SL121R010B

Inrush Current Limiters (ICL) Overview

The SL121R010B is a radial leaded negative temperature coefficient (NTC) thermistor designed as an inrush current limiter. It features a nominal resistance of 1 Ohm with a tolerance of ±20%. The component supports a steady-state current rating of 10 A and operates at voltage ratings up to 115 VAC or 230 VAC. It has a maximum diameter of 13 mm and utilizes a bulk packaging format for PCB mounting applications.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high initial charging currents during power-up sequences
• Utilizes NTC material properties to reduce resistance as operating temperature increases
• Offers robust protection for sensitive electronic components against thermal stress

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuits
• Motor drive systems

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'B' against the manufacturer datasheet to confirm exact dimensional tolerances and marking codes. Ensure the selected variant matches the required steady-state current and peak energy absorption capabilities for the target circuit design before finalizing procurement orders.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the 1 Ohm nominal resistance value suitable for low-voltage AC applications. Consider the 10 A current rating and 13 mm package size when evaluating thermal management requirements and available PCB real estate for the specific power supply topology.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Vishay Ametherm SL12 series, which comprises radial leaded NTC inrush current limiters. The series provides standardized dimensions and electrical characteristics for protecting various electronic loads from damaging startup currents in consumer and industrial equipment.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with Vishay Ametherm SL121R010 if the 'B' suffix denotes a specific packaging or marking variation rather than a functional change. Verify that substitute parts maintain identical 1 Ohm resistance and 10 A current ratings.