ICL470D20MIC

Inrush Current Limiters (ICL) Overview

The ICL470D20MIC is a Negative Temperature Coefficient (NTC) thermistor from the Eaton Electronics ICL series, designed as an inrush current limiter. It features a nominal resistance of 4.7 Ohms at standard reference conditions and utilizes a B1 beta definition with a Beta constant of 2950 K. The component has a physical size of 20 mm and employs I-lead termination style. It carries a J tolerance for its Beta parameter, ensuring specific thermal response characteristics suitable for electronic circuit protection applications.

Inrush Current Limiters (ICL) Feature Summary

• Functions as an inrush current limiter to protect sensitive electronic components during power-up phases
• Utilizes NTC material properties to provide high initial resistance that decreases rapidly as temperature rises
• Features I-lead construction for reliable mechanical mounting and electrical connection on printed circuit boards

Inrush Current Limiters (ICL) Applications

• Power supply input stages for limiting capacitive charging currents
• Protection of semiconductor devices against transient overcurrent events
• Consumer electronics assemblies requiring controlled power ramp-up sequences

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific manufacturing date code and lot traceability upon receipt to ensure compliance with project quality standards. Confirm that the received components match the Eaton Electronics part number ICL470D20MIC exactly, including lead finish and package dimensions. Cross-reference the datasheet specifications regarding the 2950 K Beta value and 4.7 Ohm resistance to validate component authenticity before integration into production lines.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 4.7 Ohm cold-state resistance is required for inrush current control in circuits operating within the thermal limits defined by the 20 mm package size. The 2950 K Beta coefficient indicates specific temperature-resistance behavior that must align with the system's thermal management design. Ensure the I-lead configuration is compatible with the target PCB footprint and assembly process requirements.

Inrush Current Limiters (ICL) Part Context

This part belongs to the Eaton Electronics ICL family of NTC thermistors, which are specialized for inrush current limiting rather than general temperature sensing. Unlike standard sensing thermistors, these components are engineered to handle significant energy dissipation during the brief period of high current flow. The D20 suffix denotes the specific dimensional profile and lead style associated with this product line.

Inrush Current Limiters (ICL) Replacement Considerations

Direct substitutes include other Eaton ICL series parts with matching 4.7 Ohm resistance and similar Beta constants, such as variants with different lead lengths or package sizes if mechanical constraints allow. Cross-manufacturer replacements require careful verification of peak current ratings, steady-state resistance, and thermal time constants to ensure equivalent circuit protection performance.