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MF-USHT050KX-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 500MA 1210
- Series：Multifuse®, MF-USHT
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：500 mA
- Current - Trip (It)：2.5 A
- Current - Max：20 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：300 mOhms
- Resistance - Post Trip (R1) (Max)：1.6 Ohms
- Operating Temperature：-40°C ~ 125°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.126" L x 0.100" W (3.20mm x 2.55mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.033" (0.85mm)
- Lead Spacing：-
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Overview
The Bourns MF-USHT050KX-2 is a surface-mount polymer PTC resettable fuse from the high-temperature MF-USHT series. It features a 1210 (3225 metric) package designed for PCB mounting via SMD/SMT termination. Key electrical parameters include a hold current of 500 mA, trip current of 1 A, and maximum voltage rating of 36 V. The device has a maximum rated current of 20 A and an initial resistance of 5 ohms. It operates within a temperature range of -40°C to +125°C.
Feature Summary
- High-temperature polymer construction for reliable circuit protection in demanding thermal environments
- Surface-mount design compatible with automated assembly processes
- Self-resetting functionality eliminates the need for manual fuse replacement after fault clearance
Applications
- Overcurrent protection for portable electronic devices
- Protection circuits in automotive electronics
- Industrial equipment power line safeguarding
Procurement Notes
Verify the specific suffix against official Bourns documentation to confirm exact electrical tolerances and packaging specifications. Ensure the component meets RoHS requirements if mandated by your project standards. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before procurement.
Selection Notes
Select this component when applications require overcurrent protection capable of withstanding elevated operating temperatures up to 125°C. The 1210 footprint suits space-constrained designs needing surface-mount integration. Ensure the system's normal operating current remains below the 500 mA hold current while accounting for potential inrush currents that must stay below the 1 A trip threshold.
Part Context
This part belongs to the Bourns MF-USHT series, which expands the manufacturer's portfolio of high-temperature PPTC resettable fuses. The series is engineered for robust transient voltage suppression and current limiting in automotive and industrial sectors. The MF-USHT designation indicates specialized polymer technology optimized for high-reliability performance under thermal stress.
Replacement Considerations
Consult official Bourns substitution guides for direct equivalents. Verify that any alternative maintains the 1210 package dimensions, 36 V maximum voltage rating, and 125°C operational temperature limit to ensure functional compatibility.
