SL12 40002-A

Inrush Current Limiters (ICL) Overview

The SL12 40002-A is a Negative Temperature Coefficient (NTC) thermistor from the Vishay Ametherm SL12 series, designed as an inrush current limiter. It features a radial leaded package with a diameter of 13.00 mm and a lead spacing of 7.80 mm. The component has a nominal resistance of 40 ohms with a tolerance of ±25%. It supports a maximum steady-state current of 2.0 A up to 65°C and exhibits a low hot resistance of 450 mOhms.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up cycles
• Features self-resetting capability for repeated protection applications
• Utilizes a robust radial leaded construction for through-hole mounting

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 'A' against the manufacturer datasheet to confirm mechanical or electrical variations. Ensure the required steady-state current does not exceed 2.0 A at operating temperatures up to 65°C. Confirm that the 40-ohm resistance aligns with the circuit design requirements for inrush limiting.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 13 mm diameter NTC thermistor is required for moderate current applications. The 40-ohm resistance value suits circuits needing specific impedance characteristics. Consider the 2.0 A steady-state limit and the ±25% tolerance when designing for thermal stability and performance consistency.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL12 series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance values and current ratings within a standardized 13 mm form factor. These components are widely used in electronic equipment to protect sensitive downstream components from initial surge currents.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other Vishay Ametherm SL12 variants such as SL12 40002 for potential compatibility. Verify that substitute parts match the 40-ohm resistance, 2.0 A current rating, and 13.00 mm diameter specifications.