SL221R020A

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL221R020A is a radial lead inrush current limiter (ICL) from the SL22 series, designed for PCB mounting. It features a nominal resistance of 1 Ohm with a tolerance of ±20% and a steady-state current rating of 20 A. The component has a cylindrical body diameter of 22 mm and operates at voltage ratings of 115 VAC or 230 VAC. It utilizes radial termination with a lead spacing of 7.8 mm and is supplied in bulk packaging.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective protection against high inrush currents during power-up to safeguard downstream electronic components.
• Utilizes negative temperature coefficient (NTC) thermistor technology to reduce resistance as temperature increases.
• Features UL approval for compliance with safety standards in electrical equipment applications.

Inrush Current Limiters (ICL) Applications

• Protection of power supplies and transformers from initial surge currents
• Safeguarding electronic circuits in consumer appliances
• Current limiting in industrial control systems

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official datasheet to confirm exact parameter alignment, as suffixes may indicate variations in tolerance, voltage rating, or package style. Ensure compatibility with the target circuit's steady-state current requirements and thermal management needs before finalizing procurement orders.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required 1 Ohm resistance value and 20 A current handling capability. Consider the 22 mm diameter for physical space constraints on the PCB layout. Verify that the operating environment supports the thermal characteristics of NTC thermistors and that the radial lead spacing matches the board design.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SL22 series of inrush current limiters. These devices are widely used in power electronics to mitigate stress on rectifiers and capacitors during startup. The SL22 series offers various resistance and current ratings to suit different power levels, providing a standardized solution for surge protection across multiple industries.

Inrush Current Limiters (ICL) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult the manufacturer's cross-reference guide or contact technical support directly for verified alternatives that match the specific electrical and mechanical parameters of the SL221R020A.