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MF-R900-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 9A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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-R900-2 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse designed for overcurrent protection in electronic circuits. It features a holding current of 9.0 A and a trip current of 18.0 A, operating at a maximum voltage of 30 VDC. The device has a maximum fault current rating of 100 A and an initial resistance of 2.5 mΩ. It operates within a temperature range of -40°C to +85°C and dissipates 1 W of power. The component measures 16.7 mm in length, 11.7 mm in diameter, and utilizes a 5.1 mm lead spacing.
Feature Summary
- Radial leaded construction with cured flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements
- Polymeric PTC technology provides automatic reset functionality after fault conditions clear
- RoHS compliant design suitable for environmentally regulated manufacturing processes
Applications
- Overcurrent protection for portable computers and peripheral devices
- Protection circuits for consumer electronics and battery packs
- Industrial control systems requiring resettable thermal fuses
Procurement Notes
Verify the specific suffix and series designation against the official Bourns datasheet to ensure correct voltage and current ratings. Confirm RoHS compliance status and UL recognition numbers match project requirements. Check for any recent product change notifications or end-of-life notices from the manufacturer before finalizing procurement plans.
Selection Notes
Select this component when high holding current near 9 A is required alongside a low maximum voltage of 30 VDC. Ensure the application environment stays within the specified -40°C to +85°C operating range. Verify that the radial lead pitch matches the PCB footprint and that the 100 A maximum fault current capability exceeds potential surge levels in the circuit.
Part Context
This part belongs to the Bourns MF-R/90 series of resettable fuses. These components are widely used in power supply lines where manual fuse replacement is impractical. The series offers various current ratings while maintaining consistent physical dimensions and mounting styles for standardized design integration across different product lines.
Replacement Considerations
Consult the official Bourns replacement guide for direct equivalents. Verify that substitute parts match the 9.0 A holding current, 30 VDC rating, and radial lead configuration. Ensure alternative components meet the same UL 94V-0 insulation and RoHS standards.
