SG405

Inrush Current Limiters (ICL) Overview

The SG405 is a radial leaded NTC thermistor inrush current limiter from the SURGE-GARD series. It features a nominal resistance of 1 Ohm with a tolerance of ±25% and a steady-state current rating of 30 A. The component supports voltage ratings of 120 VAC, 240 VAC, and 680 VAC. It has a cylindrical body diameter of 31.75 mm (1.250 inches) and a maximum operating temperature of +65°C. The unit weighs approximately 19.0 grams and utilizes straight leads for PCB mounting.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient technology to provide high initial resistance that decreases as temperature rises during operation.
• Designed to suppress inrush currents in power supply circuits, protecting downstream components from thermal stress.
• Features UL approval for safety compliance in electronic equipment applications.

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Switching mode power supplies
• Electronic ballasts

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific datasheet version to confirm detailed electrical characteristics and mechanical dimensions. Ensure the selected component meets the required voltage and current specifications for the target application. Check for RoHS compliance status if environmental regulations apply. Confirm package type and lead configuration match the PCB layout requirements before finalizing procurement.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required nominal resistance and maximum steady-state current capacity. Consider the physical size constraints due to the 31.75 mm diameter. Evaluate the thermal environment to ensure the operating temperature range remains within limits. Compare against other series members if different form factors or resistance values are needed.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SURGE-GARD series of inrush current limiters. These devices are specifically engineered for protecting sensitive electronics against high startup currents. The SG405 variant offers a balance of moderate resistance and high current handling capability suitable for medium-power applications.

Inrush Current Limiters (ICL) Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.