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Product Detailed Parameters
- Description：CMC 12MH 400MA 2LN TH
- Series：WE-TFC
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：400mA
- DC Resistance (DCR) (Max)：2Ohm
- 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 0.433" W (17.00mm x 11.00mm)
- Height (Max)：0.669" (17.00mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：12 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 744862120 is a current-compensated common mode choke from the WE-TFC series, designed for power line filtering in general electronic equipment. It features a 12 mH inductance measured at 10 kHz and supports a maximum DC current of 400 mA with a maximum DC resistance of 2 Ohms. The component utilizes a vertical through-hole package with four pins and an 8 mm lead spacing. Its physical dimensions are 17.00 mm in length, 11.00 mm in width, and 17.00 mm in height. It operates within a temperature range of -40°C to +125°C and complies with RoHS3 specifications.
Feature Summary
- Current-compensated design for effective common mode noise suppression
- Vertical through-hole mounting configuration for PCB integration
- Rated for AC voltages up to 400V
Applications
- Power line filtering in general electronic equipment
- EMI suppression in AC/DC power supply inputs
- Noise reduction in industrial control systems
Procurement Notes
Verify the specific part number against official Würth Elektronik datasheets to ensure compatibility with circuit requirements. Confirm that the 400 mA current rating and 12 mH inductance meet the design specifications. Check for any recent Product Change Notifications (PCN) regarding packaging or material updates. Ensure the through-hole footprint matches the PCB layout constraints. Validate compliance with relevant environmental standards such as RoHS3 before finalizing procurement.
Selection Notes
Select this component when a current-compensated common mode choke is required for power line applications. The WE-TFC series offers high inductance values suitable for low-frequency noise filtering. Consider the vertical package style if space constraints allow for through-hole mounting. The 400 mA rating defines the maximum continuous current capacity. Evaluate the thermal performance within the specified operating temperature range to ensure reliability under load conditions.
Part Context
The 744862120 belongs to the WE-TFC series of current-compensated chokes manufactured by Würth Elektronik. This series is engineered for robust performance in power line filtering tasks. The component is classified as a common mode choke intended for use in general electronic equipment. It provides a reliable solution for mitigating electromagnetic interference in AC power lines while maintaining signal integrity.
Replacement Considerations
Consult official Würth Elektronik documentation for verified substitute part numbers within the WE-TFC series. Ensure any replacement maintains identical inductance, current rating, and physical dimensions. Verify that alternative components meet the same electrical and environmental specifications.
