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Product Detailed Parameters
- Description：CMC 18MH 500MA 2LN TH
- Series：WE-FC
- Mfr：Würth Elektronik
- Package：Tube
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：500mA
- DC Resistance (DCR) (Max)：1.17Ohm (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：18 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 7448640403 is a WE-FC series common mode power line choke designed for through-hole mounting. It features an inductance of 18 mH at 10 kHz and supports a maximum DC current of 500 mA. The component has a typical DC resistance (DCR) of 1.17 Ohms and is rated for AC voltages up to 250 V. Operating within a temperature range of -40°C to +125°C, it utilizes a vertical package with four pins. Physical dimensions are approximately 21.20 mm x 21.20 mm in footprint with a maximum height of 17.80 mm.
Feature Summary
- Provides effective suppression of common mode noise on power lines
- Designed for robust through-hole PCB integration
- Capable of handling high differential currents with low impedance
Applications
- Power supply input filtering
- EMI suppression in industrial equipment
- Consumer electronics power stages
Procurement Notes
Verify the specific datasheet revision when ordering, as product change notifications indicate potential updates to the WE-FC series specifications. Confirm that the 18 mH inductance value aligns with your circuit requirements, noting that some sources may reference similar variants with slightly different ratings. Ensure the through-hole pin configuration matches your board layout constraints before finalizing procurement.
Selection Notes
Select this component when a high-inductance common mode choke is required for power line applications. The 500 mA current rating suits moderate power stages. Consider the physical size and through-hole requirement against surface-mount alternatives if space is limited. Verify thermal performance at the maximum operating temperature of 125°C to ensure reliability under load.
Part Context
This part belongs to the Würth Elektronik WE-FC series, which specializes in common mode chokes for power line filtering. The series offers various inductance values and current ratings to suit different EMI suppression needs. The 7448640403 specifically targets applications requiring significant noise attenuation at lower frequencies while maintaining structural integrity through through-hole technology.
Replacement Considerations
Check for direct substitutes within the WE-FC series that match the 18 mH inductance and 500 mA current rating. Ensure any replacement maintains the same through-hole package dimensions and pinout to avoid PCB redesign.
