SL12 1R308-B

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL12 1R308-B is a Negative Temperature Coefficient (NTC) thermistor designed for inrush current limiting applications. It features a nominal resistance of 1.3 Ohms with a tolerance of ±20% at 25°C. The component supports a maximum steady-state current of 8 A and has a body diameter of 12 mm. It utilizes radial leads with a spacing of 7.5 mm for through-hole mounting.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences
• Utilizes NTC thermistor technology to reduce resistance as temperature increases
• Designed for robust protection of sensitive electronic components against surge damage

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuit protection
• Motor drive inrush management

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix, such as -B, to ensure compliance with required packaging or marking specifications. Confirm that the 1.3 Ohm resistance value aligns with the system's thermal design requirements. Check for UL and CSA certification marks on the datasheet to validate safety compliance for the target market. Ensure the 8 A steady-state current rating exceeds the operational load under all expected conditions.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the required 1.3 Ohm initial resistance to limit peak inrush current effectively. Ensure the 8 A continuous current rating accommodates the maximum operating load without overheating. Verify that the 12 mm package size fits within the available PCB area. Consider the thermal environment to ensure the thermistor reaches its low-resistance state promptly after startup.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL12 series of inrush current limiters from Vishay Ametherm. The series offers various resistance and current ratings tailored for different power levels. These components are widely used in industrial and consumer electronics to protect circuits from the high transient currents associated with charging capacitive loads.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include the SL121R308 variant. Verify that any replacement maintains the same 1.3 Ohm resistance, 8 A current rating, and 12 mm diameter to ensure mechanical and electrical compatibility.