MS1540004A

Inrush Current Limiters (ICL) Overview

The MS1540004A is an NTC inrush current limiter from the MegaSurge series by Vishay Ametherm. It features a nominal resistance of 40 Ohms with a tolerance of ±25% at 25°C. The component supports a maximum steady-state current of 4.1 A and exhibits a low hot resistance of 280 mOhms. It has a cylindrical diameter of 0.670 inches (17.00 mm) and a lead spacing of 0.307 inches (7.80 mm).

Inrush Current Limiters (ICL) Feature Summary

• Utilizes negative temperature coefficient thermistor technology to limit initial surge currents.
• Provides high thermal stability for repeated switching cycles in power circuits.
• Features low residual resistance to minimize power loss during steady-state operation.

Inrush Current Limiters (ICL) Applications

• Capacitive load inrush current limiting
• DC power supply input protection
• General circuit protection against surge currents

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official datasheet to confirm it does not alter electrical characteristics or physical dimensions compared to the base model. Ensure compliance with RoHS3 and REACH requirements as specified in the product documentation before finalizing procurement.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on its 40 Ohm nominal resistance and 4.1 A steady-state current rating. Consider the 17.00 mm diameter and 7.80 mm lead spacing for mechanical fitment. Verify that the 280 mOhms hot resistance meets the system's efficiency requirements for continuous operation.

Inrush Current Limiters (ICL) Part Context

This part belongs to the MegaSurge series of inrush current limiters, designed for robust performance in electronic equipment. It serves as a critical protection element against high transient currents, ensuring the reliability of downstream components in power applications.

Inrush Current Limiters (ICL) Replacement Considerations

MS1540004B is a confirmed substitute with identical electrical specifications including 40 Ohms resistance and 4.1 A current rating. Verify package compatibility and lead spacing when substituting.