SL222R510B

Overview

The SL222R510B is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm SL22 series. It features a nominal resistance of 2.5 Ohms at 25°C with a tolerance of ±20%. The component has a maximum steady-state current rating of 10 A and a disc diameter of 22 mm. Designed for PCB mounting, it utilizes radial leads with a standard spacing of 7.8 mm. The device operates within a voltage range supporting 115 VAC and 230 VAC applications.

Feature Summary

• Provides effective suppression of high inrush currents during power-up cycles to protect downstream electronic components.
• Features self-resetting capability that allows automatic recovery to low resistance after thermal stabilization.
• Constructed with a robust ceramic body suitable for through-hole PCB integration.

Applications

• Power supply input stages
• Transformer primary circuits
• Capacitor charging protection

Procurement Notes

Verify the specific suffix 'B' against the manufacturer datasheet to confirm lead time and packaging details. Ensure the 10 A current rating aligns with the system's operational requirements. Cross-reference the 2.5 Ohm resistance value with circuit design specifications to guarantee proper inrush limiting performance.

Selection Notes

Select this component based on the required 2.5 Ohm initial resistance and 10 A continuous current capacity. Consider the 22 mm package size for adequate heat dissipation and mechanical clearance on the printed circuit board. Validate compatibility with the target operating voltage levels of 115 VAC or 230 VAC.

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 form factor. These components are widely utilized in consumer electronics and industrial equipment requiring reliable surge protection.

Replacement Considerations

Compatible substitutes include the SL222R020 and SL225R012 from the same manufacturer series. Verify that alternative parts match the 2.5 Ohm resistance requirement and 10 A current handling capability before implementation.