OverviewAll product unitsProduct unitPassive ComponentsProduct groupEMC ComponentsProduct familyCommon Mode Chokes for Extra-low Voltage and Data LinesProduct seriesWE-CNSW SMT Common Mode Line Filter

WE-CNSW SMT Common Mode Line Filter

WE-CNSW SMT Common Mode Line Filter
Size Dimen­sionsL
(mm)
W
(mm)
H
(mm)
Mount
0603 1.6 0.85 1.1 SMT
0805 2 1.2 1.2 SMT
1206 3.2 1.6 1.8 SMT
1812 4.5 3.2 2.8 SMT

Characteristics

  • Current compensated data line filter
  • High common mode noise suppression at high frequencies
  • Small influence on high speed signals through winding symmetry
  • Climatic category 40/105/21 (Size 0603)
  • Climatic category 40/125/21 (Size 0805/1206/1812)

Reference Designs

  • RD22 GB PoE+-Ethernet-USB“ adapter for industrial use with an EMC perspective

Applications

  • USB 2.0
  • IEEE 1394 (Firewire)
  • LVDS
  • High Speed Data Lines
  • LAN
  • Size 1812: recommended for CAN bus and CAN FD

One Pair is all you need.

The WE-LAN AQ is a LAN transformer manufactured by a fully automated production process.

Video and more

Products

All
0603
0805
1206
1812
Order Code Data­sheet Simu­lation Downloads StatusWinding StyleL
(µH)
Z @ 10 MHz
(Ω)
Z @ 100 MHz
(Ω)
IR
(mA)
RDC max.
(Ω)
VR
(V)
VT
(V (AC))
ApplicationDesign KitFilter BagFilter Stick Samples
744230220SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.027 22 800 0.08 50 125 High Speed Data Lines744230
744230450SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.056 45 650 0.11 50 125 High Speed Data Lines744230
744230900SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.134 90 550 0.145 50 125 USB 2.0744230
744230121SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.146 120 450 0.175 50 125 IEEE 1394 / Firewire 400 Mbps744230
744230181SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.22 180 400 0.21 50 125 IEEE 1394 / Firewire 400 Mbps744230
744230251SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.279 250 350 0.28 50 125 High Speed Data Lines744230
744231061SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.088 67 400 0.25 50 125 High Speed Data Lines744230
744231091SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.131 90 370 0.3 50 125 USB 2.0744230
82931061
82931101
82931060
82931100
744231121SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.166 120 370 0.3 50 125 IEEE1394/Firewire 400 Mbps744230
744231181SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.252 180 330 0.35 50 125 IEEE1394/Firewire 400 Mbps744230
744231261SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.367 260 300 0.4 50 125 High Speed Data Lines744230
744231371SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.478 370 280 0.45 50 125 IEEE1394/Firewire 400 Mbps744230
744232090SPEC
9 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.111 90 370 0.3 50 125 USB 2.0744230
829993BAG
829999BAG
829999STICK
744232161SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.196 160 340 0.4 50 125 IEEE1394/Firewire 400 Mbps744230
744232261SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.304 260 310 0.5 50 125744230
744232601SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.3621 600 260 0.8 50 125744230
744232102SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 1.263 1000 230 1 50 125744230
744232222SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 2.578 2200 200 1.2 50 125744230
744235900SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 0.3 90 2000 0.05 60 125744230
744235601SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 1 600 1200 0.1 60 125744230
744235801SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 1.3 800 1000 0.12 60 125744230
744235110SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 11 5000 450 0.8 60 125744230
744235220SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 22 8000 250 2.65 60 125744230
744235510SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 51 3000 200 1 60 125 CAN
744235101SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 100 5000 150 2 60 125
744232101SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 105.3 6000 90 5.5 50 125
744235251SPEC
8 files Active i| Production is active. Expected lifetime: >10 years. bifiliar 250 10000 200 1.6 60 125
Order Code Data­sheet Simu­lation
744230220SPEC
744230450SPEC
744230900SPEC
744230121SPEC
744230181SPEC
744230251SPEC
744231061SPEC
744231091SPEC
744231121SPEC
744231181SPEC
744231261SPEC
744231371SPEC
744232090SPEC
744232161SPEC
744232261SPEC
744232601SPEC
744232102SPEC
744232222SPEC
744235900SPEC
744235601SPEC
744235801SPEC
744235110SPEC
744235220SPEC
744235510SPEC
744235101SPEC
744232101SPEC
744235251SPEC
Samples
Order Code Data­sheet Simu­lation Downloads StatusWinding StyleL
(µH)
Z @ 10 MHz
(Ω)
Z @ 100 MHz
(Ω)
IR
(mA)
RDC max.
(Ω)
VR
(V)
VT
(V (AC))
ApplicationDesign KitFilter BagFilter Stick Samples

Compliance with AEC-Q200

Highest reliability in terms of

  • EMC compatibility
  • Solderability
  • Humidity
  • Temperature influences

HF version for high data rates

While the WE-CNSW series can work up to USB 2.0 interfaces, the WE-CNSW HF was designed to have wider frequency band to be able to work with the newest high-speed interfaces.

Fully automated production

Thanks to the fully automated process, a high degree of winding symmetry and constantly high quality can be achieved. The winding symmetry ensures low parasitic effects and therefore high signal integrity.

Common and Differential Mode Behavior

When the common mode component of a signal tries to pass through the choke, it encounters a high impedance. This is caused by the magnetization of the core and the resulting mutual inductance in the coil.

In contrast to the common mode behavior, the differential mode signal will see almost no impedance, which can be explained by the magnetic field compensation in the core. If the core is not magnetized, there is no mutual inductance so that the useful signal can pass through.

Speed up your design-in process!

The following tools and libraries make component search and selection easier for you

REDEXPERT

The online platform for easy component selection, simulation and design-in with high-precision component and circuit models.

  • Common Mode Attenuation and Impedance
  • Differential Mode Attenuation and Impedance
  • Temperature Derating

Component Libraries

  • EDA models: Altium, Cadstar, Cadence and Eagle
  • CAD files: IGS and STP

Electric models

  • S-Parameter, measured with 4 ports and high accuracy equipment
  • Pspice
  • LTspice

More Tools and Support

Design-in Support

With the Würth Elektronik Application Guide, you can find useful information about interfaces like USB, Ethernet, LVDS and a few more.

Or use one of the various ways to get in touch with us. Feel free to contact us with your questions. Our technical specialists will be happy to help and advise you.

Temperature Derating

How to interpret the temperature derating curve?

Check the data sheets for operating temperature. All derating curves for our CMC can be found in REDEXPERT.

TR = Rated Temperature
Tmax = Upper limit of the operating temperature and max. temperature allowed
ΔT = Tmax – TR

Example of use:
The maximum abient temperature with maximum current capability is 85 °C over this temperature the current capabilities sink. For a higher ambient temperature the maximum current can be read easily from the derating curve with the help of the chart marker.

Bifilar vs. Sectional Winding

Bifilar winding shows the lowest attenuation in differential mode. These chokes are recommended for data lines, where a high isolation is not needed and some high speed signals are involved.

Sectional winding shows the highest attenuation in differential mode. This chokes are recommended for power lines, where a high isolation is mandatory, and the power delivery is happening at low frequency.

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Videos

#askLorandt explains: Influence of a Common Mode Choke to the noise on the data line