RXEF185K-2

Ptc Resettable Fuses Overview

The Littelfuse RXEF185K-2 is a PolySwitch radial leaded PPTC resettable fuse designed for overcurrent protection. It features a hold current of 1.85 A and a trip current of 3.7 A, operating at a maximum voltage of 72 VDC. The device has a maximum interrupting rating of 40 A and an initial resistance of 190 mOhms. It supports a power dissipation of 2.1 W and functions within a temperature range of -40°C to +85°C. Physical dimensions include a 16.76 mm diameter and 3 mm height with a 5.8 mm lead spacing.

Ptc Resettable Fuses Feature Summary

• Provides resettable overcurrent protection using polymer positive temperature coefficient technology
• Offers multiple international agency approvals including UL, CSA, TUV, and CQC
• Supports high-volume electronics assembly through standard radial lead mounting
• Complies with RoHS standards and is lead-free and halogen-free

Ptc Resettable Fuses Applications

• Satellite video receivers
• Industrial controls
• Computer motherboards
• USB hubs, ports and peripherals
• Battery packs

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix and package configuration when sourcing this component. Confirm that the requested quantity matches the available reel or cut tape packaging options provided by authorized distributors. Ensure compliance with the manufacturer's environmental declarations and agency certification requirements relevant to your target market before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component for circuits requiring 72 VDC protection with a 1.85 A holding capacity. Consider the radial form factor for through-hole PCB integration where space allows for a 16.76 mm diameter footprint. Evaluate the 2.1 W power dissipation capability against thermal constraints in the application environment to ensure reliable operation under fault conditions.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RXEF series of PolySwitch resettable fuses. The series provides a comprehensive range of radial-leaded devices balancing voltage ratings up to 72V with various hold currents. These components are engineered for robust circuit protection in consumer electronics and industrial equipment, offering a reliable alternative to single-use fuses.

Ptc Resettable Fuses Replacement Considerations

The RXEF185K-AP is a documented equivalent part number for this component. Verify pinout compatibility and electrical specifications when substituting.