SL1540004A

Inrush Current Limiters (ICL) Overview

The SL1540004A is a radial lead inrush current limiter from the Vishay Ametherm SL15 series, designed for PCB mounting. It features a nominal resistance of 40 ohms and a continuous current rating of 4 A. The component is rated for 115 VAC and 230 VAC operating voltages. It has a cylindrical body with a diameter of 15 mm and a width of 6 mm. Lead specifications include a diameter of 1 mm and a spacing of 7.8 mm. The device is RoHS compliant and UL approved.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes NTC thermistor technology to limit high inrush currents during power-up
• Provides robust energy absorption capability for switch mode power supply protection
• Features radial leads suitable for through-hole PCB mounting applications

Inrush Current Limiters (ICL) Applications

• Switch mode power supplies (SMPS)
• Power input stages requiring inrush current limiting
• Electronic equipment protecting against surge currents

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'A' against official Vishay documentation to confirm if it denotes a distinct variant or packaging format compared to the standard SL1540004. Ensure the selected component meets all required voltage and current ratings for the target application circuit. Confirm compliance with regional regulatory standards such as RoHS and UL approval status before integration.

Inrush Current Limiters (ICL) Selection Notes

Select this component when designing circuits that require effective suppression of initial charging currents. The 40-ohm resistance value must be appropriate for the specific capacitance load to ensure adequate limiting without excessive steady-state power dissipation. Verify that the 4 A continuous current rating exceeds the maximum operational current of the downstream circuitry to prevent thermal failure.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL15 series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance and current combinations to suit different power levels. These components are widely adopted in industrial and consumer electronics to protect sensitive semiconductor devices from damage caused by high initial surge currents.

Inrush Current Limiters (ICL) Replacement Considerations

The SL1540004 is a closely related part number within the same series. Substitution requires verifying that the alternative component matches the 40-ohm resistance, 4 A current rating, and physical dimensions. Ensure any substitute maintains equivalent thermal characteristics and voltage ratings for safe operation.