SL222R508

Overview

The SL222R508 is a radial leaded inrush current limiter from the Vishay Ametherm SL22 series. It features a nominal resistance of 2.5 Ohms with a tolerance of ±20%. The component has a maximum steady-state current rating of 8 A and is designed for PCB mounting. Physical dimensions include a diameter of 22 mm, a width of 6 mm, and a lead spacing of 7.8 mm. It operates at voltage ratings of 115 VAC and 230 VAC.

Feature Summary

• Utilizes NTC thermistor technology to limit high initial charging currents during power-up.
• Provides automatic reset functionality after thermal stabilization without requiring replacement.

Applications

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

Procurement Notes

Verify that the specific part number matches the required electrical parameters before ordering. Confirm package type and lead configuration align with the target PCB footprint. Ensure compliance with relevant safety standards such as UL approval for the intended application environment.

Selection Notes

Select this component based on the 2.5 Ohm resistance value and 8 A current capacity requirements. Consider the 22 mm diameter for adequate heat dissipation and physical clearance within the assembly. Validate compatibility with standard 115 VAC or 230 VAC operating voltages.

Part Context

This device belongs to the SL22 series of inrush current limiters manufactured by Vishay / Ametherm. These components are specifically engineered for applications requiring robust surge suppression in AC power systems. The series offers various resistance and current combinations to suit different circuit demands.

Replacement Considerations

Consult official Vishay documentation for direct cross-reference substitutes. Verify equivalent resistance, current rating, and physical dimensions when sourcing alternatives.