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MF-R300-AP-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 3A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Box (TB)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：3:00 AM
- Current - Trip (It)：6:00 AM
- Current - Max：40 A
- Time to Trip：10.8 s
- Resistance - Initial (Ri) (Min)：20 mOhms
- Resistance - Post Trip (R1) (Max)：80 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.472" L x 0.118" W (12.00mm x 3.00mm)
- Height - Seated (Max)：0.720" (18.30mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The Bourns MF-R300-AP-99 is a polymeric positive temperature coefficient (PPTC) resettable fuse designed for circuit protection. It features a maximum voltage rating of 30 VDC and a hold current of 3 A. The device trips at 6 A and withstands a maximum trip current of 40 A. Initial resistance is typically 50 mOhms, with a post-trip resistance up to 80 mOhms. Operating temperature ranges from -40°C to +85°C. It utilizes radial leads with a 5.1 mm spacing and measures 3 mm in height.
Feature Summary
- Provides automatic circuit protection against overcurrent conditions through self-resetting functionality.
- Utilizes polymeric technology for reliable performance within specified thermal limits.
- Designed for PCB mounting via radial lead configuration.
Applications
- Industrial automation systems
- Process automation equipment
- High-power modules
Procurement Notes
Verify the specific suffix AP-99 matches your assembly requirements, as it denotes tape-and-reel packaging. Confirm that the 30V DC rating and 3A hold current align with your circuit design parameters. Ensure compatibility with the 5.1 mm lead spacing for your PCB footprint. Check datasheet specifications for trip time characteristics under expected fault currents.
Selection Notes
Select this component when a 30V DC rated PTC fuse is required for circuits drawing up to 3A continuously. Consider the 6A trip threshold and 40A maximum interrupting capacity for fault scenarios. Evaluate the -40°C to +85°C operating range against environmental conditions. Compare initial resistance values if signal integrity or power loss is critical.
Part Context
This part belongs to the MF-R series of PPTC resettable fuses manufactured by Bourns Inc. The series offers various current ratings and voltage options for general circuit protection. The MF-R300 variant specifically targets applications requiring 3A hold current capability. The AP-99 suffix indicates specific packaging and reel configuration for automated assembly processes.
Replacement Considerations
Cross-reference with other MF-R series parts for different current ratings. Verify equivalent PTC fuses from other manufacturers match the 30V DC, 3A hold, and 6A trip specifications. Ensure physical dimensions and lead spacing are compatible with existing PCB layouts.
