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MF-R250-2-10-99
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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 MF-R250-2-10-99 is a polymeric resettable fuse from the Bourns MF-R series, designed for overcurrent protection in electronic circuits. It features a hold current of 2.5 A and a trip current of 5.00 A at ambient temperature. The device supports a maximum voltage of 30 V DC and withstands a maximum fault current of 40 A. Initial resistance is specified as 48 mΩ max, with a typical value of 0.025 Ω. It operates within a temperature range of -40°C to +85°C and utilizes radial leads with a 5.1 mm spacing for PCB mounting.
Feature Summary
- Polymeric positive temperature coefficient (PPTC) construction for automatic circuit recovery after fault clearance
- Radial leaded package design facilitating through-hole PCB integration
- High fault current capability up to 40 A for robust surge handling
Applications
- Low-voltage DC power supply circuit protection
- Portable electronic device overcurrent safeguarding
- Battery pack circuit management
Procurement Notes
Verify component status carefully as this part number is marked as obsolete or not recommended for new designs by the manufacturer. Confirm availability of alternative packaging types or direct substitutes if sourcing for production. Ensure datasheet revisions match specific project requirements regarding thermal characteristics and mechanical dimensions before finalizing procurement decisions.
Selection Notes
Select this component for applications requiring a 2.5 A hold current and 30 V rating in low-profile through-hole configurations. Consider the 48 mΩ initial resistance impact on circuit efficiency. Evaluate the 10.3 s trip time against system response requirements. Verify that the radial lead spacing of 5.1 mm aligns with the target PCB footprint constraints and assembly processes.
Part Context
This device belongs to the Bourns MF-R series of PTC resettable fuses, which are widely used for secondary circuit protection. The MF-R series offers various current ratings and package options to suit different industrial and consumer electronics needs. This specific model represents a standard radial leaded variant optimized for general-purpose overcurrent protection tasks.
Replacement Considerations
Check for official substitute part numbers provided by Bourns Inc. due to the obsolete status. Alternative packages within the same MF-R family may be available. Verify electrical compatibility including hold current, trip current, and voltage ratings when selecting replacements.
