RF4525-000

Ptc Resettable Fuses Overview

The RF4525-000 is a PolySwitch ASMD series resettable fuse manufactured by Littelfuse. It operates as a polymeric PTC device with a hold current of 250 mA and a trip current of 580 mA. The component features a maximum voltage rating of 16 VDC and a power dissipation of 600 mW. It has an initial resistance of 2.1 Ohms and utilizes SMD/SMT mounting style. The device exhibits a response time of 10 ms at trip conditions.

Ptc Resettable Fuses Feature Summary

• Functions as a polymeric PTC resettable fuse within the PolySwitch ASMD series
• Provides overcurrent protection through automatic tripping and resetting capabilities
• Designed for surface mount technology integration on printed circuit boards

Ptc Resettable Fuses Applications

• Portable electronic devices requiring compact circuit protection
• Data ports and cable connectors for transient protection
• Semiconductor safeguarding against overcurrent events

Ptc Resettable Fuses Procurement Notes

Verify the specific Littelfuse datasheet for moisture sensitivity handling requirements, as the component is classified as moisture sensitive. Confirm that the 16 VDC maximum voltage rating aligns with the target application's operating conditions to ensure reliable performance without premature failure or insulation breakdown during normal operation.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile surface mount solution is required for circuits operating below 16 VDC. The 250 mA hold current and 580 mA trip current define the protection threshold. Ensure the PCB layout supports the NANO SMD package dimensions and thermal requirements associated with the 600 mW power dissipation rating for proper heat management.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch ASMD series, which focuses on small form-factor resettable fuses. The RF4525-000 specifically addresses the need for space-constrained applications where traditional axial lead fuses are unsuitable. It complements other Littelfuse protection products like TVS diodes and medium-voltage fuses by offering reusable overcurrent protection at low voltage levels.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse documentation for direct cross-reference part numbers within the same ASMD series. Verify that any substitute maintains identical hold current, trip current, and voltage ratings to preserve circuit protection integrity.