0805L075WR-A

Overview

The Littelfuse 0805L075WR-A is a PolySwitch miniSMD polymer PTC resettable fuse designed for surface-mount applications. It features a hold current of 0.75 A and a trip current of 1.5 A, operating at a maximum voltage of 6 V DC. The component has a maximum resistance of 0.09 Ohms in its initial state and a maximum tripped resistance of 0.35 Ohms. It supports a maximum fault current of 40 A and dissipates up to 0.6 W. The device operates within a temperature range of -40°C to +85°C and utilizes a concave 0805 (2012 Metric) package with dimensions of 2.10 mm x 1.35 mm.

Feature Summary

• Polymeric construction enables automatic circuit restoration after fault conditions clear
• Concave surface-mount design facilitates reliable soldering on PCBs
• High breaking capacity ensures protection against significant fault currents

Applications

• Portable electronics battery pack protection
• USB port overcurrent protection
• Internal circuit protection for consumer devices

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm compliance with RoHS directives and material composition requirements. Ensure that the selected variant matches the required thermal derating characteristics for the intended operating environment. Cross-reference the datasheet specifications with system design parameters to validate electrical performance under all expected load conditions.

Selection Notes

Select this component based on the 0.75 A hold current requirement and 6 V DC system voltage. Confirm that the 0805 footprint aligns with the PCB layout constraints. Evaluate the thermal environment to ensure the device remains within the specified operating temperature range without requiring excessive current derating during normal operation.

Part Context

This part belongs to the Littelfuse 0805L series of miniSMD resettable fuses. These components are engineered for compact electronic designs where space is limited. The series provides reliable overcurrent protection using polymer technology, offering a cost-effective alternative to traditional fusible links in modern surface-mount assembly processes.

Replacement Considerations

The PICOSMDC075S-2 serves as a verified substitute with identical 0.75 A hold current and 6 V rating. Both parts share the same 0805 concave package form factor and similar electrical characteristics, allowing for direct replacement in compatible designs.