MICROASMD010F-2

Overview

The Littelfuse MICROASMD010F-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse designed for overcurrent protection. It belongs to the microASMD series and features a 1812 (4532 metric) package with dimensions of 4.73 mm length, 3.41 mm width, and 0.89 mm height. The device maintains a holding current of 100 mA and trips at 300 mA, operating within a maximum voltage of 60 VDC. It exhibits an initial resistance of 12.7 Ohms and supports a maximum fault current of 40 A. The component is qualified under AEC-Q200 standards and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Provides automatic circuit recovery after fault conditions without manual replacement
• Offers high fault current interruption capability up to 40 A
• Complies with automotive reliability qualification standards

Applications

• Automotive electronics circuits requiring AEC-Q200 compliance
• Portable consumer electronic devices needing compact overcurrent protection
• Industrial control systems utilizing surface-mount assembly processes

Procurement Notes

Verify that the ordered component matches the exact manufacturer part number MICROASMD010F-2 to ensure correct electrical characteristics and package dimensions. Confirm that the supplier provides official documentation, including the datasheet and AEC-Q200 qualification records, to validate automotive-grade reliability. Check for RoHS compliance status and moisture sensitivity level handling requirements during storage and reflow soldering processes.

Selection Notes

Select this component when a 100 mA holding current and 60 VDC maximum voltage rating are required for space-constrained designs. The 1812 package size offers a balance between current handling capacity and board real estate. Consider the 12.7 Ohm initial resistance impact on low-voltage circuits. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range for optimal performance and longevity.

Part Context

This part belongs to the microASMD series of polymer PTC resettable fuses from Littelfuse. The series is characterized by small form-factor packages suitable for automated surface-mount technology assembly. These devices serve as reusable alternatives to traditional one-time fuses in modern electronic assemblies where maintenance access is limited or impossible.

Replacement Considerations

Direct replacements must match the 100 mA holding current, 60 VDC voltage rating, and 1812 package dimensions. Verify that substitute parts meet AEC-Q200 automotive qualification if used in automotive applications. Cross-reference resistance values and trip currents to ensure circuit compatibility.