SG7

Inrush Current Limiters (ICL) Overview

The SG7 is a radial leaded NTC thermistor from the SURGE-GARD series, designed as an inrush current limiter for PCB mounting. It features a nominal resistance of 2.5 Ohms with a tolerance of ±15%. The component has a maximum voltage rating of 265 VAC and a continuous current rating of 10 A. Physical dimensions include a diameter of 0.900 inches (22.86 mm) and a width of 0.300 inches (7.62 mm). Lead specifications consist of a 0.04-inch diameter with a 0.35-inch spacing.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient technology to restrict high initial charging currents
• Features outside kinked leads for secure through-hole PCB installation
• Rated for operation within a standard ambient temperature range

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuits
• Motor drive protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific manufacturer designation, as SG7 may refer to different variants across distributors. Confirm that the 10 A rating aligns with your application requirements, as some sources cite 15 A. Ensure the 265 VAC rating meets your system's electrical standards before finalizing procurement.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a low-resistance NTC is required for moderate current applications. The 2.5 Ohm value provides effective limiting without excessive steady-state power dissipation. Verify that the physical footprint fits the target PCB layout and that the radial termination style matches the assembly process.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SURGE-GARD family of inrush current limiters. These components are engineered to protect sensitive electronic equipment from damage caused by high surge currents during power-up events. The series offers various resistance and current ratings to suit diverse industrial and commercial power systems.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with SG15 or SG307 if higher current capacity is needed. Verify that substitute parts maintain the same 2.5 Ohm nominal resistance and radial package dimensions to ensure mechanical compatibility.