SL2220007

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL2220007 is a bigAMP inrush current limiting NTC thermistor designed for PCB mounting. It features a nominal resistance of 20 Ohms with a tolerance of ±25% and a steady-state current rating of 7 A. The device has a diameter of 22 mm and supports voltage ratings of 115 VAC and 230 VAC. It offers an energy absorption capacity of 125 J and a maximum voltage handling capability of 265 VRMS. The component utilizes radial leads and is packaged in bulk quantities.

Inrush Current Limiters (ICL) Feature Summary

• Provides high initial resistance to absorb surge currents during equipment startup, protecting downstream circuitry from damage.
• Resistance drops rapidly to negligible levels during steady-state operation, minimizing power loss and heat generation.
• Certified by UL Solutions under File E209153, ensuring compliance with strict safety standards for quality and reliability.

Inrush Current Limiters (ICL) Applications

• Switching power supplies
• Uninterruptible power supplies (UPS)
• Industrial inverters
• Variable frequency drives

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific part number suffix against official Vishay documentation to ensure correct tolerance and lead configuration. Confirm that the required steady-state current does not exceed 7 A and that the peak inrush energy remains within the 125 J limit. Check for UL certification marks on the component body if regulatory compliance is mandatory for the end application.

Inrush Current Limiters (ICL) Selection Notes

Select this component when applications require robust protection against high inrush currents in AC-powered systems. Ensure the operating environment allows for adequate thermal dissipation as the device heats up during normal operation. Compare the 20 Ohm cold resistance against the system's leakage current requirements to prevent nuisance tripping or excessive voltage drop at startup.

Inrush Current Limiters (ICL) Part Context

This component belongs to the SL22 series of bigAMP inrush current limiters manufactured by Vishay Ametherm. The series is characterized by its 22 mm diameter form factor, which accommodates higher energy absorption capabilities compared to smaller packages. These NTC thermistors are engineered for durability and long-term performance in demanding industrial and commercial power electronics environments.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes must match the 20 Ohm resistance, 7 A current rating, and 22 mm diameter. Verify that alternative NTC thermistors offer comparable energy absorption (125 J) and UL certification status. Ensure the replacement maintains the same radial lead spacing and PCB mounting compatibility to avoid redesigning the footprint.