7448640396

Overview

The Würth Elektronik 7448640396 is a current-compensated common mode power line choke from the WE-FC series. It features an inductance of 1.8 mH and supports a maximum DC current of 1.65 A with a typical DC resistance of 0.15 Ohms. The component utilizes a closed rectangular ferrite core and a three-section winding design to ensure excellent high-frequency performance and symmetrical interference suppression with approximately 1% stray inductance.

Feature Summary

• Current-compensated design offering roughly twice the leakage inductance compared to comparable toroidal chokes
• Three-section winding structure for superior high-frequency noise suppression
• Closed rectangular ferrite core construction ensuring low stray inductance

Applications

• Power line filtering in electronic equipment
• Common mode noise suppression in AC/DC power supplies
• EMI reduction in industrial control systems

Procurement Notes

Verify the specific electrical parameters against the official datasheet before integration, as values may vary by revision. Confirm that the package dimensions and pin configuration match the target PCB layout. Ensure the operating temperature range meets the environmental requirements of the final assembly. Cross-reference the manufacturer part number to avoid confusion with similar series components.

Selection Notes

Select this component when high leakage inductance is required for effective common mode noise attenuation. The current-compensated architecture makes it suitable for applications where differential mode interference must be minimized. Evaluate the thermal performance under maximum load conditions to ensure the 0.15 Ohm resistance does not cause excessive heating. Consider the physical size constraints relative to the available board space.

Part Context

This component belongs to the WE-FC series of common mode chokes manufactured by Würth Elektronik. The series is characterized by its use of closed rectangular ferrite cores and specialized winding techniques to achieve high performance in EMI suppression applications. These chokes are designed for through-hole mounting and are intended for use in power line filtering scenarios.

Replacement Considerations

Direct substitutes within the same series include part numbers such as 7448640403 and 7448640417, which offer different inductance and current ratings. Verify compatibility based on specific circuit requirements rather than assuming interchangeability across all series variants.