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MF-RX300-005
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 3A RADIAL
- Series：Multifuse®, MF-RX
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：60V
- Current - Hold (Ih) (Max)：3:00 AM
- Current - Trip (It)：6:00 AM
- Current - Max：40 A
- Time to Trip：19.8 s
- Resistance - Initial (Ri) (Min)：40 mOhms
- Resistance - Post Trip (R1) (Max)：100 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.980" L x 0.122" W (24.90mm x 3.10mm)
- Height - Seated (Max)：1.181" (30.00mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The MF-RX300-005 is a radial leaded PTC resettable fuse manufactured by Bourns Inc. It features a hold current of 3A and a trip current of 6A, with a maximum voltage rating of 60V. The device has a maximum resistance of 0.04 Ohms and a power dissipation of 2.8W. Its physical dimensions are 20.67mm x 3.1mm x 26.67mm, and it exhibits a response time of 19.8 seconds under specified conditions.
Feature Summary
- Utilizes cured, flame retardant epoxy polymer insulating material that meets UL 94V-0 requirements for safety.
- Designed as a radial leaded device suitable for wave soldering assembly processes.
- Provides overcurrent protection through positive temperature coefficient technology.
Applications
- Automotive circuit protection
- General electronic equipment overcurrent safeguarding
- Industrial control system component protection
Procurement Notes
Verify the specific suffix designation to ensure correct voltage and current ratings, as variations exist within the MF-RX300 series. Confirm compliance with RoHS directives and AEC-Q200 automotive qualification if required for the target application. Check manufacturer datasheets for precise thermal derating curves and maximum operating temperature limits before finalizing procurement specifications.
Selection Notes
Select this component based on the required hold current of 3A and maximum voltage of 60V. Ensure the radial package fits the PCB layout constraints given the 20.67mm length. Consider the 19.8-second response time for circuit timing requirements. Verify that the 2.8W power dissipation capability aligns with the ambient thermal environment of the installation site.
Part Context
This part belongs to the MF-RX300 series of PTC resettable fuses from Bourns. The series offers various voltage and current configurations in a radial leaded format. These components are designed for reusable overcurrent protection, distinguishing them from single-use fusible links. The series is widely used in applications requiring reliable, self-resetting circuit interruption capabilities.
Replacement Considerations
Consult official Bourns documentation for direct cross-reference part numbers. Verify that any substitute maintains identical hold current, trip current, and voltage ratings. Ensure the replacement component matches the radial lead configuration and dimensional footprint to guarantee proper mechanical fit and electrical performance in the existing design.
