VLR175LF

Ptc Resettable Fuses Overview

The Littelfuse VLR175LF is a PolySwitch resettable PPTC fuse designed for surface-mount PCB applications. It features a hold current of 1.75 A and a trip current of 4.2 A, with a maximum voltage rating of 12 V. The device offers a maximum interrupt rating (Imax) of 100 A and a typical resistance of 31 mOhms. Physical dimensions are 31.7 mm in length, 3.3 mm in width, and 0.8 mm in height. It operates within a temperature range of -40 C to +70 C and has a power dissipation rating of 1.4 W.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through self-resetting polymer technology
• Designed for low-profile surface-mount installation on printed circuit boards
• Offers high fault current interruption capability for sensitive electronics

Ptc Resettable Fuses Applications

• Portable electronic devices requiring overcurrent protection
• Consumer electronics circuits
• Battery pack protection systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix and RoHS compliance status against the latest manufacturer datasheet before integration. Confirm that the surface-mount package dimensions align with the target PCB footprint. Ensure the operating environment remains within the specified thermal limits to maintain reliable resettable fuse performance during normal operation.

Ptc Resettable Fuses Selection Notes

Select this component when a low-voltage, surface-mount resettable fuse is required for compact designs. The 1.75 A hold current suits moderate load applications. Consider the 12 V maximum voltage limit and the specific trip characteristics when designing for low-voltage DC circuits where space constraints necessitate a small SMD form factor.

Ptc Resettable Fuses Part Context

This part belongs to the VLR series of PolySwitch resettable fuses from Littelfuse. It represents a specialized variant optimized for surface-mount technology, distinguishing it from axial or radial leaded counterparts. The series focuses on providing robust circuit protection in minimal physical profiles suitable for modern dense PCB layouts.

Ptc Resettable Fuses Replacement Considerations

Cross-reference with other VLR series variants for different current ratings. Verify compatibility with equivalent SMD PPTC fuses from other manufacturers by matching hold current, voltage rating, and package dimensions.