744822120

Overview

The Würth Elektronik 744822120 is a through-hole common mode choke from the WE-CMB series. It features an inductance of 20 mH at 10 kHz and supports a maximum DC current of 500 mA. The component has a maximum DC resistance (DCR) of 540 mOhms. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Provides common mode noise suppression for power lines
• Designed for through-hole PCB mounting
• Shielded construction to minimize electromagnetic interference

Applications

• Power line filtering in electronic equipment
• Noise suppression in AC/DC converter circuits
• EMI reduction in industrial control systems

Procurement Notes

Verify the specific datasheet version for precise impedance curves and saturation characteristics. Confirm that the through-hole package dimensions align with the target PCB footprint. Ensure the 500 mA current rating meets the application's peak load requirements without excessive thermal rise.

Selection Notes

Select this component when high inductance values are required for low-frequency noise attenuation. The through-hole format offers mechanical stability for heavy cables or high-vibration environments. Compare DCR losses against alternative SMD options if space constraints exist, noting the higher profile of this through-hole design.

Part Context

This part belongs to the WE-CMB series of common mode chokes by Würth Elektronik. These components are engineered for robust performance in power supply applications. The series typically utilizes ferrite cores optimized for broadband noise suppression across various frequency ranges.

Replacement Considerations

Check for direct substitutes within the WE-CMB series with similar inductance and current ratings. Verify pin compatibility and physical dimensions before replacing with other manufacturers' through-hole chokes.