MS22 12102-A

Inrush Current Limiters (ICL) Overview

The MS22 12102-A is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm MS series. Designed for radial leaded mounting, this component features a nominal resistance of 120 ohms with a tolerance of ±25%. It supports a maximum steady-state current of 2 A at an ambient temperature up to 65°C. The device utilizes a 23 mm diameter body, providing robust mechanical stability for electronic power supply applications requiring effective surge protection during initial power-up phases.

Inrush Current Limiters (ICL) Feature Summary

• Utilizes NTC thermistor technology to provide high initial resistance that decreases as temperature rises
• Radial leaded construction facilitates through-hole PCB integration and secure mechanical mounting
• Engineered to limit peak inrush currents while maintaining low steady-state power dissipation

Inrush Current Limiters (ICL) Applications

• Switching mode power supplies (SMPS)
• AC-DC converter input stages
• Electronic ballast circuits
• Consumer appliance power inputs

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct package dimensions and electrical ratings. Confirm that the selected variant matches the required steady-state current and resistance tolerance for the target circuit design. Cross-reference the part number with official Vishay documentation to avoid confusion between similar MS series components.

Inrush Current Limiters (ICL) Selection Notes

Select this component based on the circuit's maximum operating voltage and expected inrush current profile. Ensure the thermal environment allows the thermistor to reach its low-resistance state without exceeding maximum junction temperature limits. Evaluate the physical space constraints on the PCB to accommodate the 23 mm body size and radial leads.

Inrush Current Limiters (ICL) Part Context

This part belongs to the MS series of inrush current limiters manufactured by Vishay Ametherm. The series offers various resistance values and current ratings tailored for different power levels. The MS22 designation indicates a specific body size category within the product line, distinguishing it from smaller or larger variants in the same family.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include the MS22 12102-B and MS22 12102, provided they meet identical electrical specifications. Verify compatibility with SL22 12102 equivalents if alternative sourcing is necessary. Always confirm pinout and mechanical footprint alignment before integrating replacement parts.