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MF-RX250-0-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 2.5A RADIAL
- Series：Multifuse®, MF-RX
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：60V
- Current - Hold (Ih) (Max)：2.5 A
- Current - Trip (It)：5:00 AM
- Current - Max：40 A
- Time to Trip：15.6 s
- Resistance - Initial (Ri) (Min)：50 mOhms
- Resistance - Post Trip (R1) (Max)：130 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.839" L x 0.122" W (21.30mm x 3.10mm)
- Height - Seated (Max)：1.039" (26.40mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The MF-RX250-0-99 is a polymeric PTC resettable fuse from the Bourns MF-RX series, designed for through-hole radial mounting. It features a maximum voltage rating of 60 V and a hold current of 2.5 A. The device trips at a minimum current of 5.0 A and has a maximum trip time of 10 seconds. It supports a maximum fault current of 100 A and exhibits a typical resistance of 48 mΩ. The component operates within a temperature range of -40°C to +85°C and utilizes a disc package with a 5.1 mm lead spacing.
Feature Summary
- Provides automatic circuit protection by increasing resistance in response to overcurrent or overheating conditions
- Self-resetting functionality restores normal operation after the fault condition is removed and the device cools down
- Radial disc construction facilitates standard printed circuit board mounting techniques
Applications
- Overcurrent protection for portable electronic devices
- Protection circuits for telecommunications equipment
- Circuit safeguarding in consumer electronics
Procurement Notes
Verify that the specific suffix 0-99 corresponds to the required voltage and current ratings, as variations exist within the MF-RX family. Confirm that the radial disc package and 5.1 mm lead spacing align with the target PCB footprint. Ensure the application environment remains within the specified -40°C to +85°C operating temperature range to maintain reliable performance characteristics.
Selection Notes
Select this component when a 60 V maximum voltage rating and 2.5 A hold current are required for radial applications. The 48 mΩ typical resistance offers low power loss during normal operation. Consider the 100 A maximum fault current capability for robust surge handling. Verify compatibility with the assembly process regarding the radial disc form factor and lead spacing requirements.
Part Context
This part belongs to the MF-RX series of PTC resettable fuses manufactured by Bourns Inc. The series provides polymer positive temperature coefficient devices for circuit protection. The MF-RX line includes various voltage and current ratings to support different design requirements across multiple industries.
Replacement Considerations
Cross-reference with other MF-RX series variants such as MF-RX300-0-99 for higher current ratings. Verify equivalent specifications from other manufacturers if supply constraints exist, ensuring matching voltage, current, and package dimensions.
