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MF-RG400-AP
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Product Detailed Parameters
- Description：PTC RESET FUSE 16V 4A RADIAL
- Series：Multifuse®, MF-RG
- Mfr：Bourns Inc.
- Package：Tape & Box (TB)
- Type：Polymeric
- Voltage - Max：16V
- Current - Hold (Ih) (Max)：4:00 AM
- Current - Trip (It)：6.8 A
- Current - Max：100 A
- Time to Trip：1.7 s
- Resistance - Initial (Ri) (Min)：21 mOhms
- Resistance - Post Trip (R1) (Max)：60 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.390" L x 0.118" W (9.90mm x 3.00mm)
- Height - Seated (Max)：0.504" (12.80mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-RG400-AP is a radial leaded PolySwitch resettable fuse from the MF-RG series, designed for overcurrent protection in electronic circuits. It features a hold current of 4.0 A and a trip current of 8.0 A, operating at a maximum voltage of 60 VDC. The device exhibits a typical resistance of 15 mOhms and can withstand a maximum fault current of 100 A. It functions within a temperature range of -40°C to +85°C, with a power dissipation rating of 2.0 W. The component measures 7.4 mm in diameter and 13.7 mm in height, utilizing a radial package style for PCB mounting.
Feature Summary
- Provides automatic circuit interruption and recovery upon cooling after an overcurrent event
- Offers robust protection against excessive current conditions without requiring manual replacement
- Designed for reliable performance in space-constrained printed circuit board assemblies
Applications
- Overcurrent protection for portable computing devices
- Surge protection in telecommunications equipment
- Circuit safeguarding in consumer electronics
- Protection for battery packs and power supplies
Procurement Notes
Verify that the specific suffix AP corresponds to the required Ammo Pack packaging configuration as defined by the manufacturer's official documentation. Confirm that the radial lead spacing and physical dimensions align with the target PCB footprint requirements before finalizing procurement decisions.
Selection Notes
Select this component when a high-current resettable fuse is required for 60 VDC systems. Ensure the application's steady-state current remains below the 4.0 A hold current threshold while accounting for ambient temperature derating curves provided in the datasheet to guarantee proper tripping behavior during fault conditions.
Part Context
This part belongs to the MF-RG series of PPTC resettable fuses manufactured by Bourns. The series is characterized by its ability to handle higher currents compared to standard PolySwitch devices, making it suitable for applications requiring significant surge tolerance. The product line supports various packaging options to facilitate automated assembly processes.
Replacement Considerations
Consult official Bourns substitution guides for direct equivalents. Verify that any alternative component matches the 4.0 A hold current, 60 VDC voltage rating, and radial package dimensions to ensure mechanical and electrical compatibility.
