RUSBF135-2 Circuit Protection

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PTC Resettable Fuses are self-resetting fuses which are used in a wide variety of electrical and electronic circuits for protecting components and systems against over-current conditions. The RUSBF135-2 device is a thermal-activated, resettable fuse (also known as a Polymeric Positive Temperature Coefficient, or PTC resettable fuse) which provides robust circuit protection from up to 16V.

The fuse consists of two elements, a conductive polymer element and a resistance element. The conductive polymer element is a positively temperature-coefficient (PTC) material whose electrical resistance increases non-linearly with temperature. The resistance element is a metal-oxide round-wire resistor that provides a positive temperature coefficient.

When the RUSBF135-2 is installed in an electrical circuit, it will detect and limit over-current conditions. If the current exceeds the fuse\'s rated value, the resistance element limits the current flow rapidly. The PTC element then reacts to the increase in temperature and its resistance limits the current flow even further, thus preventing further damage. If the current is reduced to the rated value, the resistance of the elements returns to normal and allows current flow to resume. This resetting of the fuse after an over-current event is the reason why it is called a "resettable" fuse.

The RUSBF135-2 is suitable for a wide range of applications, such as over-current protection for switching power supplies, industrial control systems, lighting protection, automotive electronics, and telecom systems. It can provide protection against secondary-side short circuits, over-voltage protection, and even low-frequency high-voltage transients. The device is rated for up to 16V, with a maximum current of 6.5A. The RUSBF135-2 is available in surface mount packages and is also compatible with hot-air soldering and reflow soldering.

In summary, the RUSBF135-2 is a resettable fuse which provides robust circuit protection against over-current conditions. The device is easy to install and can provide protection in a wide variety of electrical and electronic circuits. Its rated voltage of 16V and maximum current of 6.5A make it suitable for a wide range of applications, and its surface mount packages make it compatible with hot-air soldering and reflow soldering.

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