AHRL900

Ptc Resettable Fuses Overview

The Littelfuse AHRL900 is a resettable fuse belonging to the AHR series, designed for circuit protection in electronic applications. It features a radial leaded package suitable for through-hole mounting on printed circuit boards. The component is rated for a maximum voltage of 16 VDC and maintains a hold current of 9 A. It trips at 18.5 A and can withstand a maximum fault current of 50 A. The device operates within a temperature range of -40°C to +85°C and has a typical resistance of 28 mΩ.

Ptc Resettable Fuses Feature Summary

• Self-resetting polymer positive temperature coefficient (PPTC) technology eliminates the need for manual replacement after fault events.
• Radial leaded construction facilitates secure through-hole integration onto standard printed circuit boards.
• High fault current tolerance ensures robust protection against short circuits without permanent damage.

Ptc Resettable Fuses Applications

• Telecommunications equipment
• Battery pack protection systems
• Computing hardware
• Consumer electronics
• Automotive electronics

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet version for the AHRL900 to confirm exact thermal derating curves and mechanical dimensions prior to final design implementation. Ensure that the selected PCB layout accommodates the radial lead spacing and provides adequate airflow for thermal dissipation during normal operation and trip conditions.

Ptc Resettable Fuses Selection Notes

Select this component when a self-resetting overcurrent solution is required for low-voltage DC circuits. The 9 A hold current and 16 V rating define the operational envelope. Consider the 28 mΩ resistance impact on power loss and the 50 A maximum fault current capability relative to the system's prospective short-circuit current.

Ptc Resettable Fuses Part Context

The AHRL900 is part of the AHR series of resettable fuses manufactured by Littelfuse. This series utilizes polyswitch technology to provide reliable circuit protection. The components are widely recognized for their ability to reduce warranty costs and service requirements in remote or inaccessible electronic installations.

Ptc Resettable Fuses Replacement Considerations

Compatible substitutes include the AHRF900 from the same manufacturer family, which shares similar electrical ratings and package style. Verify that any alternative part matches the 16 VDC voltage rating and 9 A hold current specifications to ensure circuit compatibility.