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Common Mode Chokes / Filters:

4.422 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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150 In stock
Each (Supplied on Cut Tape)
Cut Tape
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1+
€2.890
50+
€2.300
100+
€2.290
Min: 1 / Mult: 1
300mA
47µH
WE-SL1 Series
2836796

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Date/Lot Code

1.214 In stock
Each (Supplied on Cut Tape)
Cut Tape
Packaging Options
5+
€1.010
50+
€0.777
250+
€0.559
500+
€0.548
1000+
€0.537
Min: 5 / Mult: 5
500mA
140nH
0805USBN Series
3264942

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Date/Lot Code

SCHAFFNER - TE CONNECTIVITY
464 In stock
Each
1+
€1.210
10+
€1.000
50+
€0.869
100+
€0.754
200+
€0.739
Min: 1 / Mult: 1
400mA
15mH
RC Series
2364237

RoHS

441 In stock
Each
1+
€1.060
10+
€0.784
100+
€0.572
500+
€0.453
1000+
€0.423
More Pricing...
Min: 1 / Mult: 1
2A
600µH
SC-G Series
1187664

RoHS

181 In stock
Each
1+
€5.590
5+
€5.160
10+
€4.380
20+
€4.110
40+
€3.870
More Pricing...
Min: 1 / Mult: 1
1A
18mH
CMV Series
2949471

RoHS

107 In stock
Each
1+
€3.350
10+
€2.850
60+
€2.380
Min: 1 / Mult: 1
2A
26µH
SN-JB Series
3290858

RoHS

76 In stock
Each
1+
€1.120
10+
€0.885
50+
€0.834
Min: 1 / Mult: 1
2.5A
17.99µH
SU-9HD Series
2836796RL

RoHS

Date/Lot Code

1.214 In stock
Each (Supplied on Cut Tape)
Re-Reel
A €5.00 re-reeling charge will be added for this product
Packaging Options
50+
€0.777
250+
€0.559
500+
€0.548
1000+
€0.537
Min: 100 / Mult: 5
500mA
140nH
0805USBN Series
2860708

RoHS

Date/Lot Code

335 In stock
Each
1+
€1.800
10+
€1.630
60+
€1.510
120+
€1.430
Min: 1 / Mult: 1
1.5A
16.4mH
SSHB21H Series
2949432

RoHS

87 In stock
Each
1+
€1.090
10+
€0.867
50+
€0.783
Min: 1 / Mult: 1
3A
2.5µH
SN Series
2949456

RoHS

81 In stock
Each
1+
€3.580
10+
€2.770
50+
€2.410
Min: 1 / Mult: 1
3A
40µH
SN-J Series
2949393

RoHS

66 In stock
Each
1+
€1.810
10+
€1.560
Min: 1 / Mult: 1
800mA
47.5mH
SSR21NVS-M Series
3290799

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80 In stock
Each
1+
€2.240
10+
€1.620
50+
€1.500
Min: 1 / Mult: 1
700mA
17.9mH
SS21V
3365715

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Date/Lot Code

1.120 In stock
Each (Supplied on Cut Tape)
Cut Tape
10+
€0.859
50+
€0.700
100+
€0.625
500+
€0.502
1000+
€0.492
Min: 10 / Mult: 10
500mA
60µH
SBT Series
2364386

RoHS

665 In stock
Each
10+
€0.520
50+
€0.468
100+
€0.426
500+
€0.301
Min: 10 / Mult: 10
700mA
40µH
SU-9VD Series
2458147

RoHS

48 In stock
Each
1+
€2.520
5+
€2.410
10+
€2.300
20+
€1.970
40+
€1.640
Min: 1 / Mult: 1
1.6A
130µH
BU10 Series
2860726

RoHS

45 In stock
Each
1+
€1.810
10+
€1.640
Min: 1 / Mult: 1
300mA
135mH
SSHB21HS Series
2860735

RoHS

28 In stock
Each
1+
€1.800
10+
€1.630
Min: 1 / Mult: 1
1.8A
9.5mH
SSHB21HS Series
3011692

RoHS

40 In stock
Each
1+
€4.510
30+
€3.240
Min: 1 / Mult: 1
10A
1.5mH
SCR22 Series
2949332

RoHS

64 In stock
Each
1+
€2.300
10+
€1.930
60+
€1.800
Min: 1 / Mult: 1
700mA
40.5mH
SSR21NH Series
2364390

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Date/Lot Code

490 In stock
Each
1+
€0.753
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€0.686
50+
€0.641
100+
€0.596
500+
€0.536
Min: 1 / Mult: 1
700mA
1.5mH
SU-9VF Series
1848218RL

RoHS

Date/Lot Code

150 In stock
Each (Supplied on Cut Tape)
Re-Reel
A €5.00 re-reeling charge will be added for this product
Packaging Options
100+
€2.290
Min: 100 / Mult: 1
300mA
47µH
WE-SL1 Series
2949506

RoHS

Date/Lot Code

184 In stock
Each
1+
€1.410
10+
€1.200
50+
€1.020
100+
€0.886
500+
€0.822
Min: 1 / Mult: 1
4A
12µH
SHO Series
2949480

RoHS

158 In stock
Each
1+
€3.430
10+
€2.740
80+
€2.150
Min: 1 / Mult: 1
2A
46µH
SN-P2 Series
2949437

RoHS

131 In stock
Each
1+
€2.360
10+
€2.130
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€1.600
100+
€1.360
Min: 1 / Mult: 1
5A
4µH
SN Series
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