RHEF900-2

Ptc Resettable Fuses Overview

The Littelfuse RHEF900-2 is a PolySwitch radial-leaded PPTC resettable fuse designed for circuit protection. It features a hold current of 9 A and a trip current of 18 A, with a maximum voltage rating of 30 VDC. The device has a maximum fault current (Imax) of 100 A and a typical resistance of 20 mOhms. Operating within a temperature range of -40°C to +85°C, it dissipates up to 4.2 W. Physical dimensions include a length of 29 mm, width of 24.1 mm, height of 3 mm, and a lead spacing of 10.9 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection using polymeric positive temperature coefficient technology.
• Features radial leads for through-hole PCB mounting applications.
• Designed to withstand high fault currents up to 100 A without permanent damage.

Ptc Resettable Fuses Applications

• Overcurrent protection in consumer electronics circuits
• Protection of portable battery-powered devices
• Industrial control system circuit safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly with Littelfuse or authorized distributors, as component specifications may vary by production lot. Confirm that the 30 VDC rating aligns with your system requirements, noting potential discrepancies in third-party listings claiming lower voltage ratings. Ensure the radial lead pitch matches your PCB footprint design before ordering.

Ptc Resettable Fuses Selection Notes

Select this component when a 9 A hold current and 30 VDC maximum voltage are required for radial-mounted protection. Consider the 20 mOhms resistance and 4.2 W power dissipation for thermal management in enclosed spaces. Verify that the 100 A Imax rating exceeds the expected fault current levels of the protected circuit to ensure reliable operation without nuisance tripping.

Ptc Resettable Fuses Part Context

The RHEF900-2 belongs to the Littelfuse RUEF/RHEF series of PolySwitch resettable fuses. This series represents a comprehensive line of radial-leaded PPTC devices engineered for robust circuit protection. These components are widely utilized in industries requiring reliable, self-resetting overcurrent safeguards for low-voltage DC applications.

Ptc Resettable Fuses Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Littelfuse official resources for direct cross-reference data.