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MF-R400-AP
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 4A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Box (TB)
- 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 Bourns MF-R400-AP is a radial leaded PPTC resettable fuse from the Multifuse MF-R series. It features a hold current of 400 mA and a trip current of 800 mA, rated for a maximum voltage of 60 VDC. The device has a maximum fault current rating of 40 A and an initial resistance of 860 mOhms. Operating temperature range spans from -40°C to +85°C. Physical dimensions include a diameter of 7.4 mm, height of 13.7 mm, and length of 7.4 mm, with a lead spacing of 5.1 mm. Power dissipation is specified at 550 mW.
Feature Summary
- Provides automatic circuit protection through self-resetting polymer positive temperature coefficient technology.
Applications
- Overcurrent protection in consumer electronics circuits
- Protection for portable computing devices and peripherals
- Surge and overcurrent safeguarding in telecommunications equipment
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number MF-R400-AP with official Bourns documentation. Confirm RoHS compliance status via the specific datasheet. Ensure the selected supplier provides valid traceability records and original packaging specifications matching the Ammo Pack format.
Selection Notes
Select this component when designing circuits requiring a 400 mA hold current and 60 VDC maximum voltage rating. Consider the 860 mOhms resistance and 550 mW power dissipation limits during thermal analysis. Verify that the radial leaded package fits the PCB layout constraints and that the operating temperature range meets environmental requirements.
Part Context
This component belongs to the Bourns Multifuse MF-R series of resettable fuses. These devices utilize polymeric positive temperature coefficient materials to provide reusable overcurrent protection. The series offers various current ratings and package options for diverse electronic applications.
Replacement Considerations
Consult official Bourns substitution guides for verified alternatives. Cross-reference parameters such as hold current, trip current, voltage rating, and physical dimensions to ensure functional compatibility with existing designs.
