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MF-USMD075-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 750MA 1210
- Series：Multifuse®, MF-USMD
- 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：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric)
- Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.024" (0.62mm)
- Lead Spacing：-
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Overview
The Bourns MF-USMD075-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse series. It provides overcurrent protection in a compact 1210 package. The device maintains a hold current of 0.75 A and trips at 1.5 A. It supports a maximum voltage of 6 VDC and withstands fault currents up to 40 A. Initial resistance is typically 1.5 Ohms. It operates within a temperature range of -40°C to +85°C.
Feature Summary
- Surface-mount polymer PTC technology for automatic circuit recovery
- Compact 1210 footprint for space-constrained PCB layouts
- High fault current rating for robust surge protection
Applications
- Portable electronic devices
- Consumer electronics power lines
- Peripheral interface circuits
Procurement Notes
Verify the specific suffix 'X' or absence thereof against the manufacturer's official datasheet, as packaging variations exist within the series. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the selected variant matches the required voltage and current ratings for the target application circuit.
Selection Notes
Select this component for low-voltage DC circuits requiring compact overcurrent protection. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range. Consider the initial resistance value when calculating voltage drop in sensitive signal paths. Verify compatibility with standard SMT reflow profiles during assembly.
Part Context
This part belongs to the Bourns Multifuse family of resettable fuses. These components utilize conductive polymer technology to provide reusable protection against overcurrent conditions. The series offers various packages and ratings to suit different industrial and consumer applications, replacing traditional one-time fuses in many designs.
Replacement Considerations
MF-USMD075: Identical electrical specifications but may differ in tape-and-reel packaging configuration. MF-USMD075K: Higher voltage rating variant; verify if the increased rating affects spatial constraints.
