SG306

Inrush Current Limiters (ICL) Overview

The SG306 is a radial lead NTC thermistor inrush current limiter from the Vishay Ametherm SURGE-GARD series. It features a nominal resistance of 2.5 Ohms with a tolerance of ±15% and a continuous current rating of 10 A. The component is rated for 120 VAC and utilizes outside kinked leads for PCB mounting. Physical dimensions include a diameter of 0.6 inches (15.24 mm) and a width of 0.3 inches.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient thermistor technology to limit initial surge currents during power-up
• Designed for through-hole PCB mounting with outside kinked radial leads for secure mechanical retention
• Complies with UL safety standards for industrial and commercial electronic equipment applications

Inrush Current Limiters (ICL) Applications

• Power supply input stages for consumer electronics
• Industrial control circuit protection
• General purpose AC/DC adapter surge suppression

Inrush Current Limiters (ICL) Procurement Notes

Verify that the specific order suffix matches the required lead configuration, as standard variants may differ from the kinked lead version documented here. Confirm voltage ratings align with the target system's maximum operating conditions. Ensure thermal management considerations account for the self-heating characteristics inherent to NTC devices during steady-state operation.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 2.5 Ohm cold resistance is appropriate for the specific load requirements. The 10 A current rating suits moderate power applications. Consider the physical size constraints relative to the PCB layout. Verify compatibility with the intended operating temperature range of zero to sixty-five degrees Celsius for reliable performance.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SURGE-GARD family of inrush current limiters manufactured by Vishay Ametherm. These components are specifically engineered to protect sensitive electronic circuits from high initial charging currents. The SG series represents a standard line of robust NTC thermistors designed for widespread industrial adoption.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes within the same series include parts with matching electrical parameters such as the SG301 or SG339, provided the resistance and current ratings align with the design requirements. Always verify pinout compatibility and physical footprint before substitution.