SMD100F/33-2

Ptc Resettable Fuses Overview

The Littelfuse SMD100F/33-2 is a PolySwitch resettable PTC device designed for surface-mount circuit protection. It features a maximum voltage rating of 33 VDC and a hold current of 100 mA. The trip current is specified at 200 mA, with a maximum fault current rating of 40 A. The component exhibits a maximum resistance of 1.5 ohms in the tripped state and operates within a temperature range of -40°C to +85°C. Packaged in a compact 1206 (3216 metric) footprint, it provides reliable overcurrent protection for sensitive electronics.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection by increasing resistance upon heating during fault conditions
• Designed specifically for surface-mount assembly on printed circuit boards
• Offers UL recognized and TUV approved safety certifications for global compliance

Ptc Resettable Fuses Applications

• Protection of portable electronic devices and handheld equipment
• Overcurrent safeguarding for telecommunications and networking ports
• Circuit protection for battery-powered consumer appliances

Ptc Resettable Fuses Procurement Notes

Verify the specific package code suffix matches the required board layout dimensions. Confirm that the thermal environment supports the rated operating temperature range. Ensure the holding current meets the circuit's normal operational requirements without nuisance tripping. Check for RoHS compliance status if restricted substances are mandated.

Ptc Resettable Fuses Selection Notes

Select this component when a low-cost, resettable solution is preferred over one-time fuses. The 100 mA hold current suits low-power signal lines or standby circuits. The 33 VDC rating limits usage to low-voltage DC systems. Consider the higher impedance compared to standard fuses when evaluating voltage drop impacts.

Ptc Resettable Fuses Part Context

This part belongs to the PolySwitch SMD series of polymer positive temperature coefficient devices. These components serve as alternatives to traditional fusible links in space-constrained designs. The series is widely utilized in automotive, industrial, and consumer sectors for robust circuit safeguarding.

Ptc Resettable Fuses Replacement Considerations

Cross-reference with ASMDC100F/33-2 for similar specifications in alternative packaging formats. Verify compatibility with MINISMDC series variants if smaller footprints are required.