1812L110/33MR

Ptc Resettable Fuses Overview

The Littelfuse 1812L110/33MR is a surface-mount polymeric PTC resettable fuse from the 1812L series. It features a maximum voltage rating of 33 VDC, a hold current (Ih) of 1.1 A, and a trip current (It) of 1.95 A with a typical trip time of 0.5 s. The device has a maximum resistance of 200 mΩ and operates within a temperature range of -40°C to +85°C. Its physical dimensions are 4.73 mm in length and 2 mm in height.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions through self-resetting polymer technology.

Ptc Resettable Fuses Applications

• Portable electronic devices
• Communication equipment
• Industrial control systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'MR' corresponds to the required tape-and-reel packaging configuration for automated assembly. Confirm that the 33VDC voltage rating aligns with the target circuit's maximum operating voltage to ensure adequate safety margins during fault events.

Ptc Resettable Fuses Selection Notes

Select this component when a compact SMD footprint is required for low-voltage DC circuits. Ensure the application current remains below 1.1 A under all ambient temperature conditions to prevent nuisance tripping. Verify thermal management requirements as power dissipation increases with ambient temperature.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse 1812L series of resettable fuses, designed for space-constrained applications. The series utilizes proprietary polymer technology to offer reliable overcurrent protection in a standard 1812 package size, suitable for high-volume manufacturing processes.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse documentation for verified cross-reference part numbers. Do not substitute based on generic electrical ratings alone; verify package compatibility and certification approvals.