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MF-RX020/72-0
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Product Detailed Parameters
- Description：PTC RESET FUSE 72V 200MA RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：200 mA
- Current - Trip (It)：400 mA
- Current - Max：40 A
- Time to Trip：2.2 s
- Resistance - Initial (Ri) (Min)：1.5 Ohms
- Resistance - Post Trip (R1) (Max)：4.4 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- 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)：0.500" (12.70mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX020/72-0 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-RX/72 series. It features a maximum voltage rating of 72 VDC and a hold current of 200 mA. The trip current is specified at 400 mA, with a maximum fault current capacity of 40 A. The device operates within a temperature range of -40°C to +85°C and has a typical resistance of 3.9 Ohms.
Feature Summary
- Provides automatic circuit protection through self-resetting functionality after fault conditions clear
- Offers high fault current interruption capability for robust overcurrent safeguarding
- Utilizes a compact radial leaded package suitable for standard PCB mounting
Applications
- Portable electronic devices requiring overcurrent protection
- Battery-powered equipment circuits
- Communication ports and interface lines
Procurement Notes
Verify the specific hold and trip currents against the official datasheet before integration, as values are critical for circuit design. Confirm that the 72V DC rating aligns with your system's maximum operating voltage. Ensure the physical dimensions and lead spacing match your PCB footprint requirements. Check for RoHS compliance status if required by your manufacturing standards.
Selection Notes
Select this component when a low-current, high-voltage PTC fuse is needed for radial PCB applications. Compare the 200 mA hold current against your normal operating load to ensure reliable performance without nuisance tripping. Consider the 3.9 Ohm resistance impact on signal integrity or power loss in sensitive low-voltage lines. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range.
Part Context
This part belongs to the Bourns MF-RX/72 series of resettable fuses, designed for general-purpose overcurrent protection. The series offers various current ratings within a standardized voltage platform. These components serve as alternatives to traditional fusible links, providing reusable protection in consumer electronics and industrial control systems where maintenance access is limited.
Replacement Considerations
Direct substitutes include other MF-RX020/72 variants with identical electrical characteristics but different packaging options, such as tape-and-reel configurations. Verify that any replacement maintains the same 72V rating and 200 mA hold current to ensure circuit compatibility.
