SL12 20003-B

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL12 20003-B is a Negative Temperature Coefficient (NTC) thermistor designed as an inrush current limiter (ICL). It belongs to the SL12 series and features a disc size of 13 mm. The component has a nominal resistance of 20 ohms at 25°C with a tolerance of ±20%. It is rated for a steady-state current of 3 A. The device utilizes radial leads for through-hole PCB mounting.

Inrush Current Limiters (ICL) Feature Summary

• Functions as an NTC thermistor to limit initial surge currents during power-up
• Features a 13 mm disc form factor suitable for standard PCB layouts
• Provides stable resistance characteristics within specified tolerance bands

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuits
• Capacitor charging protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'B' against the manufacturer datasheet to confirm lead configuration or marking variations. Ensure the 20-ohm resistance and 3-ampere current ratings align with the target circuit requirements. Confirm package type compatibility with automated assembly processes if applicable.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 20-ohm cold resistance is required for moderate inrush suppression. The 3 A rating suits applications with lower peak loads compared to higher-current SL12 variants. Consider thermal dissipation capabilities and ambient operating temperature ranges during design integration.

Inrush Current Limiters (ICL) Part Context

This part is part of the Vishay Ametherm SL12 series, which offers various resistance values and current ratings. The SL12 series is widely used for protecting sensitive electronic components from high initial charging currents. The 20003-B designation specifies the unique electrical and physical parameters of this particular unit.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other SL12 series parts such as SL12 10003 or SL12 47003 for different resistance needs. Verify that substitute components match the 13 mm diameter and 3 A current handling capacity to ensure equivalent performance.