0ZRC0055FF1E

PTC Resettable Fuses

PTC (Positive Temperature Coefficient) resettable fuses are a type of self-resetting circuit protection typically used to provide over-current protection for electronic devices. The 0ZRC0055FF1E is a resettable fuse designed to protect high-current dc circuits from overload and short circuit conditions.

Application Field

The 0ZRC0055FF1E is particularly suited to applications in motor drive, battery protection, power supply and heavy load switching. It is engineered for continuous protection and rapid resetting on an overload or short circuit condition. The 0ZRC0055FF1E has the ability to reduce the inrush current to the load, allowing the load to start up without a surge or spike in current.

Working Principle

The 0ZRC0055FF1E is a polymer-based resettable fuse designed with a Positive Temperature Coefficient (PTC) structure. This structure allows for a correlation between a current level and a temperature increase proportional to that current. A unique feature of the 0ZRC0055FF1E is the ability to detect even small overloads and short circuits. This is due to the fact that the design of the resettable fuse allows for a significant increase in resistance when exposed to even small amounts of current.

When the current exceeds a certain predetermined value, the device increases in resistance enough to limit further current flow. This allows for efficient over-current protection without the need to replace a fuse. Once the overload or short circuit condition has been removed, the device will reset to the original on-state.

Conclusion

The 0ZRC0055FF1E resettable fuse provides efficient protection from over-current and short circuit conditions. Its robust design also allows it to reduce the circuit’s inrush current when starting up, due to the PTC structure. It is also designed to reset quickly, allowing the circuit to remain operational when it is exposed to small overloads or short circuits.