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Common Mode Chokes / Filters:

4,432 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

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
1+
kr 45.540
50+
kr 40.690
100+
kr 39.150
250+
kr 38.680
500+
kr 35.370
More Pricing...
Min: 1 / Mult: 1
300mA
47µH
WE-SL1 Series
2836796

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
5+
kr 13.600
50+
kr 10.810
250+
kr 7.780
500+
kr 6.270
1000+
kr 5.900
Min: 5 / Mult: 5
500mA
140nH
0805USBN Series
3264942

RoHS

Date/Lot Code

SCHAFFNER - TE CONNECTIVITY
Each
1+
kr 13.910
10+
kr 11.500
50+
kr 9.990
100+
kr 8.670
200+
kr 8.500
Min: 1 / Mult: 1
400mA
15mH
RC Series
2364237

RoHS

Each
1+
kr 12.300
10+
kr 8.210
100+
kr 6.650
500+
kr 5.260
1000+
kr 4.920
More Pricing...
Min: 1 / Mult: 1
2A
600µH
SC-G Series
1187664

RoHS

Each
1+
kr 59.970
5+
kr 55.710
10+
kr 50.860
20+
kr 47.790
40+
kr 45.070
More Pricing...
Min: 1 / Mult: 1
1A
18mH
CMV Series
2949471

RoHS

Each
1+
kr 39.630
10+
kr 32.650
60+
kr 29.100
Min: 1 / Mult: 1
2A
26µH
SN-JB Series
3290858

RoHS

Each
1+
kr 12.880
10+
kr 10.170
50+
kr 9.590
Min: 1 / Mult: 1
2.5A
17.99µH
SU-9HD Series
2836796RL

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
50+
kr 10.810
250+
kr 7.780
500+
kr 6.270
1000+
kr 5.900
Min: 100 / Mult: 5
500mA
140nH
0805USBN Series
2860708

RoHS

Date/Lot Code

Each
1+
kr 25.080
10+
kr 22.710
60+
kr 21.060
120+
kr 18.340
Min: 1 / Mult: 1
1.5A
16.4mH
SSHB21H Series
2949432

RoHS

Each
1+
kr 13.490
10+
kr 10.460
50+
kr 9.550
Min: 1 / Mult: 1
3A
2.5µH
SN Series
2949456

RoHS

Each
1+
kr 41.150
10+
kr 31.840
50+
kr 27.700
Min: 1 / Mult: 1
3A
40µH
SN-J Series
2949393

RoHS

Each
1+
kr 20.810
10+
kr 17.930
Min: 1 / Mult: 1
800mA
47.5mH
SSR21NVS-M Series
3290799

RoHS

Each
1+
kr 30.520
10+
kr 23.890
50+
kr 20.580
Min: 1 / Mult: 1
700mA
17.9mH
SS21V
3365715

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Cut Tape
10+
kr 8.950
50+
kr 7.270
100+
kr 6.770
500+
kr 6.260
1000+
kr 5.840
Min: 10 / Mult: 10
500mA
60µH
SBT Series
2364386

RoHS

Each
1+
kr 11.240
10+
kr 10.150
50+
kr 9.460
100+
kr 8.820
500+
kr 7.810
More Pricing...
Min: 1 / Mult: 1
700mA
40µH
SU-9VD Series
2458147

RoHS

Each
1+
kr 56.900
5+
kr 44.360
10+
kr 35.010
20+
kr 27.440
40+
kr 23.300
Min: 1 / Mult: 1
1.6A
130µH
BU10 Series
2860726

RoHS

Each
1+
kr 20.810
10+
kr 18.850
Min: 1 / Mult: 1
300mA
135mH
SSHB21HS Series
2860735

RoHS

Each
1+
kr 21.340
10+
kr 19.320
Min: 1 / Mult: 1
1.8A
9.5mH
SSHB21HS Series
3011692

RoHS

Each
1+
kr 51.850
30+
kr 37.250
Min: 1 / Mult: 1
10A
1.5mH
SCR22 Series
2949332

RoHS

Each
1+
kr 26.440
10+
kr 22.190
60+
kr 20.690
Min: 1 / Mult: 1
700mA
40.5mH
SSR21NH Series
2364390

RoHS

Date/Lot Code

Each
1+
kr 8.910
10+
kr 8.110
50+
kr 7.560
100+
kr 7.050
Min: 1 / Mult: 1
700mA
1.5mH
SU-9VF Series
1848218RL

RoHS

Date/Lot Code

Each (Supplied on Cut Tape)
Re-Reel
Packaging Options
100+
kr 39.150
250+
kr 38.680
500+
kr 35.370
1000+
kr 32.650
Min: 100 / Mult: 1
300mA
47µH
WE-SL1 Series
2949506

RoHS

Date/Lot Code

Each
1+
kr 16.680
10+
kr 13.720
50+
kr 12.070
100+
kr 10.470
Min: 1 / Mult: 1
4A
12µH
SHO Series
2949480

RoHS

Each
1+
kr 39.860
10+
kr 32.180
80+
kr 26.970
Min: 1 / Mult: 1
2A
46µH
SN-P2 Series
2949437

RoHS

Each
1+
kr 27.440
10+
kr 22.480
50+
kr 18.570
100+
kr 17.030
Min: 1 / Mult: 1
5A
4µH
SN Series
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