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MF-RM005/240-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 240V 50MA RADIAL
- Series：Multifuse®, MF-RM
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：240V (265V Int)
- Current - Hold (Ih) (Max)：50 mA
- Current - Trip (It)：120 mA
- Current - Max：1:00 AM
- Time to Trip：10 s
- Resistance - Initial (Ri) (Min)：18.5 Ohms
- Resistance - Post Trip (R1) (Max)：65 Ohms
- Operating Temperature：-20°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.327" Dia x 0.150" T (8.30mm x 3.80mm)
- Height - Seated (Max)：0.508" (12.90mm)
- Thickness (Max)：-
- Lead Spacing：0.114" (2.90mm)
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Overview
The Bourns MF-RM005/240-2 is a radial leaded PPTC resettable fuse from the MF-RM series. It features a hold current of 0.05 A and a trip current of 120 mA with a 10 s trip time. Rated for 240 VAC, it has a maximum resistance range of 18.5 Ω to 65 Ω and operates between -20°C and +85°C. The component measures 8.3 mm in length and 12.9 mm in height, with a 0.51 mm lead diameter. It dissipates up to 0.9 W and carries UL and RoHS certifications.
Feature Summary
- Provides automatic circuit protection through self-resetting polymer positive temperature coefficient technology
- Designed for radial PCB mounting with standard lead configuration
Applications
- Overcurrent protection in consumer electronics
- Industrial instrumentation circuit safeguarding
- Telecommunications equipment power lines
Procurement Notes
Verify that the specific part number matches the required electrical ratings before procurement. Confirm compliance with regional regulatory standards such as RoHS. Ensure the voltage rating aligns with the application's maximum operating conditions. Check datasheet revisions for any recent parameter updates or packaging changes prior to finalizing orders.
Selection Notes
Select this component when a low hold current of 0.05 A is required for sensitive circuits. The 240 VAC rating suits mains-connected applications. Verify that the physical dimensions fit the available PCB space. Consider the thermal environment to ensure operation within the specified -20°C to +85°C range without derating issues.
Part Context
This device belongs to the MF-RM series of resettable fuses by Bourns. These components utilize conductive polymer technology to offer reusable overcurrent protection. The series provides various hold current options for different circuit requirements while maintaining a compact radial package suitable for through-hole assembly.
Replacement Considerations
Consult official Bourns documentation for direct cross-reference substitutes. Verify that any alternative maintains identical hold and trip currents. Ensure voltage ratings and package dimensions are compatible. Do not assume interchangeability based on series alone without checking specific electrical parameters.
