SL1222101

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL1222101 is a Negative Temperature Coefficient (NTC) thermistor designed as an inrush current limiter. It features a nominal resistance of 220 Ohms with a tolerance of ±20% at 25°C. The component supports a maximum steady-state current of 1 A and operates within a voltage rating of up to 230 VAC. It utilizes a radial leaded package with a diameter of 13.00 mm (0.512 inches) and a lead spacing of 7.80 mm (0.307 inches). The device is certified by UL and complies with RoHS3 standards.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective protection against transformer inrush currents using NTC thermistor technology.
• Features a robust radial leaded construction suitable for PCB mounting applications.
• Includes UL certification for safety compliance in electrical circuits.

Inrush Current Limiters (ICL) Applications

• Transformer inrush current limiting
• Power supply input protection
• Electronic equipment circuit protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix, such as 'B', if required by your design, as it may indicate variations in packaging or lead configuration compared to the base part number. Confirm that the 220 Ohm resistance value aligns with your thermal management requirements. Ensure the 1 A steady-state current rating exceeds your circuit's operational load to prevent component failure during normal operation.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a higher initial resistance is needed to limit surge currents in smaller transformers or low-power supplies. The 220 Ohm value distinguishes it from lower-resistance variants like the SL121R010. Consider the 13 mm diameter and 7.8 mm lead pitch to ensure adequate board space and mechanical clearance for installation.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SL12 series of inrush current limiters. The series offers various resistance values and current ratings to suit different power levels. The SL1222101 specifically targets applications requiring moderate inrush limitation with a 220 Ohm baseline resistance.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include other Vishay Ametherm parts within the SL12 series with matching electrical characteristics. Verify lead spacing and diameter compatibility before replacing components in existing PCB layouts.

Inrush Current Limiters (ICL) FAQ

What is the maximum steady-state current for the SL1222101?

The maximum steady-state current rating is 1 A.

Does the SL1222101 have safety certifications?

Yes, the component is UL approved for use in electrical circuits.