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MF-R250U-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 2.5A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：2.5 A
- Current - Trip (It)：5:00 AM
- Current - Max：40 A
- Time to Trip：10.3 s
- Resistance - Initial (Ri) (Min)：25 mOhms
- Resistance - Post Trip (R1) (Max)：70 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.472" L x 0.118" W (12.00mm x 3.00mm)
- Height - Seated (Max)：0.720" (18.30mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-R250U-2 is a radial leaded PolySwitch resettable fuse from the MF-R series. It features a hold current of 2.5 A and a trip current of 5 A at maximum ambient temperature. The device supports a maximum voltage of 30 V DC with a maximum resistance of 48 mΩ. Operating temperatures range from -40°C to +85°C, with a lead spacing of 5.1 mm and a height of 18.3 mm.
Feature Summary
- Provides automatic circuit protection through self-resetting PTC technology
- Offers low initial resistance for minimal power loss in normal operation
- Designed for PCB mounting with radial leads for easy integration
Applications
- Overcurrent protection in consumer electronics
- Protection circuits in portable devices
- Industrial control system wiring protection
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number MF-R250U-2 with official Bourns documentation. Confirm that the radial leaded package and uncoated finish match the specific requirements for your assembly process. Ensure compliance with RoHS standards as indicated in the product specifications before finalizing procurement orders.
Selection Notes
Select this component when a 2.5 A hold current and 30 V maximum voltage rating are required for overcurrent protection. Consider the radial leaded configuration for through-hole PCB mounting applications. Evaluate the 48 mΩ resistance value against thermal management needs and the -40°C to +85°C operating temperature range for environmental suitability.
Part Context
This part belongs to the Bourns Multifuse MF-R series of resettable fuses. These components utilize polymeric positive temperature coefficient materials to provide reusable overcurrent protection. The series is designed for various electronic applications requiring reliable circuit interruption without manual replacement after fault conditions.
Replacement Considerations
The MF-R250-99 is a related variant within the same series offering similar electrical characteristics but packaged in bulk rather than reel format. Verify mechanical fit and lead spacing compatibility when substituting between packaging types.
