AHS050-2

Ptc Resettable Fuses Overview

The Littelfuse AHS050-2 is a high-temperature PolySwitch resettable PPTC fuse designed for surface-mount PCB applications. It features a hold current of 500 mA and a trip current of 1.5 A, with a maximum voltage rating of 33 VDC. The device exhibits a typical resistance of 1.3 ohms and can withstand fault currents up to 70 A. It operates within a temperature range of -40°C to +125°C and dissipates up to 1.5 W of power. The component is housed in a 2018 (5045 metric) package.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection through automatic resistance increase upon heating
• Designed for high-temperature environments exceeding standard operating limits
• Offers resettable functionality to restore circuit continuity after fault clearance

Ptc Resettable Fuses Applications

• Automotive electronics secondary circuits
• Telecommunications equipment protection
• Power supply input/output filtering

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet revision and manufacturer part number accuracy before procurement. Confirm that the 2018 package dimensions align with the target PCB footprint. Ensure the selected variant meets the required thermal dissipation standards for the intended enclosure environment. Cross-reference the hold and trip currents against the circuit's normal operating parameters to prevent nuisance tripping during startup transients.

Ptc Resettable Fuses Selection Notes

Select this component when the application requires protection above standard temperature ratings. The 500 mA hold current suits low-power signal lines or sensor interfaces. The 33 VDC rating is suitable for low-voltage DC systems. Consider the 1.3 ohm resistance impact on signal integrity if used in sensitive analog paths. The high fault current rating of 70 A ensures robustness against short circuits.

Ptc Resettable Fuses Part Context

This device belongs to the PolySwitch family of resettable fuses from Littelfuse. These components utilize polymer positive temperature coefficient technology to limit current flow. The AHS series specifically targets high-temperature reliability needs compared to standard commercial grade parts. They serve as reusable alternatives to traditional one-time fusible links in modern electronic assemblies.

Ptc Resettable Fuses Replacement Considerations

The MINIASMDC050F-2 is a documented substitute part number. Note that the replacement has a lower maximum voltage rating of 24 VDC and a different package size (1812). Verify that the reduced voltage rating and physical dimensions are acceptable for the existing design constraints.