30R300UU

Ptc Resettable Fuses Overview

The Littelfuse 30R300UU is a PolyFuse resettable PTC device designed for overcurrent protection in electronic circuits. It features a holding current of 3 A and a trip current of 6 A, operating at a maximum voltage of 30 VDC. The component exhibits a maximum resistance of 80 mOhms and supports a maximum rated current of 40 A. It operates within a temperature range of -40°C to +85°C, with a power dissipation rating of 2 W. Physical dimensions include a length of 19.2 mm, width of 11.4 mm, and height of 3 mm, utilizing radial leads with a 5.1 mm spacing.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Offers dual certification from UL and CSA for international compliance
• Utilizes polymer technology for consistent performance across specified thermal ranges

Ptc Resettable Fuses Applications

• Overcurrent protection for portable computing devices
• Circuit safeguarding in consumer electronics assemblies
• Protection for peripheral interfaces and data ports

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix UU against official Littelfuse documentation to confirm lead configuration and packaging format. Ensure that the selected variant matches the required axial or radial lead style for the target PCB layout. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component when circuit design requires a 3 A holding current and 30 VDC maximum voltage rating. Confirm that the application current remains below the holding threshold during normal operation to prevent nuisance tripping. Verify that the expected fault current does not exceed the 40 A maximum rated current limit to ensure safe interruption capabilities.

Ptc Resettable Fuses Part Context

This device belongs to the POLYFUSE 30R series of resettable fuses manufactured by Littelfuse. The series utilizes proprietary polymer positive temperature coefficient materials to provide reliable overcurrent protection. These components are engineered for surface mount or through-hole integration depending on the specific package variant selected.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalent part numbers. Do not assume functional interchangeability with generic PTC devices due to variations in trip characteristics and thermal response times.