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MF-USHT035KX-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 350MA 1210
- Series：Multifuse®, MF-USHT
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：350 mA
- Current - Trip (It)：1.75 A
- Current - Max：20 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：400 mOhms
- Resistance - Post Trip (R1) (Max)：2.2 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 MF-USHT035KX-2 is a polymeric PTC resettable fuse from Bourns Inc., designed for surface mount applications in the 1210 (3225 Metric) package. It features a hold current of 350 mA and a maximum voltage rating of 30 V. The device has a trip current of 1.75 A and a maximum rated current of 20 A. Initial resistance is at least 400 mOhms, with a post-trip resistance not exceeding 2.2 Ohms. It operates within a temperature range of -40°C to 125°C and meets AEC-Q200 automotive qualification standards.
Feature Summary
- High-temperature capability suitable for demanding thermal environments
- Automotive-grade reliability certified under AEC-Q200 standards
- Surface-mount design optimized for automated PCB assembly processes
Applications
- Automotive electronic circuit protection
- Overcurrent protection in high-temperature industrial systems
- Portable electronics requiring compact surface-mount fuses
Procurement Notes
Verify that the specific part number matches the required electrical parameters, including the 350 mA hold current and 30 V rating. Confirm the AEC-Q200 qualification status if automotive application compliance is mandatory. Ensure the 1210 package dimensions align with the printed circuit board footprint requirements. Check datasheet revisions for any updates to resistance values or temperature ratings before finalizing component selection.
Selection Notes
Select this component when high-temperature operation up to 125°C is required alongside standard overcurrent protection. The 1210 package offers a balance between current handling capacity and board space efficiency. Consider the post-trip resistance value for power dissipation calculations in the protected circuit. Ensure the trip current of 1.75 A provides adequate margin above the normal operating current while ensuring timely fault response.
Part Context
This device belongs to the MF-USHT series of high-temperature PPTC resettable fuses by Bourns Inc. The series is engineered for robust performance in challenging thermal conditions. It complements other Bourns protection components by offering reliable, self-resetting functionality without manual intervention after a fault condition clears.
Replacement Considerations
The MF-NSHT035KX-2 is a related high-temperature variant with similar specifications but may differ in resistance characteristics. Verify exact parameter compatibility before substitution. No other direct substitute part numbers are confirmed in public documentation.
