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Product Detailed Parameters
- Description：CMC 18MH 300MA 2LN TH
- Series：WE-TFCH
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：300mA
- DC Resistance (DCR) (Max)：3.1Ohm
- Voltage Rating - DC：-
- Voltage Rating - AC：400V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.669" L x 0.600" W (17.00mm x 15.23mm)
- Height (Max)：0.481" (12.23mm)
- Package / Case：Horizontal, 4 PC Pin
- Inductance @ Frequency：18 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 744861180 is a WE-TFCH series common mode power line choke designed for horizontal PCB mounting. It features an inductance of 18 mH at a test frequency of 10 kHz, with a tolerance range of -30% to +50%. The component supports a maximum DC current of 300 mA and exhibits a maximum DC resistance of 3.1 Ohms. It operates within a temperature range of -40°C to +125°C. Physical dimensions are 17 mm length, 15.23 mm width, and 12.32 mm height, utilizing through-hole termination with an 8 mm lead spacing.
Feature Summary
- Horizontal orientation design for space-constrained PCB layouts
- Ferrite core construction for effective EMI suppression
- Through-hole termination for robust mechanical stability
Applications
- Power line EMI filtering
- Common mode noise suppression in electronic circuits
- RF circuit interference reduction
Procurement Notes
Verify the specific inductance tolerance requirements against the datasheet specifications before procurement. Confirm that the physical footprint and lead spacing match the target PCB layout. Ensure the operating environment remains within the specified temperature range to maintain performance integrity. Cross-reference the manufacturer part number with official distributor catalogs to ensure authenticity.
Selection Notes
Select this component when horizontal mounting is required to minimize board profile. Choose based on the 18 mH inductance value suitable for low-frequency noise attenuation. Consider the 300 mA current rating for appropriate load handling. Evaluate the 3.1 Ohm DC resistance impact on circuit efficiency. Verify compatibility with through-hole assembly processes.
Part Context
This component belongs to the WE-TFCH series of common mode chokes from Würth Elektronik. These components are engineered for power line applications requiring effective electromagnetic interference filtering. The series offers various inductance values tailored for different noise suppression needs while maintaining compact form factors suitable for modern electronics manufacturing.
Replacement Considerations
The Würth Elektronik 744861250 is identified as an equivalent alternative. This substitute offers similar functionality but differs in electrical characteristics, specifically providing higher current margin and lower DC resistance compared to the 744861180.
