RTEF190-2

Ptc Resettable Fuses Overview

The Littelfuse RTEF190-2 is a PolySwitch resettable polymeric positive temperature coefficient (PPTC) device belonging to the RTEF series. It functions as a circuit protection component designed for overcurrent and overheating protection in electronic circuits. The device operates by increasing resistance significantly when fault conditions occur, thereby limiting current flow to protect downstream components.

Ptc Resettable Fuses Feature Summary

• Polymeric construction provides reliable resettable circuit protection capabilities
• Designed for surface mount integration onto printed circuit boards
• Offers automatic recovery after fault condition removal without manual replacement

Ptc Resettable Fuses Applications

• Overcurrent protection for portable electronics
• Protection of battery packs and charging circuits
• Circuit safeguarding in telecommunications equipment

Ptc Resettable Fuses Procurement Notes

Verify the specific electrical ratings and package dimensions against the official Littelfuse datasheet before procurement. Confirm that the selected variant meets the required voltage and current specifications for the target application. Ensure compliance with relevant safety standards and environmental regulations applicable to the end product.

Ptc Resettable Fuses Selection Notes

Select this component based on its resettable PTC characteristics suitable for applications requiring automatic circuit recovery. Evaluate the hold current and trip current requirements relative to the normal operating parameters of the protected circuit. Consider the physical size constraints and mounting orientation for proper PCB integration.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch RTEF series, which specializes in surface mount resettable fuses. The series is engineered for compact electronic designs where space is limited but reliable overcurrent protection is critical. It complements Littelfuse's broader portfolio of circuit protection solutions.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalent parts. Do not assume cross-compatibility with other manufacturers' PPTC devices without validating electrical and mechanical specifications.