VLR170F

Ptc Resettable Fuses Overview

The Littelfuse VLR170F is a PolySwitch resettable PPTC device designed for overcurrent protection. It features a hold current of 1.7 A and a trip current of 4.1 A, operating at a maximum voltage of 12 V. The component supports a maximum fault current (Imax) of 100 A with a minimum resistance of 32 mOhms. It functions within an ambient temperature range of -40°C to +70°C.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising resistance as it heats to limit current flow during fault conditions.
• Acts as a solid-state fuse that automatically resets once the fault condition is removed and the device cools down.

Ptc Resettable Fuses Applications

• Protection of rechargeable batteries from overcurrent, short circuits, and overcharging.
• Overcurrent protection for automotive actuators, screens, and small motors in commercial and passenger vehicles.
• Circuit protection for wiring harnesses and PCB components in compact auto-electronics applications.

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix and package configuration against the official Littelfuse datasheet to ensure compatibility with the intended mounting style. Confirm that the selected variant meets all required AEC-Q200 automotive standards if applicable to the target application environment.

Ptc Resettable Fuses Selection Notes

Select this component based on the required hold current of 1.7 A and the system's maximum operating voltage of 12 V. Ensure the expected fault current does not exceed the 100 A Imax rating and verify that the thermal environment stays within the specified -40°C to +70°C operating range for proper functionality.

Ptc Resettable Fuses Part Context

The VLR170F belongs to the VLR series of PolySwitch resettable fuses manufactured by Littelfuse. This series is engineered specifically for automotive circuit protection, offering robust performance in demanding environments while providing reusable protection compared to traditional one-time fuses.

Ptc Resettable Fuses Replacement Considerations

The VLR170ULAF is a documented alternative part number within the same product family, sharing identical electrical specifications including 1.7 A hold current and 12 V rating. Verify mechanical mounting requirements before substitution.