MF-R090-0-009

Ptc Resettable Fuses Overview

The Bourns MF-R090-0-009 is a radial leaded PPTC resettable fuse from the MF-R/90 series, designed for PCB mounting. It features a hold current of 0.9 A and a trip current of 1.8 A at ambient conditions. The device supports a maximum voltage of 60 VDC and offers a high fault current rating of 40 A max. Initial resistance is specified at 310 mΩ typical. It operates within a temperature range of -40°C to +85°C and has a radial lead spacing of 5.1 mm with a diameter of 11.7 mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through self-resetting polymeric positive temperature coefficient technology.
• Offers high fault current interruption capability for robust overcurrent defense.
• Features radial leads suitable for standard printed circuit board assembly processes.

Ptc Resettable Fuses Applications

• Overcurrent protection in consumer electronic devices
• Circuit safeguarding in industrial instrumentation
• Protection for telecommunications equipment ports

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm packaging type and exact electrical tolerances. Ensure the selected variant matches the required hold and trip current specifications for the target application environment. Cross-reference the datasheet for compliance certifications such as UL or CSA before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component based on the required 0.9 A hold current and 60 VDC operating voltage constraints. Consider the thermal environment, as the device performance is rated up to +85°C. Evaluate the physical footprint requirements against the 11.7 mm diameter and 5.1 mm lead spacing to ensure compatibility with the PCB layout design.

Ptc Resettable Fuses Part Context

This part belongs to the Bourns MF-R/90 series of resettable fuses, which are widely used for secondary protection in electronic circuits. The series provides a reliable alternative to traditional one-time fuses by automatically restoring conductivity after the fault condition clears. It is engineered for applications requiring compact size and repeated surge tolerance.

Ptc Resettable Fuses Replacement Considerations

Direct replacements include the MF-R090-AP-009 variant, which shares identical electrical characteristics but differs in packaging format. Verify that any substitute maintains the same radial lead configuration and voltage ratings to ensure mechanical and electrical compatibility.