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MF-RX012/250-T-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 120MA RADIAL
- Series：Multifuse®, MF-RX/250
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：60V (250V Int)
- Current - Hold (Ih) (Max)：120 mA
- Current - Trip (It)：-
- Current - Max：3:00 AM
- Time to Trip：-
- Resistance - Initial (Ri) (Min)：7 Ohms
- Resistance - Post Trip (R1) (Max)：16 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.256" L x 0.181" W (6.50mm x 4.60mm)
- Height - Seated (Max)：0.433" (11.00mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RX012/250-T-2 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the Multifuse RX series. It features a hold current of 120 mA and a trip current of 240 mA, with a maximum voltage rating of 60 VDC. The device exhibits an initial resistance of 7 Ohms minimum and a maximum current rating of 3 A. Designed for through-hole mounting, it operates within a temperature range of -40°C to +85°C and has a lead spacing of 5.1 mm.
Feature Summary
- Polymeric construction provides automatic circuit protection that resets after fault clearance
- Radial leaded configuration facilitates standard through-hole PCB mounting
- High reliability design ensures stable performance across specified industrial temperature ranges
Applications
- Telecommunications equipment circuit protection
- Portable electronic device power lines
- Battery pack overcurrent protection
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number MF-RX012/250-T-2 with official Bourns documentation. Confirm that the suffix T-2 corresponds to the specific tape-and-reel packaging format required for automated assembly processes. Ensure compliance with RoHS directives as indicated in the product specifications before final procurement authorization.
Selection Notes
Select this component when designing circuits requiring a 120 mA hold current and 60 VDC maximum voltage rating. The radial leaded package is suitable for applications where space constraints allow for through-hole technology. Engineers should account for the 7 Ohm initial resistance in low-voltage drop calculations and ensure the operating environment remains within the -40°C to +85°C thermal limits for optimal device longevity.
Part Context
This component belongs to the Bourns Multifuse RX series, which specializes in radial leaded PPTC resettable fuses. The series offers various current ratings tailored for diverse circuit protection needs. The MF-RX012/250-T-2 specifically addresses requirements for moderate current protection in compact electronic assemblies, providing a reliable alternative to traditional one-time fuses in consumer and industrial electronics.
Replacement Considerations
Direct substitutes include other MF-RX series variants with matching electrical characteristics, such as MF-RX012/250-2 or MF-RX012/250-U-A5-0, provided the packaging format aligns with manufacturing requirements. Verify that any replacement maintains the same 120 mA hold current and 60 VDC rating to ensure circuit compatibility.
