744212181

Overview

The Würth Elektronik 744212181 is a WE-SL1 series surface-mount common mode choke designed for signal line filtering. It features an inductance of 180 µH at 100 kHz and provides an impedance of 1 kOhms at 40 MHz. The component supports a maximum DC current of 300 mA with a maximum DC resistance of 250 mOhms. Rated for 80V DC, it operates within a temperature range of -40°C to 105°C. The device utilizes a horizontal package with four J-leads, measuring 6.50 mm in length, 3.60 mm in width, and 1.80 mm in height.

Feature Summary

• Provides effective noise suppression for differential signal lines through high common-mode impedance characteristics.
• Utilizes a compact surface-mount footprint suitable for space-constrained printed circuit board layouts.
• Constructed with ferrite core material to maintain stable performance across specified operating temperatures.

Applications

• High-speed data interface protection
• Signal line filtering in electronic equipment
• Common mode noise reduction in communication circuits

Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging format, such as tape and reel or cut tape, matches production requirements. Confirm that the RoHS compliance status aligns with environmental regulations applicable to the target market. Ensure the selected variant meets the required moisture sensitivity level for storage and reflow soldering processes without additional baking procedures.

Selection Notes

Select this component when designing circuits requiring 180 µH inductance for common mode noise attenuation at frequencies around 40 MHz. The 300 mA current rating must accommodate the maximum expected signal current without saturation. Verify that the 250 mOhms DC resistance does not introduce excessive voltage drop in the signal path. Ensure the physical dimensions fit within the designated PCB land pattern area.

Part Context

This part belongs to the WE-SL1 series of surface-mount common mode chokes from Würth Elektronik. The series offers various inductance values tailored for different filtering needs while maintaining consistent physical footprints. These components are engineered for reliability in industrial and consumer electronics applications requiring robust EMI suppression.

Replacement Considerations

Direct substitutes include other WE-SL1 variants with similar electrical parameters, such as 744212101 (100 µH) or 744212331 (330 µH), provided the inductance difference is acceptable for the specific application design.