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MF-R900
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 9A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：9:00 AM
- Current - Trip (It)：18 A
- Current - Max：40 A
- Time to Trip：20 s
- Resistance - Initial (Ri) (Min)：5 mOhms
- Resistance - Post Trip (R1) (Max)：20 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.953" L x 0.118" W (24.20mm x 3.00mm)
- Height - Seated (Max)：1.295" (32.90mm)
- Thickness (Max)：-
- Lead Spacing：0.402" (10.20mm)
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Overview
The Bourns MF-R900 is a radial leaded PPTC resettable fuse designed for circuit protection. It features a maximum voltage rating of 30V and a trip current of 18A. The device maintains a hold current of 9.0A and has a maximum rated current of 9.0A. Its initial resistance is limited to a maximum of 2.5 milliohms. The component operates within a temperature range from -40°C to +85°C.
Feature Summary
- Provides automatic circuit recovery after fault conditions without manual replacement
- Offers high current handling capability with low impedance characteristics
- Utilizes polymer positive temperature coefficient technology for reliable thermal response
Applications
- Overcurrent protection in power supply circuits
- Protection for portable electronic devices
- Battery pack safeguarding systems
Procurement Notes
Verify the specific suffix designation, such as AP, to confirm packaging configuration and compliance status. Ensure that the selected variant matches the required lead spacing and mounting style for the target PCB layout. Cross-reference the datasheet parameters against the application's thermal environment to guarantee proper hold current performance under operating conditions.
Selection Notes
Select this component based on the system's maximum operating voltage not exceeding 30V. Evaluate the expected load current to ensure it remains below the 9.0A hold current threshold during normal operation. Consider the ambient temperature range to verify that the device will not trip prematurely or fail to reset within the specified -40°C to +85°C limits.
Part Context
This part belongs to the MF-R series of multifuse resettable fuses manufactured by Bourns. The series provides robust overcurrent protection solutions using polymeric PTC materials. These components are engineered to replace traditional fusible links in various electronic applications requiring reusable protection mechanisms.
Replacement Considerations
Direct substitutes include variants within the same MF-R family with compatible electrical ratings. Verify lead form and package dimensions before substitution to ensure mechanical fit.
