Common Mode Chokes

Common mode (CM) chokes are a type of electrical filter that reduces unwanted interference, by blocking high frequency noise but lets the desired signal to pass. Common mode noise current is usually found in sources such as unwanted radio signals, unshielded electronics, inverters and motors. If this noise is not filtered, then it can cause problems in your electronics and electrical circuits.

RS have a great range of inductors including these common mode chokes with various inductance values and offer high attenuation over a wide frequency range.

Why use common mode chokes?

Common mode chokes can be used to help the prevention of electromagnetic interference and radio frequency interface. By using these chokes you can help stop your electronic devices from malfunctioning.

Things to consider before purchasing a common mode choke:

Impedance
Frequency bandwidth
Current handling

Typical Applications include:

Common mode chokes are often used in electrical, industrial and telecommunication applications to help reduce or remove noise and electromagnetic interference. They can be found in:

Data storage systems
Digital video camera
Industrial systems
Professional audio

1419 Products showing for Common Mode Chokes

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KEMET 3.2 mH Common Mode Choke 6.43mΩ RS Stock No.: 242-7738 Mfr. Part No.: SCF29XV-120-1R6A017JV Datasheets: $21.03 Each	KEMET	3.2 mH	SCF	-	40 MHz	6.43mΩ	-	-	-	-	-	-	-	-	-
KEMET 220 μH Common Mode Choke 0.65mΩ RS Stock No.: 242-7710 Mfr. Part No.: SCF25XV-350-2R4A003JV Datasheets: $22.45 Each	KEMET	220 μH	SCF	-	40 MHz	0.65mΩ	-	-	-	-	-	-	-	-	-
Schurter 230000 μH Common Mode Choke 1.7mΩ RS Stock No.: 232-2837 Mfr. Part No.: 3-127-600 Datasheets: $777.14 1 Box of 40	Schurter	230000 μH	DKIV-1	-	1.04 MHz	1.7mΩ	-	-	-	2	-	-	-	-	-
Wurth Elektronik 2 x 1.6 mH 16.4 A Common Mode Choke 2 x 8.5mΩ RS Stock No.: 126-0974 Mfr. Part No.: 744831016164 Datasheets: $27.19 Each	Wurth Elektronik	2 x 1.6 mH	WE-CMBHV	-	10 KHz	2 x 8.5mΩ	16.4 A	46.5 x 28 x 44.5mm	-40°C → +125°C	-	-	Through Hole	-	Solder Pad	-
Schurter 1.8 mH Common Mode Choke 1.7mΩ RS Stock No.: 232-2854 Mfr. Part No.: 3-127-624 Datasheets: $1,087.99 1 Box of 40	Schurter	1.8 mH	DKIV-1	-	10.3 MHz	1.7mΩ	-	-	-	2	-	-	-	-	-
KEMET 400 μH Common Mode Choke RS Stock No.: 242-7768 Mfr. Part No.: SCF29XV-270-2R3A006JV Datasheets: $17.613 Each (In a Tray of 30)	KEMET	400 μH	SCF	-	40 MHz	-	-	-	-	-	-	-	-	-	-
KEMET 400 μH Common Mode Choke RS Stock No.: 242-7765 Mfr. Part No.: SCF29XV-270-2R3A006JH Datasheets: $17.609 Each (In a Tray of 20)	KEMET	400 μH	SCF	-	40 MHz	-	-	-	-	-	-	-	-	-	-
KEMET 127 μH 6 A Common Mode Choke 31.7mΩ RS Stock No.: 183-6944 Mfr. Part No.: HHBC13-1R2A0127V Datasheets: $9.02 Each	KEMET	127 μH	HHBC	-	100 kHz	31.7mΩ	6 A	30 (Dia.) x 16.2mm	-40°C → +125°C	2	-	Through Hole	-	Solder Pad	-
Schurter 4 mH 12 A Common Mode Choke 4.33mΩ 760V RS Stock No.: 188-9612 Mfr. Part No.: 3-108-434 Datasheets: $58.41 Each	Schurter	4 mH	DKIH-4	-	4.8 MHz	4.33mΩ	12 A	58 (Dia.) x 31mm	-40°C → +100°C	-	-	Flange Mount	760V	Through Hole	-
KEMET 10 μH 20 A Common Mode Choke 8mΩ RS Stock No.: 863-3780 Mfr. Part No.: SC-20-D010 Datasheets: $9.214 Each (In a Bag of 5)	KEMET	10 μH	SC-D	-	100 KHz	8mΩ	20 A	34 x 23 x 34mm	-25°C → +120°C	-	-	Through Hole	-	Solder Pad	-
Schurter 7.2 mH Common Mode Choke 7mΩ RS Stock No.: 232-2849 Mfr. Part No.: 3-127-621 Datasheets: $27.87 Each	Schurter	7.2 mH	DKIV-1	-	1.26 MHz	7mΩ	-	-	-	2	-	-	-	-	-
Schurter 750 μH 32 A Common Mode Choke 0.55mΩ 760V RS Stock No.: 188-9525 Mfr. Part No.: 3-108-438 Datasheets: $52.549 Each (In a Box of 20)	Schurter	750 μH	DKIH-4	-	15.4 MHz	0.55mΩ	32 A	58 (Dia.) x 31mm	-40°C → +100°C	-	-	Flange Mount	760V	Through Hole	-
EPCOS 1.5 mH Common Mode Choke RS Stock No.: 246-9859 Mfr. Part No.: B82727E6403A040 Datasheets: $41.50 Each	EPCOS	1.5 mH	B82727E	0.017 Ω	50 Hz	-	-	-	-	-	-	-	-	-	-
Schurter 750 μH 40 A Common Mode Choke 0.44mΩ 760V RS Stock No.: 188-9526 Mfr. Part No.: 3-108-439 Datasheets: $61.438 Each (In a Box of 20)	Schurter	750 μH	DKIH-4	-	15.4 MHz	0.44mΩ	40 A	58 (Dia.) x 31mm	-40°C → +100°C	-	-	Flange Mount	760V	Through Hole	-
KEMET 3 mH 10 A Common Mode Choke 30mΩ RS Stock No.: 863-3778P Mfr. Part No.: SC-10-30J Datasheets: $11.344 Each (Supplied in a Box)	KEMET	3 mH	SC-J	-	100 KHz	30mΩ	10 A	34 x 24 x 33mm	-25°C → +120°C	-	-	Through Hole	-	Solder Pad	-
Wurth Elektronik 10 mH Common Mode Choke RS Stock No.: 245-8544 Mfr. Part No.: 744825410 Datasheets: $7.946 Each (In a Tray of 20)	Wurth Elektronik	10 mH	WE-CMB	-	10 kHz	-	-	-	-	-	-	-	-	-	-
KEMET 39 μH 30 A Common Mode Choke 6.8mΩ RS Stock No.: 183-6631 Mfr. Part No.: SHBC24N-2R1B0039V Datasheets: $29.061 Each (In a Tray of 12)	KEMET	39 μH	SHBC	-	100 kHz	6.8mΩ	30 A	50.1 (Dia.) x 25.7mm	-40°C → +125°C	2	-	Through Hole	-	Solder Pad	-
Schurter 7.2 mH Common Mode Choke 2.6mΩ RS Stock No.: 232-2857 Mfr. Part No.: 3-127-625 Datasheets: $29.64 Each	Schurter	7.2 mH	DKIV-1	-	3.62 MHz	2.6mΩ	-	-	-	2	-	-	-	-	-
Wurth Elektronik 47 mH Common Mode Choke RS Stock No.: 245-8565 Mfr. Part No.: 744869161473 Datasheets: $5.04 Each	Wurth Elektronik	47 mH	WE-FCLP	-	10 kHz	-	-	-	-	-	-	-	-	-	-
KEMET 500 μH 15 A Common Mode Choke 8mΩ RS Stock No.: 169-6881 Mfr. Part No.: SC-15-05J Datasheets: $7.717 Each (In a Box of 200)	KEMET	500 μH	SC-J	-	100 KHz	8mΩ	15 A	34 x 23 x 33mm	-25°C → +120°C	-	-	Through Hole	-	Solder Pad	-