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MF-RX250/72-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 72V 2.5A RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：2.5 A
- Current - Trip (It)：5:00 AM
- Current - Max：40 A
- Time to Trip：15.6 s
- Resistance - Initial (Ri) (Min)：50 mOhms
- Resistance - Post Trip (R1) (Max)：130 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.702" L x 0.122" W (17.84mm x 3.10mm)
- Height - Seated (Max)：0.939" (23.84mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The Bourns MF-RX250/72-2 is a radial leaded PPTC resettable fuse from the MF-RX/72 series. It features a hold current of 2.5 A and a trip current of 5 A, rated for a maximum voltage of 72 VDC. The device has a typical resistance of 15.6 mOhms and a power dissipation of 450 mW. It operates within a temperature range of -40°C to +85°C and utilizes a rectangular package with a 5.1 mm lead spacing.
Feature Summary
- Provides automatic circuit protection through positive temperature coefficient polymer technology
- Offers repeatable reset functionality after fault conditions are cleared
- Designed for surface or through-hole PCB mounting applications
Applications
- Overcurrent protection in consumer electronics circuits
- Protection for portable battery-powered devices
- Surge and overload safeguarding in industrial control systems
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number with official Bourns documentation. Confirm that the specific suffix matches the required electrical ratings and packaging configuration. Ensure compliance with RoHS directives if applicable to your manufacturing process. Validate supplier authorization status before procurement.
Selection Notes
Select this component when a 2.5 A hold current and 72 VDC rating are required for circuit protection. Consider the 5.1 mm lead spacing for PCB layout compatibility. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range. Compare against alternative currents if higher or lower protection thresholds are needed.
Part Context
This part belongs to the MF-RX/72 series of resettable fuses manufactured by Bourns Inc. The series is characterized by its compact rectangular form factor and radial lead construction. It serves as a reusable alternative to traditional one-time fuses in various electronic assemblies requiring reliable overcurrent management.
Replacement Considerations
Compatible substitutes include other MF-RX/72 series variants with matching electrical specifications. Verify lead spacing and package dimensions to ensure mechanical fit. Check datasheets for equivalent hold and trip currents to maintain circuit protection integrity.
