SMD030-2

Ptc Resettable Fuses Overview

The Littelfuse SMD030-2 is a PolySwitch PTC resettable fuse designed for surface mount applications. It features a maximum voltage rating of 60V and a hold current of 300 mA. The device trips at 600 mA and supports a maximum fault current of 10 A. Its initial resistance is typically low, rising significantly upon tripping to limit circuit current. Packaged in a compact 2-SMD form factor, it operates within a temperature range of -40°C to +85°C. This component provides automatic circuit protection against overcurrent conditions without requiring replacement.

Ptc Resettable Fuses Feature Summary

• Polymeric self-resetting mechanism restores conductivity after fault clearance
• Surface mount construction enables automated PCB assembly integration
• Trip response limits current flow during short circuit or overload events

Ptc Resettable Fuses Applications

• Portable electronic device battery protection
• LED lighting circuit safeguarding
• AC-DC power adapter input protection
• Networking equipment interface circuits

Ptc Resettable Fuses Procurement Notes

Verify the specific manufacturer source when sourcing this component, as multiple suppliers list identical part numbers with varying descriptions. Confirm that the received unit matches the Littelfuse specification sheet regarding voltage and current ratings. Ensure compliance with RoHS directives if required by the end product. Check datasheet revisions for any updates to mechanical dimensions or thermal characteristics before finalizing the design.

Ptc Resettable Fuses Selection Notes

Select this component for circuits requiring 60V maximum working voltage and 300 mA continuous current handling. Ensure the expected fault current does not exceed the 10 A maximum rating to prevent device damage. Consider the trip time characteristics relative to the protected load's tolerance. Verify that the surface mount footprint aligns with the PCB layout requirements for reliable soldering and thermal management.

Ptc Resettable Fuses Part Context

This device belongs to the PolySwitch family of resettable fuses, offering a reusable alternative to traditional one-time fusible links. It utilizes polymer technology to provide rapid response to overcurrent conditions while maintaining a low profile suitable for dense circuit board layouts. The series is widely recognized for its reliability in consumer electronics and industrial control applications.

Ptc Resettable Fuses Replacement Considerations

The ASMDC030F-2 is a documented automotive-grade variant within the same manufacturer lineup. Verify that the higher voltage rating and AEC-Q200 qualification of the substitute meet the application requirements. Cross-reference mechanical dimensions to ensure compatibility with existing footprints.