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MF-USML400/6-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 4A 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)：4:00 AM
- Current - Trip (It)：8:00 AM
- Current - Max：50 A
- Time to Trip：5 s
- Resistance - Initial (Ri) (Min)：2 mOhms
- Resistance - Post Trip (R1) (Max)：18 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-USML400/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. Designed for surface mount applications, it utilizes a concave package configuration in the 1210 (3225 Metric) footprint. The component operates with a maximum voltage rating of 6V and features a hold current (Ih) of 4A. It serves as a circuit protection device that automatically resets after tripping due to overcurrent conditions.
Feature Summary
- Polymeric construction enables automatic reset functionality following fault clearance
- Concave surface mount design facilitates stable PCB placement
- Integrated thermal response mechanism protects against overcurrent events
Applications
- Portable electronic device circuit protection
- Low-voltage power supply input protection
- Data line surge suppression in consumer electronics
Procurement Notes
Verify the specific ordering suffix matches the required hold current and voltage ratings. Confirm RoHS compliance status through official manufacturer documentation. Ensure the concave package variant aligns with automated pick-and-place equipment capabilities. Cross-reference datasheet electrical characteristics against system requirements before finalizing procurement orders.
Selection Notes
Evaluate the maximum operating voltage and trip current limits against the target circuit parameters. Consider the physical dimensions of the 1210 package for board space constraints. Assess the thermal environment to ensure proper derating under continuous load conditions. Verify compatibility with reflow soldering profiles specified in the manufacturing guidelines.
Part Context
This component belongs to the MF-USML series of resettable fuses from Bourns Inc. The series offers various hold current options within a compact surface mount form factor. These devices provide reusable overcurrent protection alternatives to traditional one-time fuses in low-voltage applications.
Replacement Considerations
Consult official Bourns substitution guides for compatible part numbers. Verify equivalent voltage ratings and hold current specifications when selecting alternatives. Ensure package dimensions match existing footprints to avoid mechanical integration issues.
