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MF-USHT125KX/12-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 12V 1.25A 1210
- Series：Multifuse®, MF-USHT
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：12V
- Current - Hold (Ih) (Max)：1.25 A
- Current - Trip (It)：3.75 A
- Current - Max：40 A
- Time to Trip：1 s
- Resistance - Initial (Ri) (Min)：30 mOhms
- Resistance - Post Trip (R1) (Max)：300 mOhms
- Operating Temperature：-40°C ~ 125°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.135" L x 0.110" W (3.43mm x 2.80mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.041" (1.05mm)
- Lead Spacing：-
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Overview
The Bourns MF-USHT125KX/12-2 is a high-temperature polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-USHT series. Designed for robust circuit protection, this component operates reliably in demanding thermal environments. It functions as a self-resetting overcurrent protector, offering a durable alternative to traditional one-time fuses in applications requiring sustained performance under elevated temperatures.
Feature Summary
- High-temperature operational capability suitable for demanding thermal environments
- Self-resetting functionality eliminates the need for manual replacement after fault conditions
- Polymeric positive temperature coefficient construction provides reliable overcurrent protection
Applications
- Automotive electronics systems
- Industrial control circuits
- Power supply protection modules
Procurement Notes
Verify the specific suffix and voltage rating against the official Bourns datasheet to ensure compatibility with the target circuit design. Confirm that the component meets all required environmental certifications and temperature ratings for the intended application environment before finalizing procurement decisions.
Selection Notes
Select this component when the application requires overcurrent protection in high-temperature environments where standard PPTC devices may fail. Ensure the holding current and trip characteristics align with the system's normal operating parameters and fault tolerance requirements to prevent nuisance tripping or inadequate protection.
Part Context
This part belongs to the MF-USHT series of high-temperature PPTC resettable fuses manufactured by Bourns Inc. The series is engineered to provide reliable circuit protection in automotive and industrial sectors where components are exposed to extreme thermal stress and harsh operating conditions.
Replacement Considerations
Consult the official Bourns substitution guide for verified equivalent parts. Do not assume cross-compatibility with other manufacturers' high-temperature PPTC devices without verifying electrical and physical specifications.
