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MF-RX014/250U-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 145MA RADIAL
- Series：Multifuse®, MF-RX/250
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- 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-2 is a polymeric PTC resettable fuse from the Multifuse MF-RX/250 series, designed for overcurrent protection in electronic circuits. It features a hold current of 145 mA and a trip current of 290 mA, operating at a maximum voltage of 60 VDC (with a 250V internal rating). The device has a maximum resistance of 3.5 ohms and can withstand a maximum fault current of 100 A. It operates within a temperature range of -40°C to +85°C and utilizes radial leads for PCB mounting.
Feature Summary
- Provides automatic circuit recovery after fault conditions clear
- Offers dual voltage ratings for versatile application integration
- Utilizes polymeric technology for compact form factor
Applications
- Telecommunications equipment protection
- Computer peripheral circuit safeguarding
- Portable electronic device power lines
Procurement Notes
Verify component authenticity through authorized Bourns distributors or certified partners. Confirm that the specific suffix 'U-2' matches the required lead configuration and packaging format for your assembly process. Ensure compliance with RoHS directives if environmental regulations apply to your manufacturing standards.
Selection Notes
Select this component when a low-profile radial PTC fuse is required for 60V DC circuits. The 145 mA hold current suits sensitive signal lines or low-power data interfaces. Consider the 3.5 ohm initial resistance impact on voltage drop during normal operation before finalizing the design.
Part Context
This part belongs to the Multifuse MF-RX/250 series, which focuses on high-reliability protection for telecom and computer applications. The series is characterized by its small disc shape and radial lead style, allowing for efficient space utilization on printed circuit boards compared to larger industrial-grade fuses.
Replacement Considerations
Direct substitutes include the MF-RX014/250-B and MF-RX014/250-2. Verify that alternative variants maintain identical electrical parameters and physical dimensions to ensure mechanical compatibility without redesigning the PCB footprint.
FAQ
What is the difference between the 60V and 250V ratings?
The device is rated for 60VDC continuous operation, while the 250V value represents the internal material capability or maximum transient rating, allowing it to handle higher voltage spikes safely.
How does the trip current relate to the hold current?
The trip current is typically double the hold current; for this model, a 145 mA hold current corresponds to a 290 mA trip current, indicating the threshold where resistance increases significantly.
