MS22 12103-A

Inrush Current Limiters (ICL) Overview

The MS2212103-A is a negative temperature coefficient (NTC) thermistor belonging to the MegaSurge MS22 series, manufactured by Vishay Ametherm. Designed as an inrush current limiter (ICL), this component features a disc diameter of 22 mm and a nominal resistance of 120 Ohms at 25°C with a tolerance of ±25%. It supports a steady-state current rating of 3 A and utilizes radial leads for through-hole mounting. The device is engineered to absorb high energy inputs ranging from 75 to 900 joules, providing robust protection against surge currents in electronic circuits.

Inrush Current Limiters (ICL) Feature Summary

• High energy absorption capability up to 900 joules for effective surge suppression
• Robust construction designed to withstand significant steady-state current loads
• Negative temperature coefficient characteristic for automatic resistance reduction during operation

Inrush Current Limiters (ICL) Applications

• Plasma cutting tools
• MRI machines
• Toroidal transformers up to 4kVA
• AC motor drives
• Audio amplifiers

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix designation when ordering, as variations may exist within the product line. Confirm that the required steady-state current and energy absorption ratings align with the circuit design specifications. Ensure compatibility with through-hole mounting processes and verify lead spacing requirements against the PCB layout constraints prior to procurement.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on its 120 Ohm resistance value and 3 A current handling capacity. Consider the 22 mm physical size for adequate heat dissipation and mechanical stability. Evaluate the application's peak inrush energy requirements to ensure they fall within the specified 75 to 900 joule range for optimal performance and longevity.

Inrush Current Limiters (ICL) Part Context

This part belongs to the MegaSurge MS22 series of inrush current limiters. The series is characterized by large disc sizes and high energy ratings, distinguishing it from smaller, lower-power NTC thermistors. It serves as a critical protective element in power supply inputs and transformer primary circuits where high initial charging currents are prevalent.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes must match the 120 Ohm resistance, 3 A rating, and 22 mm form factor. Cross-reference with other manufacturers' ICLs offering similar energy absorption capabilities. Verify that any alternative component maintains the same thermal characteristics and mounting dimensions to ensure seamless integration without redesigning the PCB footprint.