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Product Detailed Parameters
- Description：CMC 27MH 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)：1.2Ohm
- 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：27 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 7446620027 is a surface-mount common mode choke from the WE-LF series, designed for power line filtering. It features an inductance of 27 mH at 10 kHz and supports two lines. The component has a maximum DC resistance of 1.2 ohms and a rated current of 400 mA. It operates within a temperature range of -40°C to +125°C.
Feature Summary
- Surface-mount construction for automated PCB assembly
- Common mode noise suppression for power lines
- High inductance value for effective filtering
Applications
- Power supply input filtering
- EMI suppression in electronic equipment
- Signal integrity protection in data lines
Procurement Notes
Verify the specific suffix and package variant against the official datasheet to ensure compatibility with the target design. Confirm that the rated current and inductance values meet the circuit requirements. Check RoHS compliance status if required by the project specifications. Ensure the operating temperature range aligns with the environmental conditions of the final application.
Selection Notes
Select this component when high inductance is required for common mode noise reduction in space-constrained designs. Consider the 400 mA current rating and 1.2 ohm DCR for voltage drop calculations. Evaluate the thermal performance within the -40°C to +125°C range. Compare against other WE-LF variants if different current or inductance levels are needed.
Part Context
This part belongs to the WE-LF series of common mode chokes from Würth Elektronik. These components are engineered for efficient noise suppression in compact surface-mount applications. The series offers various inductance and current ratings to suit different power line filtering needs across industrial and consumer electronics.
Replacement Considerations
Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement matches the 27 mH inductance, 400 mA current rating, and 1.2 ohm DCR specifications. Verify package dimensions and pin configuration compatibility before integration.
