30R900UH

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PTC Resettable Fuses, also known as polymeric positive temperature coefficient, are thermally-activated current interrupters that are widely used to protect electronic circuits from overcurrent. One of such products is the 30R900UH, and identifying its application field and working principle can enable users to better determine what their best option is.

Application Field of 30R900UH

The 30R900UH PTC Resettable Fuse features an extended trip range of 0.5A to 18A, allowing it to be used in a wide range of applications. It has been designed primarily for over-current protection in low-voltage applications, such as AC/DC adapters, telecom and networking equipment, home appliances, and consumer electronics. This means that it is suitable for use in most applications that require protection from high current events.

Working Principle of 30R900UH

The 30R900UH utilises polymeric positive temperature coefficient technology to protect against over-currents. It has three key components: a positive temperature coefficient element, a solder joint, and a PC board trace. The PTC element is responsible for controlling the amount of current flowing through the fuse, and it is activated when the temperature of the component reaches a certain threshold. Once this happens, the element quickly changes from a low resistance state to a high resistance state, which limits the current to a safe level.

The solder joint is responsible for connecting the PTC element to the PC board trace. This ensures that the element is positioned correctly and able to activate and deactivate appropriately. The PC board trace provides a conductive pathway for the current to flow through, and the overall design is such that any over-current event will cause the trace to heat up, activating the PTC element and tripping the fuse.

Conclusion

The 30R900UH PTC Resettable Fuse is an ideal choice for low-voltage applications that require protection from dangerous levels of current. Its extended trip range of 0.5A to 18A means that it can be used in a wide variety of applications, and its working principle of polymeric positive temperature coefficient technology guarantees reliable protection.

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