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MF-RX375/72-2-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 72V 3.75A RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：3.75 A
- Current - Trip (It)：7.5 A
- Current - Max：40 A
- Time to Trip：24 s
- Resistance - Initial (Ri) (Min)：30 mOhms
- Resistance - Post Trip (R1) (Max)：80 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.926" L x 0.122" W (23.51mm x 3.10mm)
- Height - Seated (Max)：1.161" (29.50mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The Bourns MF-RX375/72-2-99 is a polymeric PTC resettable fuse from the Multifuse MF-RX/72 series. It features a maximum voltage rating of 72V and a hold current of 3.75A. The device trips at 7.5A with a trip time of 24 seconds. It has a maximum resistance of 80mΩ and operates within a temperature range of -40°C to +85°C. The component utilizes radial leads for PCB mounting.
Feature Summary
- Polymeric construction provides self-resetting protection against overcurrent conditions
- Radial leaded configuration facilitates through-hole PCB integration
- Certified compliance with UL standards and RoHS directives
Applications
- Overcurrent protection in electronic circuits
- Battery pack safeguarding systems
- Consumer electronics power input stages
Procurement Notes
Verify the specific ordering suffix, as variations such as -0-14 or -2-99 may indicate differences in packaging or lead plating rather than electrical performance. Confirm that the component status is active for new designs, as some listings indicate obsolete status. Ensure the selected variant matches the required lead spacing and package dimensions for the target application board layout.
Selection Notes
Select this component when a 72VDC maximum voltage and 3.75A continuous hold current are required. The 7.5A trip current provides a defined margin above normal operating levels. Consider the thermal environment, as the operating range extends to +85°C. Verify that the radial lead pitch fits the available PCB footprint and that the bulk packaging format aligns with assembly requirements.
Part Context
This part belongs to the Bourns Multifuse MF-RX/72 series of resettable fuses. These devices utilize conductive polymer technology to offer reusable circuit protection. The series is designed for applications requiring reliable overcurrent interruption without manual replacement, distinguishing it from traditional one-time fusible links.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other manufacturers' 72V, 3.75A radial PTC fuses only after verifying exact dimensional and electrical parameter compatibility.
