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Product Detailed Parameters
- Description：CMC 3.9MH 1A 2LN TH
- Series：WE-FC
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：1A
- DC Resistance (DCR) (Max)：280mOhm (Typ)
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.835" L x 0.835" W (21.20mm x 21.20mm)
- Height (Max)：0.701" (17.80mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：3.9 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 7448640399 is a WE-FC series common mode power line choke designed for through-hole mounting. It features an inductance of 3.9 mH at 10 kHz and supports two lines. The component has a maximum DC current rating of 1 A and a typical DC resistance (DCR) of 280 mOhm. Rated for AC voltages up to 250 V, it operates within a temperature range of -40°C to +125°C. The package dimensions are approximately 15.5 mm x 13.2 mm with a maximum height of 10.5 mm.
Feature Summary
- Provides high suppression of asymmetric interferences on power lines
- Compact design suitable for space-constrained applications
- Through-hole construction for robust PCB integration
Applications
- Power supply input filtering
- EMI suppression in electronic equipment
- Common mode noise reduction in AC/DC converters
Procurement Notes
Verify the specific datasheet version when ordering, as Wurth Elektronik issues Product Change Notifications (PCN) that may update mechanical or electrical specifications over time. Confirm the exact pin configuration and footprint compatibility with your PCB layout before finalizing procurement. Ensure the selected variant matches the required current and inductance ratings for your specific circuit design.
Selection Notes
Select this component when a through-hole solution is required for common mode noise suppression in power line applications. Compare the 3.9 mH inductance and 1 A current rating against circuit requirements to ensure adequate filtering without excessive voltage drop. Consider the operating temperature range and physical dimensions to verify fit within the enclosure and thermal environment.
Part Context
This part belongs to the WE-FC series of common mode chokes from Würth Elektronik. The series is characterized by compact designs intended for effective interference suppression. These components are widely used in industrial and consumer electronics where reliable EMI filtering on power inputs is critical for compliance and performance.
Replacement Considerations
Check for direct substitutes within the WE-FC series with similar inductance and current ratings. Verify that any replacement maintains the same through-hole package dimensions and pinout to ensure board compatibility without redesign.
