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MF-USML450/6-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 4.5A 1210
- Series：Multifuse®, MF-USML/X
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：4.5 A
- Current - Trip (It)：9:00 AM
- Current - Max：50 A
- Time to Trip：2 s
- Resistance - Initial (Ri) (Min)：2 mOhms
- Resistance - Post Trip (R1) (Max)：14 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.101" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.047" (1.20mm)
- Lead Spacing：-
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Overview
The MF-USML450/6-2 is a high-temperature PPTC resettable fuse from the Bourns USHT series, designed for robust circuit protection in demanding environments. It operates within an extended temperature range and provides reliable overcurrent safeguarding. This component integrates a thick film resistive layer on a ceramic substrate with electroplated tin terminations, ensuring compatibility with standard soldering processes while maintaining structural integrity under thermal stress.
Feature Summary
- High-temperature polymeric positive temperature coefficient construction
- Resettable overcurrent protection mechanism
- Thick film resistive element on ceramic substrate
- Electroplated tin outer terminations for board soldering
Applications
- Automotive electronics circuits
- Industrial equipment power lines
- Telecommunications infrastructure
- Consumer electronic devices
Procurement Notes
Verify the specific part number against official Bourns documentation to confirm availability status. Check for any RoHS compliance details or end-of-life notices directly from the manufacturer's current product listings. Ensure that the ordering suffix matches the required package and rating specifications before finalizing procurement orders.
Selection Notes
Select this component when high-temperature stability and resettable protection are required. Consider the operating temperature range and holding current requirements relative to the application's normal load. Verify compatibility with the intended soldering process due to the thick film construction and termination type specified for this series.
Part Context
This part belongs to the MF-USHT series of high-temperature PPTC resettable fuses manufactured by Bourns. The series is characterized by its ability to withstand elevated temperatures while providing effective circuit protection. It serves as a critical safety component in systems where traditional fuses may not offer sufficient thermal resilience or reset capability.
Replacement Considerations
Consult the official Bourns replacement guide for confirmed substitute part numbers if this item is discontinued. Do not assume generic cross-model compatibility without verifying electrical parameters and physical dimensions against the original specification sheet.
