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MF-SM300-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 3A 2SMD
- Series：Multifuse®, MF-SM
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：3:00 AM
- Current - Trip (It)：6:00 AM
- Current - Max：100 A
- Time to Trip：35 s
- Resistance - Initial (Ri) (Min)：15 mOhms
- Resistance - Post Trip (R1) (Max)：48 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：2-SMD
- Size / Dimension：0.287" L x 0.214" W (7.31mm x 5.44mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.118" (3.00mm)
- Lead Spacing：-
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Overview
The MF-SM300-2 is a surface mount polymeric positive temperature coefficient (PPTC) resettable fuse from the Bourns MF-SM series. Designed for high-density applications, it utilizes a 2920 (7351 Metric) package to provide overcurrent protection in low-voltage circuits. The device features a voltage rating of 6 VDC and a holding current of 3 A, with a trip current of 6 A. It offers a maximum trip time of 35 seconds and supports a maximum fault current of 100 A. Initial resistance is typically 15 mOhms, while post-trip resistance remains below 48 mOhms.
Feature Summary
- Compliant with AEC-Q200 Rev-C stress test qualification for automotive passive components
- Surface mount design suitable for automated assembly processes
- Resettable functionality eliminates the need for manual replacement after fault conditions
Applications
- Automotive electronic circuit protection
- Low-voltage power supply overcurrent protection
- Portable electronics battery protection
Procurement Notes
Verify that the specific part number matches the required voltage and current ratings for your application. Confirm compliance with AEC-Q200 standards if automotive use is intended. Ensure the surface mount footprint corresponds to the 2920 package dimensions during PCB layout. Check datasheet specifications for thermal derating requirements under varying ambient temperatures.
Selection Notes
Select this component when a compact, resettable overcurrent solution is needed for 6V DC systems. The 3A holding current suits moderate load protection needs. Consider the 2920 package size for board space constraints. Evaluate the 100A maximum fault current capability against potential surge scenarios in the target circuit design.
Part Context
This component belongs to the Bourns MF-SM series of PPTC resettable fuses. These devices are engineered for surface mount technology, offering reliability in space-constrained environments. The series supports various current ratings within a standardized package family, facilitating consistent design practices across different product lines.
Replacement Considerations
Cross-reference with other MF-SM series variants for different current ratings. Verify compatibility with equivalent AEC-Q200 qualified PPTC fuses from other manufacturers if supply chain adjustments are necessary.
