SG415

Inrush Current Limiters (ICL) Overview

The SG415 is a radial leaded NTC thermistor from the Vishay Ametherm SURGE-GARD series, designed as an inrush current limiter for PCB mounting. It features a nominal resistance of 0.7 Ohms with a tolerance of ±25%. The component supports a continuous current rating of 12 A and operates at voltage ratings up to 265 VAC. Physical dimensions include a diameter of 19.56 mm (0.770 inches) and a width of approximately 6.35 mm. The unit weighs 9.42 g and functions within a temperature range of 0°C to +65°C.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient (NTC) technology to provide high initial resistance that decreases as temperature rises during operation.
• Engineered specifically to suppress high inrush currents in power supply circuits upon energization.
• Features straight radial leads suitable for standard printed circuit board assembly processes.

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer protection circuits
• General electronic equipment requiring surge suppression

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific electrical parameters against the official datasheet before integration, focusing on the 0.7 Ohm resistance and 12 A current rating. Confirm that the physical footprint matches the PCB layout requirements. Ensure the operating environment stays within the specified thermal limits to maintain performance integrity.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a low-resistance inrush limiter is required for moderate current applications around 12 A. The 0.7 Ohm value suits circuits where minimal steady-state voltage drop is necessary. Consider the radial package style for through-hole mounting constraints and verify compatibility with the system's maximum AC voltage rating.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SURGE-GARD family of inrush current limiters manufactured by Vishay / Ametherm. These components are specialized NTC thermistors intended for protecting sensitive electronics from transient currents. The SG series represents a standard line of axial or radial devices used widely in industrial and consumer power applications.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other Vishay SG series parts like SG410 or SG420 if different resistance values are needed. Verify that substitute components match the 12 A current rating and 19.56 mm diameter to ensure mechanical fit and thermal performance equivalence.

Inrush Current Limiters (ICL) FAQ

What is the steady-state resistance of the SG415?

The nominal steady-state resistance is 0.7 Ohms with a tolerance of ±25%.

Can the SG415 be used in 265 VAC systems?

Yes, the component is rated for operation at voltages up to 265 VAC.