MF-RX110-0-99

Overview

The Bourns MF-RX110-0-99 is a polymeric resettable fuse (PPTC) from the Multifuse series, designed for overcurrent protection in electronic circuits. It operates on a thermal trip principle where increased current generates heat to switch the device to a high-resistance state. This component provides automatic circuit recovery once the fault condition is removed and power is cycled. It serves as a reliable alternative to traditional fuses by eliminating the need for manual replacement after a tripping event.

Feature Summary

• Provides automatic circuit recovery without manual intervention after an overcurrent event clears
• Offers dual-mode protection against both overcurrent conditions and excessive temperature rise
• Features a compact surface-mount design suitable for space-constrained printed circuit board layouts

Applications

• Portable computing devices such as laptops and tablets
• Peripheral interfaces including USB ports and data lines
• Battery packs and charging circuits in consumer electronics

Procurement Notes

Verify the specific holding and tripping current ratings required for your circuit design against the official datasheet specifications. Confirm that the package style matches your PCB footprint requirements. Ensure the voltage rating meets or exceeds the maximum operating voltage of the protected line. Check for any RoHS compliance declarations if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component based on the steady-state current requirements of the application to ensure proper holding current margins. Evaluate the maximum fault current expected to guarantee the device can handle the energy without damage. Consider the ambient operating temperature range to adjust derating factors appropriately. Verify compatibility with standard reflow soldering profiles used in assembly.

Part Context

This part belongs to the Multifuse family of polymeric positive temperature coefficient devices manufactured by Bourns Inc. These components are widely utilized across various industries for reusable overcurrent protection. The series is known for its reliability in protecting sensitive electronics from accidental short circuits and overload conditions.

Replacement Considerations

Consult the official Bourns replacement guide for verified substitute part numbers. Ensure any alternative maintains identical electrical characteristics and physical dimensions. Do not assume cross-compatibility with other manufacturers' PPTC devices without rigorous validation.