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MF-RX030/72-AP-17
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Product Detailed Parameters
- Description：PTC RESETTABLE 0.3A 72V RADIAL L
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Tape & Box (TB)
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：300 mA
- Current - Trip (It)：600 mA
- Current - Max：40 A
- Time to Trip：3 s
- Resistance - Initial (Ri) (Min)：760 mOhms
- Resistance - Post Trip (R1) (Max)：2.1 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.291" Dia x 0.122" T (7.40mm x 3.10mm)
- Height - Seated (Max)：0.528" (13.40mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX030/72-AP-17 is a polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. It features a hold current of 300 mA and a trip current of 600 mA, rated for a maximum voltage of 72 VDC. The device has a typical resistance of 1.36 Ohms and a maximum fault current rating of 40 A. It operates within a temperature range of -40°C to +85°C and utilizes a radial leaded package with a 5.1 mm lead spacing.
Feature Summary
- Provides automatic circuit protection against overcurrent conditions through self-resetting functionality
- Utilizes polymeric PTC technology for real-time thermal monitoring and response
- Designed for PCB mounting with radial leads for standard through-hole integration
Applications
- Overcurrent protection in portable electronic devices
- Protection circuits for battery-powered equipment
- Interface protection for data and signal lines
Procurement Notes
Verify that the suffix AP-17 corresponds to the specific Ammo Pack packaging configuration required for automated assembly processes. Confirm that the 72V DC rating aligns with the system's maximum operating voltage under all transient conditions. Ensure the 300 mA hold current meets the continuous load requirements without nuisance tripping during normal operation.
Selection Notes
Select this component when a low holding current near 300 mA is required for sensitive circuit protection. The 72V rating suits low-voltage applications where higher voltage fuses are unnecessary. Consider the physical dimensions and lead spacing for PCB layout compatibility. Evaluate the thermal environment to ensure the +85°C maximum operating temperature is sufficient for the application.
Part Context
This part belongs to the Bourns Multifuse MF-RX/72 series of resettable fuses. The series offers various hold currents and voltage ratings tailored for different circuit protection needs. The MF-RX designation indicates a radial leaded form factor suitable for through-hole mounting on printed circuit boards.
Replacement Considerations
Direct substitutes include other MF-RX/72 series variants with identical electrical parameters but different packaging, such as MF-RX030/72-0. Cross-reference datasheets to confirm matching hold current, trip current, and voltage ratings before substitution.
