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MF-RX110/72-0
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Product Detailed Parameters
- Description：PTC RESET FUSE 72V 1.1A RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：1.1 A
- Current - Trip (It)：2.2 A
- Current - Max：40 A
- Time to Trip：8.2 s
- Resistance - Initial (Ri) (Min)：150 mOhms
- Resistance - Post Trip (R1) (Max)：380 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.427" L x 0.122" W (10.84mm x 3.10mm)
- Height - Seated (Max)：0.662" (16.84mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX110/72-0 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. It features a hold current of 1.1 A and a trip current of 2.2 A, with a maximum voltage rating of 72 VDC. The device has a maximum rated current of 40 A and an initial resistance of 250 mOhms. It operates within a temperature range of -40°C to +85°C and has a lead spacing of 5.1 mm. The component diameter is 10.84 mm.
Feature Summary
- Provides automatic circuit protection through reversible tripping action upon overcurrent or overheating events.
- Utilizes polymeric technology to maintain low resistance during normal operation while increasing impedance significantly during fault conditions.
Applications
- Overcurrent protection for consumer electronic devices
- Protection circuits in office equipment
- Industrial system control boards
- Telecommunications network interfaces
Procurement Notes
Verify the specific hold current and voltage ratings against the target circuit requirements before integration. Confirm that the radial lead configuration and 5.1 mm spacing align with the printed circuit board layout. Ensure the operating temperature range meets the environmental specifications of the final assembly. Cross-reference the datasheet for precise thermal derating curves.
Selection Notes
Select this component when a 1.1 A hold current and 72 VDC maximum voltage are required for circuit protection. Consider the 250 mOhms initial resistance for power loss calculations. Evaluate the physical dimensions and lead spacing for mechanical fitment. Compare against other series members if higher current handling or different voltage ratings are needed.
Part Context
This part belongs to the Bourns Multifuse MF-RX/72 series of PTC resettable fuses. These components are designed for PCB mounting and offer a cost-effective alternative to traditional one-time fuses. The series provides various current ratings to suit different application needs while maintaining consistent physical form factors for easy design-in.
Replacement Considerations
Consult official Bourns documentation for verified substitute part numbers. Do not assume cross-compatibility with other manufacturers' PTC devices without rigorous testing. Verify that any replacement maintains the same voltage, current, and thermal characteristics.
