SG379

Inrush Current Limiters (ICL) Overview

The SG379 is a SURGE-GARD series NTC thermistor inrush current limiter manufactured by Vishay / Ametherm. Designed for PCB mount applications with radial termination, this component features an outside kink lead style and a bulk package configuration. It operates within a temperature range of 0°C to +65°C. Key electrical specifications include a nominal resistance of 1 Ohm with a ±25% tolerance, a continuous current rating of 30 A, and a voltage rating of 265 VAC. The physical dimensions are characterized by a diameter of 1.25 inches (31.75 mm), a width of 0.25 inches, a lead diameter of 0.04 inches, and a pitch spacing of 0.35 inches.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient (NTC) thermistor technology to limit inrush currents during power-up phases.
• Features an outside kink lead design optimized for secure PCB mounting and mechanical stability.
• Rated for high continuous current handling up to 30 A with a standard 1 Ohm initial resistance.

Inrush Current Limiters (ICL) Applications

• Power supply input stages requiring surge protection
• Electronic equipment mains input circuits
• Industrial control systems with high inrush demands

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific manufacturing date code and RoHS compliance status directly with the manufacturer or authorized distributors before finalizing procurement orders. Ensure that the thermal environment of the application remains within the specified 0°C to +65°C operating range to maintain component reliability and performance characteristics over its intended service life.

Inrush Current Limiters (ICL) Selection Notes

Select the SG379 when circuit requirements demand a 1 Ohm resistance value combined with a 30 A current capacity. Confirm that the 265 VAC voltage rating aligns with the system's maximum line voltage. Consider the 1.25-inch diameter and radial pin spacing for adequate PCB footprint clearance and thermal dissipation requirements relative to adjacent components.

Inrush Current Limiters (ICL) Part Context

This component belongs to the SURGE-GARD product line from Vishay / Ametherm, specializing in inrush current limiting solutions. The SG series represents a family of NTC thermistors designed for robust protection against transient currents. This specific model provides a standardized solution for protecting sensitive downstream electronics from high initial charging currents common in capacitive loads.

Inrush Current Limiters (ICL) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative models based on matching electrical parameters including resistance, current rating, and voltage specifications.