FEMTOSMDC005F-2

Ptc Resettable Fuses Overview

The Littelfuse FEMTOSMDC005F-2 is a polymer PTC resettable fuse from the femtoSMD series, designed for surface mount applications in the 0603 (1608 metric) package. It features a maximum voltage rating of 15V and a hold current (Ih) of 50 mA. The trip current (It) is specified at 150 mA, with a maximum fault current capacity of 40 A. Initial resistance (Ri) is typically 3.8 Ohms minimum, rising to a maximum of 30 Ohms after tripping. The device operates within a temperature range of -40°C to 85°C and has a trip time of 100 ms.

Ptc Resettable Fuses Feature Summary

• Utilizes polymer technology for self-resetting circuit protection capabilities
• Engineered for compact surface mount integration in small form factor designs
• Provides reliable overcurrent protection with defined thermal response characteristics

Ptc Resettable Fuses Applications

• Building and home automation circuits
• IoT control unit power lines
• Portable electronic device protection

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified suppliers. Confirm that the received parts match the specific femtoSMD series designation and package type. Check for RoHS3 compliance markings as indicated in official documentation. Ensure storage conditions maintain moisture sensitivity level integrity prior to reflow soldering processes.

Ptc Resettable Fuses Selection Notes

Select this component when space constraints require a 0603 footprint for low-current protection. The 15V rating suits low-voltage digital logic and communication interfaces. Consider the 50 mA hold current against normal operating loads to prevent nuisance tripping. Evaluate the 30 Ohm maximum post-trip resistance impact on downstream circuit performance during fault conditions.

Ptc Resettable Fuses Part Context

This part belongs to the PolySwitch femtoSMD family, representing Littelfuse's miniaturized resettable fuse solutions. It complements larger series like ASMD and miniASMD by offering protection in ultra-compact packages suitable for dense PCB layouts. The series focuses on balancing size reduction with robust circuit protection performance for modern electronics.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include FEMTOASMDC005F-2 for automotive-grade requirements. Other femtoSMD variants with different current ratings may serve if electrical parameters align with design needs.