SL12 40002-B

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL12 40002-B is an NTC inrush current limiter (ICL) thermistor from the SL12 series. It features a nominal resistance of 40 Ohms with a tolerance of ±25%. The component has a body diameter of 13 mm and utilizes radial leads for through-hole mounting. It is rated for a maximum steady-state current of 2 Amps and supports a maximum recommended energy input of 20 Joules.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up phases
• Utilizes negative temperature coefficient characteristics to reduce resistance after initial surge
• Designed for robust thermal performance under repeated switching cycles

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuits
• Capacitive load protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix designation against official documentation, as variations may exist within the SL12 family. Confirm that the 13 mm body size and 2 Amp rating align with the target circuit requirements. Ensure compliance with RoHS standards if required by the end application specifications.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 40 Ohm cold resistance is appropriate for limiting initial surge current. The 2 Amp steady-state rating must exceed the normal operating current of the load. Consider the 20 Joule energy limit to ensure the device can handle the available fault or charging energy without damage.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL12 series of inrush current limiters manufactured by Vishay Ametherm. These components are specialized NTC thermistors designed specifically for protecting electronic equipment from damaging current spikes during startup.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include other 40 Ohm, 2 Amp ICL thermistors with similar 13 mm dimensions. Verify that alternative parts meet the same 20 Joule energy rating and have compatible lead spacing for existing PCB layouts.