SL1550003

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL1550003 is a radial leaded NTC thermistor designed for inrush current limiting applications. It features a nominal resistance of 5 ohms and a steady-state current rating of 3 amperes. The component has a cylindrical body diameter of 15 mm with a width of 4.5 mm. It utilizes radial leads with a diameter of 0.8 mm and a standard spacing of 7.8 mm. The device is rated for AC voltages of 115 VAC and 230 VAC, with a resistance tolerance of 20 percent.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient (NTC) ceramic composition to provide high initial resistance that decreases as temperature rises during operation.

Inrush Current Limiters (ICL) Applications

• Protection of power supplies against high inrush currents during startup
• Limiting surge currents in AC mains powered electronic equipment

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific part number suffix to confirm lead configuration and tolerance requirements. Ensure the thermal environment allows for adequate heat dissipation to maintain stable operating resistance. Confirm that the steady-state current rating exceeds the maximum continuous load current of the target circuit to prevent component failure.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required nominal resistance value and the maximum allowable inrush current limit. Verify that the physical dimensions fit within the available PCB footprint constraints. Ensure the voltage rating meets or exceeds the peak line voltage present in the application circuit.

Inrush Current Limiters (ICL) Part Context

This component belongs to the SL15 series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance values and current ratings tailored for different power levels. These devices are commonly used in consumer electronics and industrial power systems requiring reliable surge protection.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other Vishay SL15 variants sharing identical 5-ohm resistance and 3-ampere current ratings. Verify mechanical compatibility including lead spacing and body diameter before substitution.