1812L300SLPR

Ptc Resettable Fuses Overview

The Littelfuse 1812L300SLPR is a surface-mount PolySwitch resettable PTC device from the Low Rho series. It provides overcurrent protection with a 6 VDC maximum voltage rating and a 3 A hold current. The component features a low initial resistance of 21 mOhms and a trip current of 7 A. Rated for a maximum fault current of 50 A, it operates within a temperature range of -40°C to +85°C. The device utilizes an SMD/SMT package in the 1812 (4532 metric) form factor, measuring 4.37 mm in length, 3.41 mm in width, and 0.7 mm in height.

Ptc Resettable Fuses Feature Summary

• Low resistance design minimizes power loss and voltage drop in sensitive circuits
• Solid-state polymer construction ensures reliable automatic reset after fault conditions
• Surface-mount compatibility facilitates automated assembly on printed circuit boards

Ptc Resettable Fuses Applications

• Overcurrent protection for portable electronic devices
• Circuit safeguarding in battery-powered equipment
• Protection for telecommunications and networking interfaces
• Power supply input filtering and protection

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix SLPR against the manufacturer datasheet to confirm packaging type and reel specifications. Ensure the procurement channel provides authentic Littelfuse components with traceable documentation. Cross-reference the RoHS compliance status and moisture sensitivity level requirements with your manufacturing process standards before finalizing orders.

Ptc Resettable Fuses Selection Notes

Select this component when a low-resistance PPTC fuse is required for 6V DC circuits carrying up to 3A. The 1812 footprint suits space-constrained PCB layouts. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range. Confirm that the 7A trip current aligns with the system's transient tolerance without nuisance tripping during normal startup.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse PolySwitch Low Rho series, designed for applications demanding minimal impedance. The 1812L series represents a standard size family, while the SLPR designation indicates specific packaging and material attributes. These devices serve as reusable alternatives to traditional fuses in consumer electronics and industrial control systems.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other 1812L series variants with matching electrical ratings, such as the 1812L300MR or 1812L300HTSR. Verify that any replacement maintains the same 6V voltage rating, 3A hold current, and 1812 physical dimensions to ensure board compatibility.