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MF-R250-0-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 2.5A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Bulk
- 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-R250-0-99 is a radial leaded PPTC resettable fuse from the MF-R series. It features a hold current of 2.5 A and a trip current of 5.0 A. The device supports a maximum voltage of 30 V with an initial resistance of 48 mΩ. Rated for a maximum fault current of 40 A, it operates within a temperature range of -40°C to +85°C. The component utilizes a bulk packaging format and has a lead spacing of 5.1 mm.
Feature Summary
- Provides automatic circuit protection through polymer positive temperature coefficient technology
- Offers resettable functionality after thermal tripping events
- Designed for PCB mounting with radial termination style
Applications
- Overcurrent protection in consumer electronics circuits
- Protection for portable battery-powered devices
- Surge protection in communication equipment interfaces
Procurement Notes
Verify component status as this specific part number may be classified as not recommended for new designs or obsolete. Confirm availability through authorized distributors only. Request updated datasheets to ensure compliance with current manufacturing specifications. Validate that substitute components meet identical electrical ratings if original stock is unavailable.
Selection Notes
Select this component when a 2.5 A hold current and 30 V rating are required for low-voltage applications. Ensure the 40 A interrupting capacity matches potential fault conditions. Consider the radial package and 5.1 mm lead spacing for board layout compatibility. Verify operating temperature requirements fall within the specified -40°C to +85°C range.
Part Context
This part belongs to the MF-R series of resettable fuses manufactured by Bourns Inc. The series is designed for general-purpose circuit protection using PPTC materials. The MF-R250-0-99 variant specifically targets applications requiring moderate current handling with reliable reset capabilities after fault clearance.
Replacement Considerations
DigiKey lists this product as obsolete. Consult manufacturer documentation for confirmed substitute part numbers. Ensure any replacement maintains equivalent hold current, trip current, and voltage ratings.
