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MF-USMF075-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 750MA 1210
- Series：Multifuse®, MF-USMF
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：750 mA
- Current - Trip (It)：1.5 A
- Current - Max：40 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：70 mOhms
- Resistance - Post Trip (R1) (Max)：450 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.033" (0.85mm)
- Lead Spacing：-
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Overview
The Bourns MF-USMF075-2 is a surface-mount polymer PTC resettable fuse from the Multifuse USMF series, designed for circuit protection. It features a hold current of 750 mA and a trip current of 1.5 A. The device supports a maximum voltage of 24 VDC and has a maximum rated current of 40 A. Its initial resistance is typically 110 mOhms, rising to a maximum of 450 mOhms after tripping. Packaged in an 1812 (4532 metric) footprint, it operates within a temperature range of -40°C to +85°C.
Feature Summary
- Utilizes polymer technology for automatic reset functionality following fault clearance
- Provides overcurrent protection through positive temperature coefficient characteristics
- Engineered for compact surface-mount integration on printed circuit boards
Applications
- Portable electronic device power line protection
- USB port surge and overcurrent safeguarding
- Battery pack circuit protection
- Automotive infotainment system wiring protection
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number with official Bourns documentation. Confirm that the specific suffix matches the required electrical ratings and package dimensions. Ensure compliance with relevant safety certifications such as UL or TUV before integration into final assemblies.
Selection Notes
Select this component when a low-profile surface-mount solution is required for moderate current applications. The 1812 package offers a balance between current handling capacity and board space efficiency. Consider the thermal environment, as ambient temperature affects the hold current rating significantly during operation.
Part Context
This part belongs to the Multifuse USMF series, which expands Bourns' portfolio of high-reliability resettable fuses. The series targets applications requiring robust protection against transient overcurrent events while maintaining a small physical footprint suitable for modern miniaturized electronics.
Replacement Considerations
Direct substitutes include other 1812 package PPTC fuses with matching 750 mA hold current and 24 VDC voltage ratings. Verify that alternative components meet the same trip current and resistance specifications to ensure equivalent circuit performance.
