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Product Detailed Parameters
- Description：CMC 25MH 250MA 2LN TH
- Series：WE-TFCH
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：250mA
- DC Resistance (DCR) (Max)：3.6Ohm
- 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：25 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 744861250 is a common mode filter choke from the WE-TFCH Type UT series, designed for power line applications. It features an inductance of 25 mH with a maximum DC resistance of 3.6 Ohms and a rated current of 250 mA. The component utilizes through-hole mounting with an 8 mm lead spacing. It operates within a temperature range of -40°C to +125°C and is tested at 10 kHz.
Feature Summary
- Provides common mode noise suppression for power lines
- Utilizes through-hole technology for PCB integration
- Designed for high-temperature operational environments
Applications
- Power supply input filtering
- EMI suppression in electronic equipment
- Signal integrity protection in data lines
Procurement Notes
Verify the specific datasheet revision to confirm mechanical dimensions and electrical tolerances match design requirements. Ensure the through-hole footprint aligns with the PCB layout. Confirm compliance with relevant safety standards if used in certified end-products. Cross-reference the manufacturer part number to avoid confusion with similar series components.
Selection Notes
Select this component when a 25 mH inductance is required for common mode noise reduction. The 250 mA current rating suits low-power signal or control line applications. Consider the 3.6 Ohm DC resistance impact on voltage drop. The through-hole package is suitable for manual assembly or selective wave soldering processes.
Part Context
This component belongs to the WE-TFCH Type UT series of common mode chokes. It is manufactured by Würth Elektronik, a specialist in passive electronic components. The series is engineered for robust performance in demanding electromagnetic interference scenarios across various industrial and consumer electronics sectors.
Replacement Considerations
Direct substitutes include other 25 mH common mode chokes with comparable current ratings and through-hole packages. Verify that alternative parts meet the same thermal and electrical specifications. Check for pin compatibility and physical size constraints before substitution.
