RXEF090

Ptc Resettable Fuses Overview

The Littelfuse RXEF090 is a PolySwitch radial-leaded PTC resettable fuse designed for overcurrent protection. It features a maximum voltage rating of 72 VDC and a hold current of 900 mA. The device trips at 1.8 A and supports a maximum fault current of 40 A. Initial resistance is typically 200 mOhms, with a maximum post-trip resistance of 470 mOhms. It operates within a temperature range of -40°C to +85°C and utilizes a radial through-hole package.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for circuits, wiring harnesses, and PCB components
• Resettable function allows circuit recovery after fault conditions without replacement
• Compatible with high-volume electronics assembly processes

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 against the manufacturer datasheet to confirm packaging configuration, as standard designations may vary between bulk, cut tape, or reel formats. Ensure the selected variant matches the required lead spacing and mounting style for the target PCB layout. Confirm RoHS compliance status and agency approvals relevant to the end equipment's regulatory requirements before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component when a 72 VDC maximum voltage rating and 900 mA hold current are required for radial leaded applications. The 40 A interrupting rating suits circuits needing robust fault current handling. Consider the 470 mOhms maximum trip resistance for voltage drop constraints. This part is suitable for designs requiring UL, CSA, TUV, and CQC certifications for global market deployment.

Ptc Resettable Fuses Part Context

The RXEF090 belongs to the Littelfuse PolySwitch RXEF series, which offers low hold currents down to 50 mA and high voltage ratings up to 72 V. This series represents a comprehensive set of PPTC products compatible with high-volume assembly. The radial leaded form factor distinguishes it from surface-mount alternatives in the broader PolySwitch portfolio.

Ptc Resettable Fuses Replacement Considerations

The RXEF090-2 is a related variant within the same series offering identical electrical characteristics but potentially different packaging or lead configurations. Verify mechanical dimensions and lead spacing compatibility when substituting. Cross-reference agency file numbers to ensure equivalent certification coverage for the target application.