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MF-RX014/250U-0
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 145MA RADIAL
- Series：Multifuse®, MF-RX/250
- Mfr：Bourns Inc.
- Package：Bulk
- Type：Polymeric
- Voltage - Max：60V (250V Int)
- Current - Hold (Ih) (Max)：145 mA
- Current - Trip (It)：-
- Current - Max：3:00 AM
- Time to Trip：-
- Resistance - Initial (Ri) (Min)：3.5 Ohms
- Resistance - Post Trip (R1) (Max)：12 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.236" L x 0.150" W (6.00mm x 3.80mm)
- Height - Seated (Max)：0.394" (10.00mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX014/250U-0 is a resettable fuse (PPTC) from the RX family, designed for overcurrent protection in electronic circuits. It features a hold current of 1.4A and a trip current of 2.5A at 25°C. The device operates with a maximum voltage rating of 60V DC and can interrupt fault currents up to 100A. Typical resistance is 0.14 ohms max initially, rising significantly upon tripping. It is housed in a compact radial leaded package suitable for surface mount or through-hole applications.
Feature Summary
- Self-resetting polymeric positive temperature coefficient device that automatically restores conductivity after cooling following an overcurrent event.
Applications
- Overcurrent protection for portable electronics
- Protection of USB ports and data lines
- Battery pack safeguarding in consumer devices
Procurement Notes
Verify the specific suffix 'U' indicates the unmarked or specific marking variant if required by your assembly process. Confirm the lead form matches your PCB footprint requirements. Ensure the operating ambient temperature range aligns with your system's thermal profile, as PPTC performance is temperature-dependent. Request the latest datasheet revision to confirm compliance with RoHS and REACH directives.
Selection Notes
Select this component based on the circuit's normal operating current being below the 1.4A hold current and potential fault currents exceeding the 2.5A trip threshold. Consider the maximum system voltage does not exceed 60V. Evaluate the time-to-trip characteristics against the protected device's tolerance to transient surges. Ensure the physical size fits within the available board space constraints.
Part Context
This part belongs to Bourns' RX series of resettable fuses, which are widely used for secondary protection in low-voltage digital circuits. The series offers various current ratings and package options to suit different power levels and spatial requirements. The MF prefix typically denotes a specific manufacturing line or material composition within the broader product portfolio.
Replacement Considerations
Direct replacements must match the 1.4A hold current, 2.5A trip current, and 60V rating. Verify that alternative manufacturers offer equivalent I²t values and maximum trip times. Check for identical package dimensions and lead spacing to ensure mechanical compatibility without PCB redesign.
