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MF-RX025/72-0-17
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Product Detailed Parameters
- Description：PTC RESETTABLE 0.25A 72V RADIAL
- Series：Multifuse®, MF-RX/72
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：72V
- Current - Hold (Ih) (Max)：250 mA
- Current - Trip (It)：500 mA
- Current - Max：40 A
- Time to Trip：2.5 s
- Resistance - Initial (Ri) (Min)：1 Ohms
- Resistance - Post Trip (R1) (Max)：3 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)：0.500" (12.70mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX025/72-0-17 is a polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse series. It features a holding current of 250 mA and a trip current of 500 mA, rated for a maximum voltage of 72 VDC. The component has a typical resistance of 1.95 Ohms and operates within a temperature range of -40°C to +85°C. It utilizes a radial leaded package with a 5.1 mm lead spacing, measuring 7.4 mm in diameter and 12.7 mm in height.
Feature Summary
- Provides overcurrent protection through automatic resistance increase upon fault conditions
- Enables circuit restoration without manual replacement after cooling
- Designed for PCB mounting via radial leads
Applications
- Overcurrent protection for portable electronic devices
- Protection circuits for battery-powered equipment
- Signal line protection in communication interfaces
Procurement Notes
Verify the specific suffix '-0-17' against the manufacturer's official datasheet to confirm packaging details and compliance status. Ensure that the required holding and trip currents align with the system's operational parameters before procurement. Cross-reference the RoHS declaration directly with the supplier documentation to meet regulatory requirements.
Selection Notes
Select this component when a low-profile radial PTC fuse is required for 72V DC systems. The 250 mA holding current suits applications needing precise overcurrent thresholds. Consider the 1.95 Ohm resistance impact on signal integrity or power loss in sensitive circuits compared to lower-resistance alternatives.
Part Context
This part belongs to the Bourns MF-RX series of resettable fuses, designed for compact electronics. The 'MF-RX' designation indicates a specific family of polymeric PTC devices optimized for space-constrained PCB layouts. The series offers various current ratings while maintaining consistent voltage ratings and form factors.
Replacement Considerations
Direct substitutes include MF-RX025/72-AP and MF-RX025/72-2-17, which share identical electrical specifications. Verify that alternative suffixes match the required packaging type and lead configuration for the target application.
FAQ
What is the difference between the MF-RX025/72-0-17 and MF-RX025/72-AP?
Both parts share identical electrical characteristics, including 250 mA holding current and 72V rating. The primary difference lies in the packaging format; the '-AP' suffix typically denotes Ammo Pack packaging, whereas the '-0-17' suffix specifies Reel packaging.
Does the MF-RX025/72-0-17 require manual resetting?
No, it is a self-resetting device. Once the fault condition is removed and the component cools down, its resistance returns to normal, automatically restoring circuit continuity without manual intervention.
