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MF-R500-0-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 5A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：5:00 AM
- Current - Trip (It)：10:00 AM
- Current - Max：40 A
- Time to Trip：14.5 s
- Resistance - Initial (Ri) (Min)：10 mOhms
- Resistance - Post Trip (R1) (Max)：50 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.685" L x 0.118" W (17.40mm x 3.00mm)
- Height - Seated (Max)：0.980" (24.90mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The Bourns MF-R500-0-99 is a radial leaded PolySwitch resettable fuse from the Multifuse MF-R series, designed for circuit protection against overcurrent and overheating. It features a hold current of 5 A and a trip current of 10 A at ambient temperature. The device operates with a maximum voltage of 30 VDC and can withstand a maximum fault current of 40 A. Its initial resistance is typically 30 mOhms. The component functions within a temperature range of -40°C to +85°C and utilizes a radial PCB mount configuration with a 10.2 mm lead spacing.
Feature Summary
- Provides automatic circuit interruption during overcurrent conditions through positive temperature coefficient polymer technology
- Restores conductivity automatically after fault clearance without requiring manual replacement
- Offers compact radial leaded packaging suitable for standard printed circuit board mounting
Applications
- Overcurrent protection in consumer electronic devices
- Circuit safeguarding in industrial control systems
- Protection for telecommunications equipment interfaces
- Surge and overload defense in automotive electronics
Procurement Notes
Verify the specific suffix designation when ordering, as variations such as AP or 99 may indicate differences in packaging format or tape-and-reel specifications rather than electrical performance. Confirm RoHS compliance status directly with the manufacturer or authorized distributor prior to procurement. Ensure that the selected variant matches the required lead spacing and package dimensions for your PCB layout constraints.
Selection Notes
Select this component when designing circuits requiring a resettable protection mechanism for low-voltage DC applications up to 30 V. The 5 A hold current makes it suitable for protecting power lines in medium-current consumer and industrial loads. Engineers should account for the device's thermal environment, as the trip current threshold is influenced by ambient temperature. Verify that the maximum fault current rating of 40 A exceeds the potential short-circuit current in the protected circuit to ensure reliable operation.
Part Context
This part belongs to the Multifuse MF-R series of resettable fuses manufactured by Bourns Inc. The series is characterized by its use of conductive polymer PTC materials to provide reversible overcurrent protection. These components serve as alternatives to traditional one-time fusible links, offering lifecycle cost savings in accessible applications. The MF-R line is widely utilized across various industries for its reliability and compact form factor.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Users seeking alternatives should consult official Bourns selection guides or contact technical support for cross-reference information based on specific electrical and mechanical requirements.
