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MF-SM300-2-99
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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)
- 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 Bourns MF-SM300-2-99 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse from the Multifuse SM Series. Designed for overcurrent protection, this component utilizes a conductive polymer composite that increases resistance significantly upon excessive current flow, effectively interrupting the circuit. It features a compact SMD package suitable for automated assembly and space-constrained layouts. The device provides robust protection against short circuits and overloads in various electronic applications.
Feature Summary
- Polymer PTC technology for automatic reset after fault clearance
- Compact surface-mount design for high-density PCB layouts
- Eliminates need for traditional replaceable fuses
- Provides consistent performance across varying ambient temperatures
Applications
- Portable communication devices
- Computing and data storage systems
- Consumer electronics power inputs
- Industrial control circuits
Procurement Notes
Verify the specific suffix '99' against official Bourns documentation to confirm tape-and-reel packaging specifications and quantity per reel. Ensure the part number matches the required hold current and trip characteristics for your circuit design. Cross-reference with the latest datasheet to confirm RoHS compliance and material declarations before finalizing procurement orders.
Selection Notes
Select this component based on the required hold current and maximum voltage ratings for the target application. Consider the physical footprint constraints of the PCB layout when choosing between different Multifuse series options. Evaluate the thermal environment to ensure the device operates within its specified temperature range without premature tripping or failure to trip under fault conditions.
Part Context
This part belongs to the Multifuse SM Series, which offers low ohmic surface-mount PPTC devices. These components are designed to provide cost-effective overcurrent protection in a small form factor. The series is widely used in applications requiring reliable protection without the maintenance associated with traditional fuses, supporting both industrial and consumer electronics markets.
Replacement Considerations
Consult official Bourns substitution guides for direct replacements. Verify that any substitute part matches the original hold current, trip current, and voltage ratings. Ensure the replacement component fits the existing PCB footprint and meets all regulatory certifications required for the end product.
