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MF-SM050-2-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 500MA 2SMD
- Series：Multifuse®, MF-SM
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：60V
- Current - Hold (Ih) (Max)：500 mA
- Current - Trip (It)：1:00 AM
- Current - Max：40 A
- Time to Trip：4 s
- Resistance - Initial (Ri) (Min)：350 mOhms
- Resistance - Post Trip (R1) (Max)：1.4 Ohms
- 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)：0.125" (3.18mm)
- Lead Spacing：-
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Overview
The MF-SM050-2-99 is a polymeric PTC resettable fuse manufactured by Bourns Inc. It features a holding current (Ih) of 500 mA and a maximum voltage rating of 60V. The device is designed for surface mount applications with a 2-SMD package configuration. It has a maximum trip current (It) of 1.1 A and a maximum fault current rating of 40 A. The component complies with AEC-Q200 Rev-C stress test qualification for automotive applications.
Feature Summary
- Polymeric positive temperature coefficient construction for automatic circuit protection
- Surface mount design suitable for automated assembly processes
- Compliance with AEC-Q200 Rev-C automotive stress test qualifications
Applications
- Automotive electronic circuits requiring AEC-Q200 compliance
- Overcurrent protection for low-voltage DC lines
- Portable electronics and consumer devices
Procurement Notes
Verify the specific suffix -99 against the manufacturer's official documentation to confirm tape and reel packaging specifications. Confirm RoHS compliance status as indicated in current datasheets. Check obsolescence notices, as distribution sources may list this part as discontinued or obsolete. Ensure the requested quantity matches the standard shipping pack size defined in the latest product release notes.
Selection Notes
Select this component when a 500 mA holding current and 60V maximum voltage are required for circuit protection. Consider the 2-SMD package dimensions for PCB layout constraints. Verify that the 40 A maximum fault current rating exceeds the potential short-circuit currents in the target application. Ensure the operating temperature range aligns with the environmental conditions of the end-use device.
Part Context
This part belongs to the Bourns MF-SM series of surface-mount polymeric PTC resettable fuses. The series provides overcurrent protection for various electronic applications. The MF-SM050-2 variant specifically denotes the 500 mA holding current and 60V rating within this family. The -99 suffix typically indicates specific packaging or marking variations.
Replacement Considerations
Direct substitutes include other Bourns MF-SM series parts with matching electrical ratings. Cross-reference with equivalent products from other manufacturers offering 500 mA Ih and 60V Vmax in 2-SMD packages. Verify pinout compatibility and thermal characteristics before substitution.
