SG310

Inrush Current Limiters (ICL) Overview

The SG310 is a radial lead Negative Temperature Coefficient (NTC) thermistor from the Vishay Ametherm SURGE-GARD series, designed for PCB mount applications. It functions as an inrush current limiter with a nominal resistance of 5 Ohms and a tolerance of ±15%. The component supports a maximum steady-state current of 4 A and operates at voltage ratings up to 265 VAC. Physical dimensions include a diameter of 0.600 inches (15.24 mm). It features kinked leads for secure mounting and maintains a stable operating temperature range between 0°C and +65°C.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes NTC thermistor technology to limit high initial surge currents during power-up
• Features kinked radial leads for reliable through-hole PCB mounting
• Provides thermal stability within a defined operating temperature range

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Electronic ballast circuits
• Transformer protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix against the official datasheet to confirm lead configuration and tolerance requirements. Ensure that the selected variant matches the required electrical parameters for the target circuit design. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity. Check for any recent product change notifications that may affect specifications or packaging.

Inrush Current Limiters (ICL) Selection Notes

Select the SG310 based on the required steady-state current handling capability of 4 A and the specific resistance value of 5 Ohms. Consider the physical size constraints regarding the 0.600-inch diameter when designing the PCB layout. Evaluate the thermal environment to ensure operation remains within the specified 0°C to +65°C range. Confirm compatibility with the system voltage rating of 265 VAC.

Inrush Current Limiters (ICL) Part Context

The SG310 belongs to the SURGE-GARD family of inrush current limiters manufactured by Vishay Ametherm. This series utilizes NTC thermistors to protect sensitive electronic components from damage caused by high initial charging currents. These components are widely used in various power conversion and control applications where surge suppression is critical for system reliability and longevity.

Inrush Current Limiters (ICL) Replacement Considerations

Consult the official Vishay Ametherm cross-reference documentation for verified substitute part numbers. Do not assume functional equivalence with other brands without verifying electrical and mechanical specifications.