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MF-USML400-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 4A 1210
- Series：Multifuse®, MF-USML
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Bulk
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：4:00 AM
- Current - Trip (It)：8:00 AM
- Current - Max：50 A
- Time to Trip：2 s
- Resistance - Initial (Ri) (Min)：1.5 mOhms
- Resistance - Post Trip (R1) (Max)：15.5 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.024" (0.60mm)
- Lead Spacing：-
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Overview
The Bourns MF-USML400-2 is a polymeric self-restarting PTC resettable fuse from the Multifuse MF-USML series. It features a maximum voltage of 6V and a hold current of 4A. The component utilizes a surface-mount 1210 (3225 Metric) concave package design. It provides overcurrent protection through positive temperature coefficient resistance characteristics.
Feature Summary
- Polymeric construction for reliable circuit protection
- Self-resetting functionality after fault clearance
- Surface-mount concave package for automated assembly
Applications
- Overcurrent protection in low-voltage electronic circuits
- Protection for portable device power inputs
- Battery-powered equipment safeguarding
Procurement Notes
Verify the specific suffix designation against official documentation to confirm exact electrical ratings and packaging configuration. Ensure the procurement order matches the required hold current and voltage specifications for the target application circuit. Confirm RoHS compliance status via the manufacturer datasheet before integration.
Selection Notes
Select this component based on the 6V maximum voltage rating and 4A hold current requirements. Evaluate the thermal environment to ensure proper derating. Consider the 1210 package size constraints for PCB layout. Compare performance against alternative multifuse series if higher voltage or current ratings are needed.
Part Context
This part belongs to the Bourns Multifuse MF-USML series of polymeric resettable fuses. These components are designed for surface-mount applications, offering compact protection solutions. The series provides a balance of holding current capacity and physical footprint suitable for modern electronics manufacturing.
Replacement Considerations
Consult official substitution guides for equivalent parts within the same series. Verify that any substitute maintains identical voltage, current, and package dimensions. Cross-reference with other Bourns multifuse families only if technical parameters align precisely.
