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MF-USML550/6-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 5.5A 1210
- Series：Multifuse®, MF-USML/X
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：5.5 A
- Current - Trip (It)：11:00 AM
- Current - Max：50 A
- Time to Trip：2 s
- Resistance - Initial (Ri) (Min)：1 mOhms
- Resistance - Post Trip (R1) (Max)：10 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 0.101" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.047" (1.20mm)
- Lead Spacing：-
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Overview
The MF-USML550/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. Designed for surface mount applications, this component utilizes a concave package configuration within the 1210 (3225 Metric) footprint. It features a maximum voltage rating of 6V and a hold current of 5.5A. The device exhibits a maximum thickness of 0.047 inches (1.20mm) and typically trips within two seconds under fault conditions.
Feature Summary
- Polymeric positive temperature coefficient technology for overcurrent protection
- Surface mount construction with concave profile for PCB compatibility
- Resettable functionality eliminates need for manual replacement after fault clearance
Applications
- Protection of low-voltage portable electronic circuits
- Overcurrent safeguarding in consumer audio and video equipment
- Circuit protection for battery-powered devices
Procurement Notes
Verify that the specific ordering suffix matches the required electrical ratings and package style. Confirm that the procurement source provides official datasheets to validate the 6V maximum voltage and 5.5A hold current specifications. Ensure the component meets the required RoHS compliance standards for the intended manufacturing process.
Selection Notes
Select this component when circuit design requires a compact surface mount solution with a 6V maximum operating voltage. The 5.5A hold current rating must align with normal operational loads while ensuring trip characteristics protect downstream components from excessive current surges without nuisance tripping during startup transients.
Part Context
This part belongs to the Bourns MF-USML series of polymer PTC resettable fuses. These devices are engineered for high-reliability applications requiring robust overcurrent protection in space-constrained environments. The series offers consistent performance across various consumer electronics and industrial control systems where resettable protection is preferred over single-use fuses.
Replacement Considerations
Direct substitutes include other 1210 SMD PPTC fuses with equivalent 6V and 5.5A ratings. Verify that alternative parts match the physical dimensions and thermal characteristics to ensure proper fit and function on the existing PCB layout.
