R1812-110-24-R

Ptc Resettable Fuses Overview

The OptiFuse R1812-110-24-R is a surface-mount polymeric resettable fuse (PTC) in the 1812 package. It features a maximum voltage rating of 24 VDC and a hold current of 1.1 A. The trip current is specified at 2.2 A, with a maximum trip time of 0.5 s under standard conditions. Initial resistance is typically 60 mΩ, rising to a maximum of 200 mΩ after tripping. The device operates within a temperature range of -40°C to 85°C and supports a maximum fault current of 100 A.

Ptc Resettable Fuses Feature Summary

• Polymer positive temperature coefficient construction for automatic circuit recovery
• Surface mount design compatible with standard SMD assembly processes
• High fault current capability up to 100 A for robust protection

Ptc Resettable Fuses Applications

• Portable electronic devices requiring overcurrent protection
• Consumer electronics circuits
• Computer peripheral interfaces
• Battery-powered equipment

Ptc Resettable Fuses Procurement Notes

Verify that the component matches the specific 24VDC voltage rating and 1.1A hold current requirements for the target application. Confirm the 1812 package dimensions align with the PCB footprint. Ensure compliance with RoHS standards if required by the project specifications. Cross-reference datasheet parameters against actual circuit load profiles to prevent nuisance tripping or inadequate protection levels during operation.

Ptc Resettable Fuses Selection Notes

Select this component when a low-profile surface-mount solution is required for 24VDC systems. The 1.1A hold current suits moderate load applications, while the 100A max fault current provides safety margin against surge events. Consider the 200mΩ maximum resistance impact on power loss. Evaluate thermal derating curves if ambient temperatures exceed standard operating ranges to ensure reliable performance under sustained load conditions.

Ptc Resettable Fuses Part Context

This part belongs to the R1812-R series of polymeric resettable fuses from OptiFuse. The series offers various voltage and current ratings within the compact 1812 footprint. These components serve as alternatives to traditional fusible links, providing reusable overcurrent protection. The R1812-110-24-R specifically targets lower voltage applications compared to higher-rated variants in the same family.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include Littelfuse 1812L110/33MR, which shares similar electrical characteristics but differs in voltage rating. Verify pin compatibility and thermal performance before substitution. Other manufacturers offer equivalent PTC fuses in the 1812 package; ensure hold current, trip current, and voltage ratings match or exceed original specifications.