RUSB075

Ptc Resettable Fuses Overview

The Littelfuse RUSB075 is a PolySwitch resettable polymer positive temperature coefficient (PPTC) device designed for overcurrent protection. It functions as a solid-state fuse that automatically increases resistance when heated by excessive current, thereby limiting the flow to safe levels. Upon cooling and fault removal, the device resets to its low-resistance state, providing reusable circuit protection without the need for manual replacement.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection for sensitive electronic circuits
• Utilizes polymer technology to increase resistance during fault conditions
• Offers reliable protection against short circuits and overcurrent events
• Eliminates the need for manual fuse replacement after tripping

Ptc Resettable Fuses Applications

• Protection of telecommunications equipment and line interfaces
• Overcurrent safeguarding for battery-powered consumer electronics
• Circuit protection in automotive accessory wiring harnesses
• Defense of portable computer peripherals and interface ports

Ptc Resettable Fuses Procurement Notes

Verify the exact part number suffix to ensure correct voltage and current ratings, as Littelfuse uses specific codes to denote variations within the RUSB series. Confirm that the selected variant matches the required hold current and trip characteristics for the target application. Check for recent process change notifications or obsolescence notices directly from the manufacturer before finalizing procurement decisions.

Ptc Resettable Fuses Selection Notes

Select this component based on the required hold current and maximum operating voltage for the specific circuit being protected. Ensure the package style and lead configuration match the PCB layout requirements. Consider the thermal environment and ambient temperature limits, as these factors influence the actual performance and trip time of the PPTC device under load conditions.

Ptc Resettable Fuses Part Context

The RUSB075 belongs to Littelfuse's PolySwitch family of resettable fuses, which are widely used for circuit protection in various industries. This series is characterized by its polymer construction and ability to provide reusable overcurrent protection. The component is part of a broader portfolio of circuit protection solutions offered by Littelfuse, focusing on reliability and ease of integration into modern electronic designs.

Ptc Resettable Fuses Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When replacing this component, ensure the new part matches the original specifications for hold current, trip current, and voltage rating. Verify compatibility with the existing PCB footprint and thermal requirements to maintain circuit integrity.