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MF-S420
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 4.2A STRAP
- Series：Multifuse®, MF-S
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：4.2 A
- Current - Trip (It)：7.6 A
- Current - Max：100 A
- Time to Trip：6 s
- Resistance - Initial (Ri) (Min)：12 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：1.240" L x 0.522" W (31.50mm x 13.25mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.043" (1.10mm)
- Lead Spacing：-
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Overview
The Bourns MF-S420 is a bulk self-resettable fuse belonging to the MF-S series, designed for overcurrent protection in electronic circuits. It utilizes Positive Temperature Coefficient (PPTC) technology to provide reliable circuit safeguarding without permanent damage during fault conditions.
Feature Summary
- Self-resetting functionality eliminates the need for manual replacement after an overcurrent event.
- Positive Temperature Coefficient (PPTC) construction ensures rapid response to excessive current flow.
- Bulk packaging format supports through-hole mounting and general-purpose circuit integration.
Applications
- General electronic circuit overcurrent protection
- Consumer electronics power supply lines
- Industrial control system safeguarding
Procurement Notes
Verify the specific datasheet for the MF-S420 to confirm critical electrical parameters such as hold current, trip current, and maximum voltage ratings required for your design. Ensure the component meets all necessary safety certifications and RoHS compliance standards applicable to your target market before finalizing procurement.
Selection Notes
Select this component based on the circuit's normal operating current and potential fault levels. The MF-S420 is suitable for applications requiring resettable protection where space constraints allow for bulk packages. Confirm thermal management requirements and ambient temperature ranges to ensure proper performance within the specified operational limits.
Part Context
This part belongs to the Bourns MF-S series of PPTC resettable fuses. These components are widely used across various industries for protecting sensitive electronics from overcurrent conditions. The series offers a range of current ratings and package styles to accommodate diverse design needs.
Replacement Considerations
Consult official Bourns documentation for verified substitute part numbers with equivalent electrical characteristics. Do not assume interchangeability with other brands or series without validating hold current, trip current, and voltage ratings against the original design specifications.
