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MF-RHT450-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 16V 4.5A RADIAL
- Series：Multifuse®, MF-RHT
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：16V
- Current - Hold (Ih) (Max)：4.5 A
- Current - Trip (It)：7.8 A
- Current - Max：100 A
- Time to Trip：3 s
- Resistance - Initial (Ri) (Min)：22 mOhms
- Resistance - Post Trip (R1) (Max)：54 mOhms
- Operating Temperature：-40°C ~ 125°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.409" L x 0.118" W (10.40mm x 3.00mm)
- Height - Seated (Max)：0.614" (15.60mm)
- Thickness (Max)：-
- Lead Spacing：0.114" (2.90mm)
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Overview
The Bourns MF-RHT450-2 is an automotive-grade PTC resettable fuse designed for high-temperature overcurrent protection. It features a maximum operating voltage of 16V and a hold current of 45A, with a trip current of 90A. The device exhibits a minimum initial resistance of 22 mOhms and a maximum post-trip resistance of 54 mOhms. Rated for continuous operation between -40°C and 125°C, it utilizes a radial disc package with a lead spacing of 0.114 inches (2.90mm).
Feature Summary
- Provides reliable overcurrent surge protection in demanding high-temperature environments.
- Automotive-grade construction ensures compliance with strict industry reliability standards.
- Radial disc packaging facilitates straightforward integration into circuit boards.
Applications
- Automotive electronic circuit protection
- High-temperature industrial equipment safeguarding
- Consumer electronics overcurrent prevention
Procurement Notes
Verify the specific datasheet version to confirm automotive qualification status, as Bourns explicitly identifies suitable products in documentation sections. Ensure the selected variant matches the required thermal and electrical ratings for the target application environment. Cross-reference official component identifiers to avoid confusion with similar series models.
Selection Notes
Select this component when applications require robust overcurrent protection within a 16V system. The 45A hold current suits moderate load scenarios, while the high-temperature rating supports harsh operational conditions. Consider the radial form factor for through-hole mounting requirements and verify that the trip time characteristics align with the circuit's fault tolerance needs.
Part Context
This part belongs to the Bourns Multifuse RHT series, specialized for high-temperature performance. The series expands upon standard PPTC capabilities to address automotive and industrial challenges. It complements other Bourns circuit protection solutions by offering resettable functionality where traditional fuses are impractical.
Replacement Considerations
Consult official substitution guides for compatible alternatives within the Multifuse family. Verify that any substitute maintains equivalent voltage, current, and temperature specifications to ensure circuit integrity and safety compliance.
