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MF-USML250-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 2.5A 1210
- Series：Multifuse®, MF-USML
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：2.5 A
- Current - Trip (It)：5:00 AM
- Current - Max：50 A
- Time to Trip：3.5 s
- Resistance - Initial (Ri) (Min)：4.5 mOhms
- Resistance - Post Trip (R1) (Max)：22 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-USML250-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse designed for overcurrent protection. It belongs to the Multifuse USM series, characterized by compact SMD packaging suitable for space-constrained layouts. The component provides robust circuit protection against short circuits and overloads in electronic systems.
Feature Summary
- Polymer PTC technology enables automatic reset after fault clearance without manual intervention
- Surface-mount design facilitates automated assembly and reduces footprint requirements
- High reliability construction supports operation in demanding thermal environments
Applications
- Overcurrent protection in automotive electronic circuits
- Surge and overload protection for high-reliability industrial equipment
- Fault protection in telecommunications and communication systems
- Circuit safeguarding in consumer electronics devices
Procurement Notes
Verify the specific suffix of the part number to confirm voltage rating and current characteristics. Ensure the selected variant matches the required hold and trip currents for the target application. Confirm RoHS compliance status through official documentation before integration into production designs.
Selection Notes
Select this component based on the required operating voltage and maximum continuous current for the protected circuit. Evaluate the thermal environment to ensure the device maintains functionality under expected ambient temperatures. Compare package dimensions against available board space constraints during the layout phase.
Part Context
This part is a member of the Bourns Multifuse USM series of resettable fuses. The series utilizes polymeric positive temperature coefficient materials to provide reliable overcurrent protection. These components serve as alternatives to traditional fusible links in modern electronic assemblies requiring resettable protection mechanisms.
Replacement Considerations
Consult official Bourns substitution guides for verified equivalent parts. Cross-reference technical specifications including voltage ratings and current thresholds when evaluating alternative suppliers or updated series revisions.
