MF-RX110-AP-99

Overview

The Bourns MF-RX110-AP-99 is a polymeric resettable fuse (PPTC) from the Multifuse series, designed for overcurrent protection in electronic circuits. This specific model features an axial leaded package configuration, indicated by the 'AP' suffix, suitable through-hole mounting applications. It operates as a self-resetting device that increases resistance significantly upon detecting excessive current flow, thereby limiting current to safe levels. The component is engineered to withstand repeated trip cycles without permanent degradation of its protective characteristics, providing reliable circuit safeguarding against short circuits and overload conditions in various consumer and industrial electronics.

Feature Summary

• Self-resetting polymeric positive temperature coefficient (PPTC) technology
• Axial leaded package for through-hole PCB integration
• Automatic restoration of low resistance after fault clearance
• High cycle life capability for repeated overcurrent events

Applications

• Consumer electronics power supply protection
• Industrial control circuit overcurrent safeguarding
• Battery pack protection systems
• Peripheral interface port surge prevention

Procurement Notes

Verify the exact hold current and trip current specifications against the official Bourns datasheet for the MF-RX110 series before finalizing design integration. Confirm that the axial leaded form factor aligns with your board layout requirements. Ensure compliance with relevant safety standards such as UL or CSA if required for your end product certification. Cross-reference the voltage rating to ensure it meets the system's maximum operating voltage under all conditions.

Selection Notes

Select this component based on the required hold current and trip current thresholds necessary for the target application's normal operating range. Consider the physical size constraints imposed by the axial leaded package compared to surface mount alternatives. Evaluate the time-to-trip characteristics to ensure adequate protection speed for sensitive downstream components. Verify that the ambient temperature environment does not derate the hold current below the circuit's maximum expected load.

Part Context

This part belongs to Bourns' Multifuse PPTC resettable fuse family, which provides cost-effective overcurrent protection solutions. The MF-RX110 designation indicates a specific current rating within the series, differentiated by axial leads for robust mechanical connection. These devices are widely used in industries requiring reliable, maintenance-free protection against accidental overloads and short circuits without the need for manual fuse replacement.

Replacement Considerations

Direct replacements must match the original hold current, trip current, and voltage ratings. Verify that any substitute component maintains the same axial leaded package style and pitch dimensions for compatibility with existing PCB footprints. Ensure the replacement part holds equivalent safety certifications if applicable to the end product.