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Common Mode Chokes / Filters:

4,716 Products Found

Our range of Common Mode Chokes includes both radial leaded and SMD types.

A common mode choke is an electrical filter that blocks high frequency noise common to two or more data or power lines while allowing the desired DC or low-frequency signal to pass. Common mode (CM) noise current is typically radiated from sources such as unwanted radio signals, unshielded electronics, inverters and motors. Left unfiltered, this noise presents interference problems in electronics and electrical circuits.

How do common mode chokes work?

In normal or differential (single choke) mode, current travels on one line in one direction from the source to the load, and in the opposite direction on the return line that completes the circuit. In common mode, the noise current travels on both lines in the same direction.

This means that the combined magnetic flux adds to create an opposing field to block the noise. In differential mode, the current travels in opposite directions and the flux subtracts or cancels out so that the field does not oppose the normal mode signal.

How to choose a Common Mode Choke?

The main criteria for selecting a common mode choke are:
  1. Required impedance: How much attenuation of noise is needed?
  2. Required frequency range: Over what frequency bandwidth is the noise?
  3. Required current handling: How much differential mode current must it handle?

Types of common mode chokes

  1. High-Speed and Super-Speed Data Line EMI Chokes
  2. Data Line Common Mode EMI Chokes
  3. Data/Power Line Common Mode EMI Chokes
  4. Surface Mount Power Line Common Mode EMI Chokes
  5. Through-Hole Power Line Common Mode EMI Chokes

Applications for common mode chokes

Common mode choke coils are suited for noise suppression on lines with large current flows, such as AC/DC power supply lines. The distortion of the waveform is reduced. Common mode choke coils are suited for noise suppression on lines where signal waveform distortion causes a problem, such as video signal lines.

Common mode choke application example

As the auto industry’s boom continues, the adoption of electronic devices in automobiles has grown rapidly. Thanks to this trend, vehicles can now be equipped with a variety of features, such as infotainment systems, ADAS (advanced driver-assistance systems), navigation systems, OBD (on-board diagnostics), and others.

CAN bus (Controlled Area Network) is one of the communication standards that allows all these features to function in unison. It uses two-wire differential signalling to send and receive data from the different devices in the network. While the nodes of the bus can be near other EMI sources in the vehicle, the design of a robust CAN bus that can withstand all incoming noise is integral to delivering a reliable and safe vehicle. In addition to other filtering techniques, common mode chokes are one of the devices that are used to combat noise in a CAN bus.

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Common Mode Chokes / Filters

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1848218

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
Kč96.558
50+
Kč86.275
100+
Kč83.015
250+
Kč82.012
500+
Kč74.989
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Min: 1 / Mult: 1
300mA
47µH
WE-SL1 Series
2836796

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Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
5+
Kč28.842
50+
Kč22.923
250+
Kč16.503
500+
Kč13.292
1000+
Kč12.515
Min: 5 / Mult: 5
500mA
140nH
0805USBN Series
3264942

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SCHAFFNER - TE CONNECTIVITY
Each
1+
Kč30.347
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Kč25.080
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Kč21.795
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Kč18.910
200+
Kč18.534
Min: 1 / Mult: 1
400mA
15mH
RC Series
2364237

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Kč26.083
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Kč17.406
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Kč14.095
500+
Kč11.161
1000+
Kč10.433
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2A
600µH
SC-G Series
1187664

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Kč127.156
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Kč118.127
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Kč107.844
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Kč101.323
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Kč95.555
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1A
18mH
CMV Series
2949471

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Kč84.018
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Kč69.221
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Kč61.697
Min: 1 / Mult: 1
2A
26µH
SN-JB Series
3290858

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Each
1+
Kč28.090
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Kč22.196
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Kč20.917
Min: 1 / Mult: 1
2.5A
17.99µH
SU-9HD Series
2836796RL

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Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
50+
Kč22.923
250+
Kč16.503
500+
Kč13.292
1000+
Kč12.515
Min: 100 / Mult: 5
500mA
140nH
0805USBN Series
2860708

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Date/Lot Code

Each
1+
Kč53.170
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Kč48.154
60+
Kč44.642
120+
Kč38.874
Min: 1 / Mult: 1
1.5A
16.4mH
SSHB21H Series
2949393

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Kč45.395
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Kč37.620
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800mA
47.5mH
SSR21NVS-M Series
2949456

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Each
1+
Kč89.786
10+
Kč69.472
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Kč60.443
Min: 1 / Mult: 1
3A
40µH
SN-J Series
2949432

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Each
1+
Kč28.591
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Kč22.171
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Kč20.240
Min: 1 / Mult: 1
3A
2.5µH
SN Series
3290799

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Kč64.706
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Kč50.662
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Kč43.639
Min: 1 / Mult: 1
700mA
17.9mH
SS21V
3365715

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Each (Supplied on Cut Tape)
Cut Tape
10+
Kč18.986
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Kč15.424
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Kč14.346
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Kč13.267
1000+
Kč12.390
Min: 10 / Mult: 10
500mA
60µH
SBT Series
2364386

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1+
Kč23.826
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Kč21.519
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Kč20.064
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Kč18.710
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Kč16.553
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Min: 1 / Mult: 1
700mA
40µH
SU-9VD Series
2458147

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1+
Kč120.635
5+
Kč94.050
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Kč74.237
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Kč58.186
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Kč49.408
Min: 1 / Mult: 1
1.6A
130µH
BU10 Series
2860735

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Each
1+
Kč45.144
10+
Kč40.880
Min: 1 / Mult: 1
1.8A
9.5mH
SSHB21HS Series
2860726

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Each
1+
Kč45.395
10+
Kč41.131
Min: 1 / Mult: 1
300mA
135mH
SSHB21HS Series
3011692

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Each
1+
Kč113.111
30+
Kč81.259
Min: 1 / Mult: 1
10A
1.5mH
SCR22 Series
2949332

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Each
1+
Kč57.684
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Kč48.404
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Kč45.144
Min: 1 / Mult: 1
700mA
40.5mH
SSR21NH Series
2364390

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Date/Lot Code

Each
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Kč18.885
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Kč17.205
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Kč16.026
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Kč14.948
Min: 1 / Mult: 1
700mA
1.5mH
SU-9VF Series
1848218RL

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Date/Lot Code

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
Kč83.015
250+
Kč82.012
500+
Kč74.989
1000+
Kč69.221
Min: 100 / Mult: 1
300mA
47µH
WE-SL1 Series
2949437

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Each
1+
Kč58.186
10+
Kč47.652
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Kč39.376
100+
Kč36.115
Min: 1 / Mult: 1
5A
4µH
SN Series
2949506

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Kč35.363
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Kč29.093
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Kč25.582
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Kč22.196
Min: 1 / Mult: 1
4A
12µH
SHO Series
2949480

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Each
1+
Kč84.520
10+
Kč68.218
80+
Kč57.182
Min: 1 / Mult: 1
2A
46µH
SN-P2 Series
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