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MF-R250-2-99
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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),Cut Tape (CT)
- 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-R250-2-99 is a radial leaded PPTC resettable fuse from the Multifuse MF-R series. It features a 2.5 A hold current and a 5 A trip current, rated for a maximum voltage of 30 VDC. The device exhibits a typical resistance of 48 mΩ and can withstand a maximum fault current of 40 A. It operates within a temperature range of -40°C to +85°C and utilizes a 5.1 mm lead spacing for PCB mounting.
Feature Summary
- Provides automatic circuit protection through positive temperature coefficient polymer technology
- Offers reliable resettable functionality without requiring manual replacement after fault events
- Designed for secure PCB mounting with standardized radial lead configuration
Applications
- Overcurrent protection in portable electronic devices
- Protection circuits for battery-powered equipment
- Surge protection in telecommunications signal lines
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number with official Bourns documentation. Confirm that the specific suffix matches the required packaging format. Ensure compliance with RoHS directives as specified in the technical datasheet before integration into production workflows.
Selection Notes
Select this component based on its 2.5 A holding current and 30 V rating for low-voltage DC applications. Consider the 48 mΩ impedance for minimal voltage drop requirements. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range during normal and fault conditions.
Part Context
This component belongs to the Bourns Multifuse MF-R series of resettable fuses. These devices utilize conductive polymer technology to provide overcurrent protection. The series is widely recognized for its compact size and ability to automatically restore circuit continuity after the fault condition is removed.
Replacement Considerations
Consult official Bourns substitution guides for verified equivalents. Generic replacements may not match the precise trip characteristics or physical dimensions required for the original design.
