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FSMD300R is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists RFE/Fuzetec. Its product description is RESETTABLE FUSE - SMD, 1812 SIZE. Review the specifications below when checking this part for your BOM.
Ptc Resettable Fuses specifications for FSMD300R
- Description：RESETTABLE FUSE - SMD, 1812 SIZE
- Series：FSMD1812
- Mfr：RFE/Fuzetec
- Package：Tape & Reel (TR)
- Type：-
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：3:00 AM
- Current - Trip (It)：5:00 AM
- Current - Max：100 A
- Time to Trip：4 s
- Resistance - Initial (Ri) (Min)：12 mOhms
- Resistance - Post Trip (R1) (Max)：40 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1812 (4532 Metric), Concave
- Size / Dimension：0.179" L x 0.128" W (4.55mm x 3.24mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.061" (1.55mm)
- Lead Spacing：-
Ptc Resettable Fuses datasheet and documents for FSMD300R
Ptc Resettable Fuses Overview
The FSMD300R is a surface-mountable PTC resettable fuse from the FSMD1812 series, designed for high-density circuit protection. It features a 6V maximum voltage rating and operates with a 3A hold current and a 5A trip current. The component utilizes a concave package style in an 1812 (4532 Metric) footprint. It is RoHS compliant and halogen-free, suitable for protecting low-voltage digital signal switching applications.
Ptc Resettable Fuses Feature Summary
- Surface mountable construction for automated assembly
- Resettable overcurrent protection mechanism
- RoHS compliant and halogen-free composition
Ptc Resettable Fuses Applications
- Low-voltage USB port protection
- Digital signal switching circuits
- High-density board protection
Ptc Resettable Fuses Procurement Notes
Verify the specific datasheet version to confirm electrical tolerances and thermal characteristics. Ensure the procurement source provides official documentation from RFE/Fuzetec or authorized distributors. Confirm that the component meets the required safety standards for the target application environment before integration.
Ptc Resettable Fuses Selection Notes
Select this component for low-voltage applications requiring compact overcurrent protection. Consider the 6V rating and 3A hold current when designing circuits. Evaluate the physical dimensions against available PCB space constraints. Verify compatibility with reflow soldering profiles specified in the manufacturer's guidelines.
Ptc Resettable Fuses Part Context
This part belongs to the FSMD1812 series of surface mountable PTC resettable fuses. The series is engineered for modern electronic assemblies requiring reliable protection in minimal space. It serves as a protective element against overcurrent conditions in consumer electronics and industrial control boards.
Ptc Resettable Fuses Replacement Considerations
The FSMD300R may serve as a drop-in replacement for the Bourns MF-MSMF300/60 in specific low-voltage 5V USB applications, provided the voltage and current ratings align with the design requirements.
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