SG302

Inrush Current Limiters (ICL) Overview

The SG302 is a radial leaded Negative Temperature Coefficient (NTC) thermistor from the Vishay Ametherm SURGE-GARD series, designed as an inrush current limiter for PCB mounting. It features a nominal resistance of 2 Ohms at +25°C with a tolerance of ±15%. The component has a continuous current rating of 18 A and a voltage rating of 265 VAC. Physical dimensions include a diameter of 0.900 inches (22.86 mm), a width of 0.3 inches, and a lead spacing of 0.35 inches. It operates within a temperature range of 0°C to +65°C.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes NTC thermistor technology to provide high initial resistance that decreases as temperature rises during operation.

Inrush Current Limiters (ICL) Applications

• Protection against inrush currents in electronic power supplies
• Surge protection in AC mains input circuits

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific datasheet version for the SG302 model to confirm detailed thermal characteristics and derating curves. Ensure the selected component matches the required PCB hole spacing and lead configuration for your assembly process. Cross-reference the manufacturer's official documentation for any updates on compliance standards or package variations.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required steady-state current handling and initial resistance value for the target circuit. Consider the physical size constraints regarding the 0.900-inch diameter and the available board space for radial leads. Evaluate the operating temperature environment to ensure it remains within the specified 0°C to +65°C range for reliable performance.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SURGE-GARD series of inrush current limiters manufactured by Vishay Ametherm. These components are specifically engineered to protect sensitive electronic components from damage caused by high surge currents during power-up. The SG302 variant offers a balance of moderate resistance and high current capacity suitable for various industrial and commercial applications.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes may include other Vishay Ametherm models within the SG series with similar electrical ratings. Verify compatibility with alternative manufacturers' NTC thermistors by matching resistance, current, and voltage specifications precisely.