SG240

Inrush Current Limiters (ICL) Overview

The SG240 is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm SURGE-GARD series. It features a nominal resistance of 40 Ohms with a tolerance of ±15% and a steady-state current rating of 2 A. The device is rated for 265 VAC and has a maximum operating temperature of +65°C. Physical dimensions include a diameter of 0.625 inches (15.88 mm). It utilizes radial leads with a spacing of 0.31 inches and is designed for PCB mount installation.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes specially formulated metal oxide ceramic materials for robust performance
• Certified to UL safety standards for industrial compliance
• Radial lead configuration facilitates standard printed circuit board mounting

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Electronic ballast circuits
• Motor drive protection

Inrush Current Limiters (ICL) Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the received part matches the specific SG240 designation, including resistance value and package style. Request relevant certification documents such as UL listings to ensure regulatory compliance for end-product integration. Inspect physical terminals for integrity prior to assembly.

Inrush Current Limiters (ICL) Selection Notes

Select the SG240 based on its 40 Ohm initial resistance and 2 A current handling capability. Ensure the application voltage does not exceed the 265 VAC rating. Consider the thermal environment, as the maximum operating temperature is limited to +65°C. Verify that the radial lead spacing aligns with the target PCB footprint design requirements.

Inrush Current Limiters (ICL) Part Context

The SG240 belongs to the SURGE-GARD product line, which specializes in NTC inrush current limiting devices. This series is engineered to protect sensitive electronic components from high startup currents common in power systems. The component represents a standard solution for managing transient energy during system initialization phases.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes within the same series require matching electrical parameters, specifically 40 Ohms resistance and 2 A current rating. Alternative parts must maintain compatible voltage ratings and physical mounting styles. Cross-reference datasheets to confirm thermal characteristics and certification status before implementation.