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MF-S350
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 3.5A STRAP
- Series：Multifuse®, MF-S
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：3.5 A
- Current - Trip (It)：6.3 A
- Current - Max：100 A
- Time to Trip：3 s
- Resistance - Initial (Ri) (Min)：17 mOhms
- Resistance - Post Trip (R1) (Max)：40 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：User Defined
- Package / Case：Strap
- Size / Dimension：1.185" L x 0.522" W (30.10mm x 13.25mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.043" (1.10mm)
- Lead Spacing：-
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Overview
The MF-S350 is a PTC resettable fuse from the Bourns MF-S series, designed for surface mount applications. It features a maximum voltage rating of 30V DC and a holding current of 3.5A. The device trips at 6.3A and supports a maximum fault current of 100A. Its resistance is 31mΩ, with an operating temperature range of -40°C to +85°C.
Feature Summary
- Provides automatic circuit protection through positive temperature coefficient polymer technology
- Offers high reliability in surface mount configurations for compact designs
- Delivers robust surge protection against overcurrent conditions
Applications
- Portable electronic devices requiring compact overcurrent protection
- Consumer electronics circuits needing surface mount safety components
- Automotive infotainment systems requiring reliable thermal cutoff
Procurement Notes
Verify the specific package variant and lead configuration when sourcing, as the MF-S series includes both axial and surface mount options. Confirm that the selected component matches the required 30V DC rating and 3.5A hold current for your specific circuit design. Ensure compliance with RoHS directives if applicable to your manufacturing standards.
Selection Notes
Select this component based on its 3.5A holding current and 30V maximum voltage rating. Consider the 31mΩ resistance for power dissipation calculations. Verify the physical footprint requirements for surface mount installation. Ensure the trip current of 6.3A aligns with the circuit's normal operating limits to prevent nuisance tripping during transient loads.
Part Context
This part belongs to the Bourns MF-S series of PTC resettable fuses. The series provides various current ratings and voltage options for different protection needs. The MF-S350 specifically targets applications requiring a 3.5A hold current in a surface mount format, distinguishing it from the radial leaded MF-RHS variants.
Replacement Considerations
Direct substitutes include other Bourns MF-S series parts with matching electrical ratings. Cross-reference with equivalent PTC fuses from manufacturers like Littelfuse or EAO, ensuring identical hold current, trip current, and voltage specifications are maintained for circuit compatibility.
