatic trip of the fuse to protect the circuit. The device features a surface mount design and is highly reliable, with a low power dissipation and high ingress protection rating.

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