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MF-R400-2-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 4A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：4:00 AM
- Current - Trip (It)：8:00 AM
- Current - Max：40 A
- Time to Trip：12.7 s
- Resistance - Initial (Ri) (Min)：10 mOhms
- Resistance - Post Trip (R1) (Max)：50 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.567" L x 0.118" W (14.40mm x 3.00mm)
- Height - Seated (Max)：0.976" (24.80mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The MF-R400-2-99 is a radial polymeric resettable fuse from Bourns Inc., rated for 30V maximum voltage and 4A hold current. It features a 40A maximum interrupt current (Imax) and a low resistance of 0.01 Ohms. The device operates within a temperature range of -40°C to +85°C and has a power rating of 2.5W. The suffix '-2-99' indicates tape and reel packaging with a specific device pitch. Dimensions are approximately 14.4 x 3 x 24.8mm.
Feature Summary
- Polymeric PTC technology for automatic circuit protection
- Compact radial design suitable for precise control applications
- Low resistance characteristic for minimal voltage drop
- High temperature capability up to 85°C
Applications
- Automotive circuits requiring AEC-Q200 compliance
- Industrial power supply protection
- Consumer electronics overcurrent safeguarding
- Telecommunications equipment circuit defense
Procurement Notes
Verify component status as the MF-R400-2-99 is listed as obsolete and no longer manufactured by Bourns Inc. Confirm availability of approved substitutes or alternative package types through authorized distributors. Ensure replacement parts meet identical electrical specifications, including hold current, trip current, and voltage ratings. Check for RoHS compliance and packaging requirements matching original system constraints.
Selection Notes
Select this component for applications requiring radial leaded resettable fuses with 4A hold current and 30V rating. Consider the 0.01 Ohm resistance for low-loss designs. Evaluate thermal management needs given the 2.5W power rating and 85°C operating limit. Verify space constraints against the 14.4 x 3 x 24.8mm dimensions. Confirm compatibility with tape and reel assembly processes if indicated by the suffix.
Part Context
The MF-R400 series represents Bourns' line of compact radial PPTC resettable fuses designed for overcurrent protection. These devices utilize polymeric technology to provide automatic reset functionality after fault conditions clear. The series supports various current ratings and packaging options, catering to diverse electronic protection needs across automotive, industrial, and consumer sectors.
Replacement Considerations
Public confirmed substitute part numbers are not explicitly provided in the source data. Consult Bourns official documentation or authorized distributors for valid cross-reference alternatives that match the 4A hold current, 30V rating, and radial package form factor.
