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

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Murata 51 μH 230 mA Common Mode Choke 1Ω RS Stock No.: 871-2054P Mfr. Part No.: DLW43SH510XK2L Datasheets: HK$7.528 Each (Supplied on a Reel)	Murata	51 μH	DLW43S	-	1 MHz	1Ω	230 mA	4.5 x 3.2 x 2.6mm	-40°C → +125°C	-	-	Surface Mount	-	Solder Pad	1812 (4532M)
KEMET 4.1 mH Common Mode Choke 7.72mΩ RS Stock No.: 242-7674 Mfr. Part No.: SCF25XV-110-1R4A013JV Datasheets: HK$89.95 Each	KEMET	4.1 mH	SCF	-	40 MHz	7.72mΩ	-	-	-	-	-	-	-	-	-
RS PRO 2 x 1 mH 10 A Common Mode Choke 7mΩ 250V RS Stock No.: 173-0105 Datasheets: HK$146.173 Each (In a Box of 180)	RS PRO	2 x 1 mH	-	-	10 kHz	7mΩ	10 A	27.5 x 18.5 x 33mm	-	-	-	Through Hole	250V	Solder	-
RS PRO 47 μH 500 mA Common Mode Choke 180mΩ RS Stock No.: 173-0194 Datasheets: HK$19.939 Each (In a Box of 300)	RS PRO	47 μH	CMJ	-	-	180mΩ	500 mA	7.6 x 5.8 x 4.3mm	0°C → +70°C	2	-	Surface Mount	-	Solder Pad	-
KEMET 2 mH Common Mode Choke 3.71mΩ RS Stock No.: 242-7686 Mfr. Part No.: SCF25XV-170-1R7A009JV Datasheets: HK$89.95 Each	KEMET	2 mH	SCF	-	40 MHz	3.71mΩ	-	-	-	-	-	-	-	-	-
Murata 200 mA Common Mode Choke 3Ω RS Stock No.: 188-8801P Mfr. Part No.: DLW5AHN402SQ2L Datasheets: HK$13.15 Each (Supplied on a Reel)	Murata	-	DLW5AH/5BS	4000 Ω	100 MHz	3Ω	200 mA	5 x 3.6 x 4.3mm	-25 → +85 °C	-	-	Surface Mount	-	Surface Mount	2014
Wurth Elektronik 2 μH 15 A Common Mode Choke RS Stock No.: 296-218 Mfr. Part No.: 744710215 Datasheets: HK$14.77 Each (In a Bag of 5)	Wurth Elektronik	2 μH	WE-SD	-	-	-	15 A	-	-	-	-	-	-	-	-
Wurth Elektronik 10 μH 10 A Common Mode Choke RS Stock No.: 296-187 Mfr. Part No.: 744711010 Datasheets: HK$14.77 Each (In a Bag of 5)	Wurth Elektronik	10 μH	WE-SD	-	-	-	10 A	-	-	-	-	-	-	-	-
Wurth Elektronik 5 mH 3 A Common Mode Choke 40mΩ RS Stock No.: 185-7024 Mfr. Part No.: 7448023005 Datasheets: HK$47.263 Each (In a Tray of 40)	Wurth Elektronik	5 mH	WE-CMBNC	-	10 kHz	40mΩ	3 A	18 x 14 x 22mm	-40°C → +125°C	-	-	Through Hole	-	Solder Pad	-
Wurth Elektronik 2 x 2.2 mH 2 A Common Mode Choke 2 x 0.1Ω RS Stock No.: 904-0366 Mfr. Part No.: 7446622002 Datasheets: HK$36.30 Each	Wurth Elektronik	2 x 2.2 mH	WE-LF	100 mΩ	10 KHz	2 x 0.1Ω	2 A	18 (Dia.) x 13mm	-40°C → +125°C	-	-	Through Hole	-	-	-
TDK 730 nH 220 mA Common mode filter 500mΩ 50V RS Stock No.: 916-4128 Mfr. Part No.: ACM2012-361-2P-T002 Datasheets: HK$2.108 Each (In a Pack of 25)	TDK	730 nH	ACM	360 Ω	100 MHz	500mΩ	220 mA	2 x 1.2 x 1.3mm	-40°C → +85°C	2	-	Surface Mount	50V	Surface Mount	2012
KEMET 1 mH 30 A Common Mode Choke 6mΩ RS Stock No.: 169-6887 Mfr. Part No.: SC-30-100 Datasheets: HK$86.562 Each (In a Box of 60)	KEMET	1 mH	SC	-	100 KHz	6mΩ	30 A	62 x 35 x 62mm	-25°C → +105°C	-	-	Through Hole	-	Solder Pad	-
Wurth Elektronik 10 mH 2 A Common Mode Choke 85mΩ RS Stock No.: 185-7023 Mfr. Part No.: 7448022010 Datasheets: HK$47.263 Each (In a Tray of 40)	Wurth Elektronik	10 mH	WE-CMBNC	-	10 kHz	85mΩ	2 A	18 x 14 x 22mm	-40°C → +125°C	-	-	Through Hole	-	Solder Pad	-
Murata 100 μH 200 mA Common Mode Choke 2Ω RS Stock No.: 871-2073P Mfr. Part No.: DLW43SH101XK2L Datasheets: HK$7.46 Each (Supplied on a Reel)	Murata	100 μH	DLW43S	-	1 MHz	2Ω	200 mA	4.5 x 3.2 x 2.6mm	-40°C → +125°C	-	-	Surface Mount	-	Solder Pad	1812 (4532M)
Wurth Elektronik WE-TEFA Common mode filter 125 (1 Turn) Ω, 588 (2 Turn) Ω RS Stock No.: 185-7107 Mfr. Part No.: 782114155200 Datasheets: HK$17.36 Each (In a Tray of 60)	Wurth Elektronik	-	WE-TEFA	125 (1 Turn) Ω, 588 (2 Turn) Ω	100 MHz	-	-	28 Dia. x 20mm	-55°C → +140°C	-	AEC-Q200	-	-	-	-
Wurth Elektronik 2.5 mH 5 A Common Mode Choke 15mΩ RS Stock No.: 185-7026 Mfr. Part No.: 7448025003 Datasheets: HK$47.263 Each (In a Tray of 40)	Wurth Elektronik	2.5 mH	WE-CMBNC	-	10 kHz	15mΩ	5 A	18 x 14 x 22mm	-40°C → +125°C	-	-	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: HK$133.90 Each	Schurter	7.2 mH	DKIV-1	-	3.62 MHz	2.6mΩ	-	-	-	2	-	-	-	-	-
Schurter 1.8 mH Common Mode Choke 1.7mΩ RS Stock No.: 232-2854 Mfr. Part No.: 3-127-624 Datasheets: HK$5,098.20 1 Box of 40	Schurter	1.8 mH	DKIV-1	-	10.3 MHz	1.7mΩ	-	-	-	2	-	-	-	-	-
TDK 1.5 μH 4 A Common mode filter 15mΩ 80V RS Stock No.: 916-4140 Mfr. Part No.: ACM7060-701-2PL-TL01 Datasheets: HK$12.388 Each (In a Pack of 5)	TDK	1.5 μH	ACM	700 Ω	100 MHz	15mΩ	4 A	7 x 6 x 3.5mm	-40°C → +85°C	2	-	Surface Mount	80V	Surface Mount	7060
Wurth Elektronik 2 x 1.8 mH 6 A Common Mode Choke 2 x 0.02Ω RS Stock No.: 904-0331 Mfr. Part No.: 7446326002 Datasheets: HK$37.80 Each	Wurth Elektronik	2 x 1.8 mH	WE-LF	23 mΩ	10 KHz	2 x 0.02Ω	6 A	26.5 x 18.5 x 30.5mm	-40°C → +125°C	-	-	Through Hole	-	-	-