MICROSMD110F-2

Overview

The MICROSMD110F-2 is a surface-mount polymer PTC resettable fuse from the microSMD series by Littelfuse. It features a 1.1 A hold current and a 2.2 A trip current, designed for low-voltage applications with a maximum voltage rating of 6 VDC. The device offers a high maximum fault current capacity of 40 A and exhibits an initial resistance of 210 mOhms. Housed in a compact 1210 (3225 metric) package measuring 3.43 mm in length, 2.8 mm in width, and 0.48 mm in height, it supports operation within a temperature range of -40°C to +85°C.

Feature Summary

• Provides automatic circuit protection through reversible polymeric switching action upon overcurrent events
• Designed for direct surface mounting on printed circuit boards using standard SMD/SMT assembly processes
• Constructed with matte tin terminations to ensure reliable solderability and connection integrity

Applications

• Protection of portable electronic devices and mobile phone circuits
• Overcurrent safeguarding for USB peripheral ports and interfaces
• Circuit protection in automotive infotainment and telematics systems

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number MICROSMD110F-2 with official Littelfuse documentation. Confirm that the specific ordering suffix matches the required electrical parameters and packaging configuration. Ensure compliance with RoHS directives and check humidity sensitivity levels prior to storage and reflow soldering procedures.

Selection Notes

Select this component when space constraints require a small form factor while maintaining a 1.1 A continuous current rating. The 6 VDC maximum voltage limit dictates suitability for low-voltage logic and power rails. Evaluate thermal dissipation requirements against the 800 mW power dissipation capability to ensure stable performance under sustained load conditions.

Part Context

This device belongs to the microSMD product family, which focuses on miniaturized circuit protection solutions. It utilizes PolySwitch technology to provide resettable fusing capabilities. The series is engineered to replace traditional fusible link components in modern electronics where repeated overcurrent events may occur without requiring manual replacement.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.