SG338

Inrush Current Limiters (ICL) Overview

The SG338 is a radial leaded Negative Temperature Coefficient (NTC) thermistor from the Vishay Ametherm SURGE-GARD series, designed for PCB mounting. It functions as an inrush current limiter with a nominal resistance of 10 Ohms and a tolerance of ±15%. The component supports a steady-state current rating of 5 A and operates at voltage ratings up to 265 VAC. Physical dimensions include a diameter of 0.450 inches (11.43 mm). It features outside kinked leads with a pitch of 0.35 inches.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes NTC thermistor technology to suppress high initial charging currents during power-up
• Features outside kinked radial leads for secure through-hole PCB integration
• Complies with UL safety standards for industrial applications

Inrush Current Limiters (ICL) Applications

• Switching power supply input stages
• Electronic ballast circuits
• Motor drive protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix against the official datasheet to confirm lead configuration and certification status. Ensure the selected variant matches the required thermal and electrical specifications for the target circuit environment. Cross-reference manufacturer part numbers with distributor catalogs to avoid ambiguity regarding package variations or regional compliance markings.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required cold resistance value and maximum allowable steady-state current for the application. Evaluate the physical footprint constraints to ensure compatibility with the PCB layout and hole spacing. Confirm that the operating temperature range aligns with the environmental conditions of the final assembly to maintain performance stability.

Inrush Current Limiters (ICL) Part Context

The SG338 belongs to the Vishay Ametherm SURGE-GARD family of inrush current limiters. This series provides reliable protection for sensitive electronic components against transient overcurrent events. The product line is engineered for robust performance in various consumer and industrial electronics requiring effective surge management.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes within the same series include models with matching resistance and current ratings. Verify lead type and dimensional tolerances before substitution. Consult the manufacturer's cross-reference guide for approved alternative part numbers that meet identical electrical and mechanical requirements.