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Product Detailed Parameters
- Description：CMC 39MH 400MA 2LN TH
- Series：WE-LF
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：400mA
- DC Resistance (DCR) (Max)：1.7Ohm
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.709" L x 0.709" W (18.00mm x 18.00mm)
- Height (Max)：0.512" (13.00mm)
- Package / Case：Horizontal, 4 PC Pin
- Inductance @ Frequency：39 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 7446620039 is a current-compensated common mode choke from the WE-LF series, designed for mains power line filtering. It features a through-hole mounting style with four pins and a horizontal package configuration. The component provides an inductance of 39 mH at 10 kHz, with a maximum DC resistance of 1.7 ohms and a rated current of 400 mA. It operates within a temperature range of -40°C to 125°C and supports AC voltages up to 250V.
Feature Summary
- Current-compensated design for effective common mode noise suppression on power lines
- Through-hole construction suitable for robust PCB integration
- Wide operating temperature range ensuring reliability in varied environments
Applications
- Mains power line filtering in electronic equipment
- Common mode noise suppression in AC power inputs
- EMI reduction in consumer and industrial power supplies
Procurement Notes
Verify the specific part number against official manufacturer documentation to ensure correct specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Check for any recent product change notices that may affect marking or packaging details before finalizing procurement orders.
Selection Notes
Select this component when a through-hole common mode choke is required for mains power applications. Ensure the 400 mA current rating and 39 mH inductance meet the circuit's noise suppression needs. Verify that the physical dimensions and pin configuration fit the available PCB space and assembly requirements.
Part Context
This component belongs to the WE-LF series of common mode chokes specifically engineered for mains power lines. The series offers various inductance values and current ratings to suit different power filtering requirements. The 7446620039 variant provides a balanced solution for moderate current applications requiring significant noise attenuation.
Replacement Considerations
Consult official substitution guides for compatible alternatives within the WE-LF series or other manufacturers' equivalent through-hole common mode chokes. Ensure replacement parts match the inductance, current rating, and physical footprint requirements.
