SL222R515

Overview

The SL222R515 is a negative temperature coefficient (NTC) inrush current limiter from the Vishay Ametherm SL22 series. It features a nominal resistance of 2.5 Ohms with a tolerance of ±20% and a steady-state current rating of 15 A. The component has a cylindrical body diameter of 22 mm and utilizes radial leads for PCB mounting. It is designed to limit initial surge currents during power-up cycles.

Feature Summary

• Provides effective limitation of high inrush currents during circuit energization
• Utilizes NTC thermistor technology for automatic resistance reduction after startup
• Features robust radial leaded construction suitable for through-hole PCB assembly

Applications

• Power supply input stages
• Transformer primary circuits
• Capacitive load protection

Procurement Notes

Verify the specific suffix requirements against the official datasheet, as variations may exist. Confirm that the 15 A current rating and 2.5 Ohm resistance align with the target application's thermal and electrical constraints. Ensure the 22 mm form factor fits the designated PCB footprint and clearance requirements.

Selection Notes

Select this component when a 2.5 Ohm initial resistance and 15 A holding current are required for inrush suppression. The 22 mm diameter indicates a higher energy absorption capacity compared to smaller packages. Consider the thermal dissipation characteristics and ambient operating temperatures to ensure reliable long-term performance in the intended circuit environment.

Part Context

This part belongs to the SL22 series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance and current ratings within a standardized 22 mm package size. These components are engineered for general-purpose circuit protection against transient surge currents in electronic equipment.

Replacement Considerations

The SL222R515B is listed as a related variant within the same product family. Verify if the 'B' suffix denotes any specific packaging or testing differences before substitution. Cross-reference electrical parameters strictly to ensure compatibility.