SL2250004B

Overview

The SL2250004B is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm SL22 series. It features a nominal resistance of 50 Ohms with a tolerance of ±20% and a continuous current rating of 4 A. The device has a diameter of 22 mm (0.866 inches). It is designed to absorb high inrush energy, capable of withstanding up to 80 Joules during equipment startup.

Feature Summary

• Provides high initial resistance to limit surge currents upon power application
• Utilizes NTC thermistor technology for automatic resistance reduction after startup
• Engineered to withstand significant inrush energy absorption events

Applications

• Power supply input stages
• Industrial equipment startup protection
• Consumer electronics surge suppression

Procurement Notes

Verify the specific datasheet version for the SL2250004B to confirm thermal characteristics and pulse energy ratings. Ensure the application environment temperature aligns with the component's operating limits. Cross-reference the 4 A continuous current rating against peak load requirements. Confirm that the 50 Ohm initial resistance meets the circuit's inrush limiting specifications.

Selection Notes

Select this component based on the required steady-state current of 4 A and the need for 50 Ohms initial impedance. Evaluate the 80 Joule energy handling capacity against the system's potential surge levels. Consider the 22 mm package size for mechanical clearance. Verify compatibility with the target voltage ratings and ambient operating conditions.

Part Context

This part belongs to the Vishay Ametherm SL22 series of leaded NTC inrush current limiters. These devices are designed for through-hole mounting and offer robust protection against high transient currents. The series provides standardized sizes and electrical parameters for common industrial and commercial power applications.

Replacement Considerations

The MS2250004 is a related variant within the Vishay portfolio. Verify if the MS series offers identical electrical parameters or different physical dimensions. Consult official substitution guides to ensure functional equivalence regarding current handling and resistance values.