SL18 2R508-B

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL182R508B is a radial lead inrush current limiter from the SL18 series. It features a nominal resistance of 2.5 Ohms with a tolerance of ±20%. The device supports a maximum steady-state current of 8 A at 25°C and operates within voltage ratings up to 120 VAC. Mechanical dimensions include a diameter of approximately 19 mm (0.748 inches) and a width of 6.25 mm. The component utilizes a bulk packaging format and is designed for PCB mounting applications requiring surge protection.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective limitation of high inrush currents during power-up phases
• Utilizes thermistor technology for automatic resistance adjustment based on temperature
• Supports steady-state operation after initial thermal stabilization

Inrush Current Limiters (ICL) Applications

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

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix B against the manufacturer's latest documentation to ensure correct mechanical and electrical specifications. Confirm that the 8 A current rating aligns with the system's continuous operating requirements. Check RoHS compliance status through official datasheets before finalizing procurement decisions.

Inrush Current Limiters (ICL) Selection Notes

Select this component when circuit design requires an 8 A steady-state current capacity with a 2.5 Ohm initial resistance. Ensure the physical footprint accommodates the 19 mm diameter and radial lead spacing. Evaluate thermal management needs as the device dissipates energy during the inrush event, potentially affecting nearby components.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SL18 series of inrush current limiters. These devices are engineered for general-purpose surge suppression in electronic equipment. The series offers various resistance and current combinations to suit different power levels and form factors.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference equivalent parts from other manufacturers offering similar 2.5 Ohm resistance and 8 A current ratings. Verify dimensional compatibility and lead configuration before substitution.