SG337

Inrush Current Limiters (ICL) Overview

The SG337 is a radial leaded NTC thermistor inrush current limiter from the Vishay Surge-Gard SG series. It features a nominal resistance of 10 Ohms at 25°C with a tolerance of ±15%. The component supports a steady-state current rating of 2 A and has a diameter of 12.7 mm (0.500 inches). Designed for PCB mounting, it operates within a temperature range of -40°C to +85°C.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient technology to provide high initial resistance that decreases as temperature rises during operation.
• Radial leaded construction facilitates through-hole PCB integration for compact circuit board layouts.
• Engineered to absorb transient energy and limit peak charging currents during power-up sequences.

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• AC/DC converter circuits
• Electronic ballast protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix codes against official Vishay documentation to confirm exact resistance tolerances and thermal characteristics. Ensure the selected variant matches the required steady-state current and voltage ratings for the target application environment.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required 10 Ohm nominal resistance and 2 A current handling capability. Confirm that the 12.7 mm diameter fits the available PCB spacing and that the operating temperature range aligns with the system's thermal profile.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm Surge-Gard SG series of inrush current limiters. These components are specifically designed to protect sensitive electronic equipment from damage caused by high surge currents during initial power application.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other SG series variants such as SG334 or SG365 if different resistance values or physical dimensions are required. Verify compatibility with equivalent products from other manufacturers before substitution.