RUEF800K

Ptc Resettable Fuses Overview

The RUEF800K is a PolySwitch resettable PPTC fuse manufactured by Littelfuse, designed for through-hole PCB mounting. It features a radial lead form factor with a hold current of 8 A and a trip current of 16 A. The device supports a maximum voltage rating of 30 VDC and can withstand a maximum fault current of 100 A. Electrical characteristics include a minimum resistance of 20 mOhms and a power dissipation capacity of 4 W. The component operates within a temperature range of -40°C to +85°C, with physical dimensions measuring 30.2 mm in length, 21.6 mm in width, and 3 mm in height.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for circuits and wiring harnesses using solid-state polymer technology
• Automatically resets to a low-resistance state after cooling down following a fault event
• Offers high surge capability to handle transient overcurrent conditions without permanent damage

Ptc Resettable Fuses Applications

• Protection of automotive actuators, screens, and small motors
• Overcurrent safeguarding for telephony and networking equipment
• Circuit protection for consumer electronics and power supply components

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix K against official Littelfuse documentation to confirm package type and availability status. Ensure the selected variant matches the required hold current and voltage ratings for the target application circuit. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and traceability before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component based on the 8 A hold current requirement and 30 VDC system voltage constraints. Confirm that the 100 A maximum fault current rating exceeds the prospective short-circuit levels in the protected circuit. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range while accounting for self-heating effects at nominal current levels.

Ptc Resettable Fuses Part Context

This device belongs to the RUEF series of radial-leaded PolySwitch resettable fuses from Littelfuse. The series provides compact overcurrent protection solutions suitable for printed circuit board integration. The RUEF800K variant specifically addresses applications requiring an 8 A continuous current rating with robust fault handling capabilities in low-voltage DC systems.

Ptc Resettable Fuses Replacement Considerations

Compatible substitutes within the same family include RUEF900K for higher current requirements. Verify dimensional compatibility and electrical parameter alignment when considering alternative part numbers from the Littelfuse PolySwitch portfolio.