SL1220003H

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL1220003H is a Negative Temperature Coefficient (NTC) thermistor designed as an inrush current limiter. It belongs to the SL12 series and features a disc diameter of 13 mm. The component has a nominal resistance of 20 Ohms with a tolerance of 20%. It is rated for a steady-state current of 3 A and supports voltage ratings of 115 VAC and 230 VAC. The device utilizes radial leads with a spacing of 7.8 mm for through-hole PCB mounting.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective limitation of high inrush currents during power-up sequences
• Utilizes NTC material properties to reduce resistance as temperature increases
• Supports standard AC line voltages for broad compatibility

Inrush Current Limiters (ICL) Applications

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

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific lead time requirements with authorized distributors, as manufacturing timelines may vary. Confirm that the 20% resistance tolerance aligns with the circuit design specifications. Ensure the thermal management plan accounts for the self-heating characteristics inherent to this component type during operation.

Inrush Current Limiters (ICL) Selection Notes

Select this model when a 20 Ohm initial resistance is required for the specific application. The 3 A current rating must exceed the maximum expected inrush magnitude. Consider the 13 mm physical size constraints within the assembly layout. Validate that the radial lead configuration matches the target printed circuit board footprint.

Inrush Current Limiters (ICL) Part Context

This component is part of the SL12 series from Vishay Ametherm, specializing in inrush current limiting solutions. The series offers various resistance and current ratings to suit different power levels. The SL1220003H specifically addresses applications requiring moderate current handling with a defined 20 Ohm starting impedance.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include other Vishay Ametherm parts within the SL12 series that match the 20 Ohm resistance and 3 A current rating. Verify that any alternative maintains the same 13 mm diameter and radial lead spacing to ensure mechanical compatibility.