RUSBF110

Ptc Resettable Fuses Overview

The Littelfuse RUSBF110 is a radial lead PTC resettable fuse from the USBR series, rated for 16V DC with a 1.1A hold current and 2.2A trip current. It features a maximum resistance of 140 mOhms and a peak current rating of 40A. The device operates within a temperature range of -40°C to +85°C, dissipating up to 700mW. Dimensions are 14.2mm length, 7.4mm width, and 3mm height, with a 5.1mm lead spacing.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions through polymeric positive temperature coefficient technology.
• Designed specifically for USB port applications to ensure compliance with universal serial bus standards.

Ptc Resettable Fuses Applications

• USB port overcurrent protection
• Consumer electronics power lines
• Peripheral device input circuits

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation when ordering, as variants such as RUSBF110-2 exist with identical electrical ratings but potentially different packaging or tape-and-reel configurations. Confirm RoHS compliance status and certification marks (UL, CSA, TUV) required for your target market. Ensure the radial lead pitch matches your PCB footprint design before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component for low-voltage DC circuits requiring resettable protection rather than single-use fuses. The 1.1A hold current suits standard USB loads, while the 40A peak rating handles inrush currents. Consider the 140mOhm resistance impact on voltage drop in sensitive applications. Verify thermal derating requirements if operating near the upper temperature limit.

Ptc Resettable Fuses Part Context

This part belongs to Littelfuse’s USBR series, specialized for USB interface protection. It complements other resettable fuses by offering a compact radial form factor suitable for through-hole mounting. The series provides a balance between fast response times and high energy absorption capabilities typical of polymeric devices.

Ptc Resettable Fuses Replacement Considerations

The RUSBF110-2 is a confirmed substitute with matching 1.1A/16V specifications. Cross-reference lead spacing and physical dimensions to ensure mechanical compatibility. Verify that any alternative maintains the same UL and CSA certifications for regulatory compliance.