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Product Detailed Parameters
- Description：CMC 20MH 500MA 2LN TH
- Series：WE-CMB
- Mfr：Würth Elektronik
- Package：Tray
- Filter Type：Power Line
- Number of Lines：2
- Current Rating (Max)：500mA
- DC Resistance (DCR) (Max)：1Ohm
- Voltage Rating - DC：-
- Voltage Rating - AC：250V
- Operating Temperature：-40°C ~ 125°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Through Hole
- Size / Dimension：0.591" L x 0.295" W (15.00mm x 7.50mm)
- Height (Max)：0.689" (17.50mm)
- Package / Case：Vertical, 4 PC Pin
- Inductance @ Frequency：20 mH @ 10 kHz
- Impedance @ Frequency：-
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 744821120 is a WE-CMB series common mode choke designed for power line applications. It features an inductance of 20 mH and supports a maximum DC current of 500 mA. The component has a maximum DC resistance of 1 Ohm and operates within a temperature range of -40°C to +125°C. It utilizes a through-hole mounting style with a lead spacing of 4.5 mm.
Feature Summary
- Provides common mode noise suppression for power lines
- Constructed for high-temperature stability up to 125°C
- Designed for through-hole PCB integration
Applications
- Power line filtering
- EMI suppression in electronic circuits
- Common mode noise reduction
Procurement Notes
Verify the specific datasheet version for the 744821120 to confirm mechanical dimensions and electrical tolerances against your design requirements. Ensure compatibility with through-hole assembly processes given the 4.5 mm lead spacing. Cross-reference the 500 mA current rating with your system's peak load conditions to prevent saturation.
Selection Notes
Select this component when a 20 mH inductance value is required for common mode interference mitigation in power supply inputs. The 1 Ohm DC resistance should be evaluated against allowable voltage drop constraints. Consider the through-hole package if surface mount options are unsuitable for the target board layout or mechanical stress requirements.
Part Context
This part belongs to the WE-CMB series from Würth Elektronik, which specializes in common mode chokes for power line applications. The series includes variants like WE-CMB HC and WE-CMB NiZn, offering different core materials and performance characteristics for various electromagnetic interference suppression needs.
Replacement Considerations
Check for direct substitutes within the WE-CMB series that match the 20 mH inductance and 500 mA current rating. Verify that any alternative maintains the same 4.5 mm lead spacing and 1 Ohm DC resistance to ensure mechanical and electrical compatibility without redesigning the footprint.
