MF-RX075/72-2-17

Overview

The Bourns MF-RX075/72-2-17 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse series. It provides overcurrent protection with a hold current of 0.75 A and a trip current of 1.5 A. The device operates at a maximum voltage of 72 V DC and withstands fault currents up to 40 A. It functions within an ambient temperature range of -40°C to +85°C, offering reliable circuit safeguarding in compact through-hole configurations.

Feature Summary

• Self-resetting polymer PTC technology eliminates the need for manual replacement after fault conditions.
• Radial leaded construction facilitates easy insertion into printed circuit boards.
• Provides robust overcurrent and thermal protection against short circuits and excessive loads.

Applications

• Consumer electronics power supply input protection
• Portable battery-powered device circuit safeguarding
• Industrial control board overcurrent protection

Procurement Notes

Verify the specific suffix codes on official Bourns documentation to confirm lead finish and reel packaging specifications. Ensure the selected variant matches the required hold and trip current ratings for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before finalizing procurement orders.

Selection Notes

Select this component when a radial leaded form factor is required for high-voltage applications up to 72 V. The 0.75 A hold current suits moderate load protection needs. Consider the 40 A maximum fault current capability for handling transient surges. Evaluate space constraints on the PCB layout to accommodate the radial leads while maintaining adequate clearance for heat dissipation during tripping events.

Part Context

This part belongs to the Bourns Multifuse MF-RX series, designed for general-purpose circuit protection. It complements surface mount options by providing a through-hole alternative for designs requiring mechanical stability or specific mounting orientations. The series is widely used in industries demanding reliable, cost-effective resettable fuses for consumer and industrial equipment.

Replacement Considerations

Consult the official Bourns Multifuse selection guide for direct replacements with identical electrical characteristics. Verify that substitute parts match the 72 V rating and 0.75 A hold current. Ensure physical dimensions and lead spacing are compatible with existing PCB footprints to avoid rework.