744844221

Overview

The Würth Elektronik 744844221 is a single-phase common mode choke from the WE-ExB series, designed for power line applications. It features an inductance of 220 µH and supports a maximum DC current of 12 A. The component has a maximum DC resistance of 9 mΩ (9000 µΩ) and operates within a temperature range of -40°C to +125°C. Rated for 250V, it utilizes through-hole termination for PCB mounting.

Feature Summary

• Provides effective common mode noise suppression for single-phase power lines
• Engineered for high current handling up to 12 A with low impedance
• Constructed for robust performance in demanding thermal environments

Applications

• EMI mains filtering in industrial equipment
• Power supply input stages
• Electromagnetic compatibility (EMC) mitigation in AC power circuits

Procurement Notes

Verify that the specific order matches the WE-ExB series designation and through-hole package type. Confirm the 220 µH inductance and 12 A current rating align with the circuit requirements. Ensure the supplier provides official datasheets to validate the 9 mΩ DCR specification and operating temperature limits before integration.

Selection Notes

Select this component when designing single-phase AC power inputs requiring significant common mode attenuation. The 12 A rating suits high-power applications, while the 220 µH value targets lower frequency noise. Verify that the through-hole form factor fits the mechanical constraints of the target enclosure and PCB layout.

Part Context

This part belongs to the WE-ExB series of common mode chokes by Würth Elektronik. These components are specialized for power line filtering, distinguishing them from signal line or RF chokes. The series focuses on high-current capabilities and compliance with electromagnetic interference standards for mains-powered devices.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.