MF-R090-2-9-99

Ptc Resettable Fuses Overview

The Bourns MF-R090-2-9-99 is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the Multifuse MF-R/90 series. It features a holding current of 900 mA and a trip current of 1.8 A, with a maximum voltage rating of 60 VDC. The device has a low resistance of 310 mOhms and a maximum fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C and dissipates 1 W of power. Physical dimensions include an 11.7 mm diameter and 5.1 mm lead spacing.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection against overcurrent conditions through self-resetting functionality
• Utilizes polymeric PTC technology for reliable thermal response without permanent damage
• Designed for PCB mounting with radial leads for standard insertion applications

Ptc Resettable Fuses Applications

• Consumer electronics circuit protection
• Industrial equipment overcurrent safeguarding
• Telecommunication port protection

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix matches the required package configuration, as variations exist within the MF-R series. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation before integration. Ensure the selected variant aligns with the specific voltage and current requirements of the target design to maintain safety standards.

Ptc Resettable Fuses Selection Notes

Select this component when a radial leaded form factor is required for high-current resettable protection. The 900 mA holding current suits moderate load circuits needing surge tolerance. Evaluate the 60 VDC limit against system operating voltages. Consider the 310 mOhms initial resistance for potential voltage drop impacts in sensitive low-voltage designs compared to lower-resistance alternatives.

Ptc Resettable Fuses Part Context

This part belongs to the Bourns Multifuse MF-R/90 series, which offers robust overcurrent protection solutions. The series is characterized by its radial leaded construction and polymeric composition. It serves as a reusable alternative to traditional fusible links, providing cost-effective protection in various electronic assemblies where space and reusability are key considerations.

Ptc Resettable Fuses Replacement Considerations

The part number alias MF-R090-2-99 indicates equivalent sourcing options. Verify mechanical dimensions and electrical ratings match exactly when substituting. Ensure the replacement maintains the same radial lead spacing and voltage rating to fit existing board layouts and meet circuit safety requirements.