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Product Detailed Parameters
- Description：CMC 4.2MH 2A 2LN TH
- Series：WE-LF
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：2A
- DC Resistance (DCR) (Max)：120mOhm
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.925" L x 0.630" W (23.50mm x 16.00mm)
- Height (Max)：1.004" (25.50mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：4.2 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 7446222004 is a current-compensated common mode choke from the WE-LF series, designed for mains power line filtering. It features a 4.2 mH inductance with a 30% tolerance and supports a maximum DC current of 2 A. The component exhibits a maximum DC resistance of 120 mOhms. It utilizes through-hole mounting with four pins and operates within a temperature range of -40°C to +125°C. Physical dimensions are approximately 24.5 mm in length, 17 mm in width, and 29 mm in height.
Feature Summary
- Current-compensated design suitable for AC mains applications
- Through-hole construction for robust PCB integration
- Wide operating temperature range for diverse environmental conditions
Applications
- Mains power line filtering in general electronic equipment
- EMI suppression for AC input stages
- Common mode noise reduction in power supplies
Procurement Notes
Verify the specific manufacturer part number against official Wurth Elektronik documentation to ensure authenticity. Confirm that the component meets required RoHS compliance standards for your region. Check for any recent Product Change Notifications (PCN) regarding material or manufacturing updates. Ensure the through-hole footprint matches your PCB layout constraints before ordering.
Selection Notes
Select this component when designing circuits requiring common mode noise attenuation on AC lines. The 2 A current rating must align with the maximum load current of the application. Consider the physical size constraints as the component has significant vertical height. Verify that the 4.2 mH inductance provides sufficient impedance at the target interference frequencies.
Part Context
This component belongs to the WE-LF series of common mode chokes manufactured by Würth Elektronik. The series is specifically engineered for use in general electronic equipment connected to mains power. These chokes are designed to suppress electromagnetic interference generated by or affecting the power supply inputs of various devices.
Replacement Considerations
The Würth Elektronik 7446222002 is a documented alternative within the same WE-LF series. It shares similar mechanical and electrical characteristics but offers a lower inductance value of 2.2 mH. Verify that the reduced inductance meets the specific filtering requirements of the circuit before substitution.
