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Product Detailed Parameters
- Description：CMC 370MA 2LN 120OHM SMD AECQ200
- Series：WE-CNSW
- Mfr：Würth Elektronik
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：2
- Current Rating (Max)：370mA
- DC Resistance (DCR) (Max)：300mOhm
- Voltage Rating - DC：50V
- Voltage Rating - AC：-
- Operating Temperature：-40°C ~ 125°C
- Ratings：AEC-Q200
- Approval Agency：-
- Features：-
- Mounting Type：Surface Mount
- Size / Dimension：0.079" L x 0.047" W (2.00mm x 1.20mm)
- Height (Max)：0.055" (1.40mm)
- Package / Case：Horizontal, 4 PC Pad
- Inductance @ Frequency：-
- Impedance @ Frequency：120 Ohms @ 100 MHz
- Qualification：-
- Grade：-
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Overview
The Würth Elektronik 744231121 is a surface-mount common mode choke from the WE-CNSW series, designed for data line noise suppression. It features two lines with an impedance of 120 Ohms at 100 MHz and a maximum DC resistance of 300 milliohms. The component supports a rated current of 370 mA and operates within a temperature range of -40°C to +125°C. Packaged in a compact 0805 (2.00mm x 1.20mm) horizontal footprint with a maximum height of 1.40mm, it meets AEC-Q200 automotive qualification standards.
Feature Summary
- Provides effective common mode noise suppression for high-speed data lines
- Automotive qualified under AEC-Q200 standards for reliability
- Compact horizontal surface mount design suitable for space-constrained PCBs
Applications
- USB interface signal line filtering
- High-speed serial data bus protection
- Automotive electronic control unit input/output circuits
Procurement Notes
Verify the specific order code against the manufacturer's official datasheet to ensure correct impedance and current ratings. Confirm that the package orientation matches the horizontal configuration specified for this part number. Check for RoHS compliance documentation if required by your manufacturing process. Ensure storage conditions align with standard SMD component handling guidelines to maintain solderability and performance integrity.
Selection Notes
Select this component when designing for applications requiring low insertion loss and high common mode rejection in small form factors. The 120 Ohm impedance at 100 MHz makes it suitable for frequencies typical in USB and similar digital interfaces. Consider the 370 mA current rating to ensure it does not saturate under normal operating conditions. The AEC-Q200 certification is critical for automotive projects requiring validated component reliability.
Part Context
This component belongs to the WE-CNSW series of SMD common mode chokes from Würth Elektronik. These components are engineered specifically for suppressing electromagnetic interference on data lines. The series offers various impedance values and current ratings to suit different signal speeds and power requirements while maintaining a consistent small footprint for modern electronics.
Replacement Considerations
Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement maintains the same 120 Ohm @ 100 MHz impedance and 370 mA current rating. Verify that alternative parts also meet AEC-Q200 standards if used in automotive contexts. Package dimensions must match the 0805 horizontal layout to fit existing footprints.
