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MF-RX110/72-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 72V 1.1A RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 MF-RX110/72-2 is a polymeric positive temperature coefficient (PPTC) resettable fuse from the Bourns Multifuse MF-RX/72 series. Designed for through-hole PCB mounting, this radial leaded component provides overcurrent protection with a hold current of 1.1 A and a trip current of 2.2 A. It operates at a maximum voltage of 72 VDC and can withstand fault currents up to 40 A. The device features a low resistance of 250 mΩ and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Provides automatic circuit recovery after fault conditions clear without manual replacement
- Offers high fault current interruption capability up to 40 A for robust protection
- Features compact radial leaded construction suitable for standard PCB layouts
Applications
- Portable electronic devices requiring overcurrent protection
- Battery packs and power supply circuits
- Peripheral equipment interfaces
Procurement Notes
Verify the specific suffix designation against official Bourns documentation to confirm packaging type and compliance status. Ensure the selected variant matches the required hold current and voltage ratings for the target application circuit. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before procurement.
Selection Notes
Select this component when a 1.1 A hold current and 72 VDC rating are required for radial PTC applications. Consider the 250 mΩ initial resistance for power loss calculations in sensitive circuits. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range during normal and fault conditions.
Part Context
This part belongs to the Bourns Multifuse MF-RX/72 series of polymeric resettable fuses. The series offers various hold current options within a standardized 72 VDC voltage rating platform. These components utilize polymer technology to provide reliable, reusable overcurrent protection for consumer electronics and industrial applications.
Replacement Considerations
Consult official Bourns substitution guides for verified alternatives. Generic PTC fuses may not match the specific tripping characteristics or physical dimensions. Verify that any substitute maintains the same voltage rating, hold current, and package style.
