US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Common Mode Line Chokes
–
CMT
Document 326-1
Document 326-1 Revised 05/21/12
CMT-1 Series
Leakage Lead PC board
Part L min1 Irms inductance2 DCR max3 H L W X Y diameter hole
number (mH) (A) max (µH) (Ohms) max max max ±0.01/0,25 ±0.01/0,25 nom diameter
CMT1-5.0-1L 5.0 1.0 80 0.207 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-8.0-1L 8.0 1.0 125 0.270 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-15.0-1L 15.0 1.0 233 0.430 1.155/29,4 1.300/33,0 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-2.5-2L 2.5 2.0 42 0.090 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-4.0-2L 4.0 2.0 70 0.095 1.050/26,7 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-7.5-2L 7.5 2.0 74 0.108 1.155/29,4 1.300/33,0 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-1.3-4L 1.3 4.0 20 0.029 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-2.1-4L 2.1 4.0 36 0.040 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-3.7-4L 3.7 4.0 40 0.036 1.125/28.6 1.300/33,0 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-1.0-6L 1.0 6.0 19 0.022 1.100/27,9 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-1.7-6L 1.7 6.0 34 0.032 1.155/29,4 1.300/33,0 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-3.0-6L 3.0 6.0 35 0.027 1.200/30,5 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-.6-9L 0.6 9.0 11 0.012 1.200/30,5 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.042/1,07 0.071/1,80
CMT1-1.1-9L 1.1 9.0 12 0.013 1.300/33.0 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.042/1,07 0.071/1,80
CMT1-1.9-9L 1.9 9.0 20 0.017 1.300/33.0 1.400/35,6 0.625/15,9 0.80/20,3 0.40/10,2 0.042/1,07 0.071/1,80
CMT1-.5-12L 0.5 12.0 9 0.008 1.200/30,5 1.210/30,7 0.650/16,5 0.80/20,3 0.40/10,2 0.048/1,22 0.081/2,06
CMT1-.8-12L 0.8 12.0 9 0.008 1.200/30,5 1.210/30,7 0.650/16,5 0.80/20,3 0.40/10,2 0.048/1,22 0.081/2,06
CMT1-1.4-12L 1.4 12.0 16 0.011 1.300/33.0 1.210/30,7 0.650/16,5 0.80/20,3 0.40/10,2 0.048/1,22 0.081/2,06
CMT1-.3-15L 0.3 15.0 6 0.005 1.300/33.0 1.210/30,7 0.625/15,9 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-.6-15L 0.6 15.0 6.5 0.006 1.250/31.8 1.210/30,7 0.650/16,5 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
CMT1-1.1-15L 1.1 15.0 13.7 0.008 1.250/31.8 1.210/30,7 0.700/17,8 0.80/20,3 0.40/10,2 0.054/1,37 0.091/2,32
1. Inductance is per winding, tested at 15.75 kHz, 0 Adc.
2. Leakage inductance is measured from pin 1 to pin 4 with pins 2 and 3 shorted.
3. DCR is per winding.
4. Operating temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
Coilcraft’s CMT toroid style common mode chokes are
designed to provide the highest common mode impedance
over the widest frequency range. These parts are ideal for
any application requiring a high DC current bias and are
well suited for use in switch-mode power supplies.
Common mode chokes are most effective in filtering sup-
ply and return conductors with in-phase signals of equal
amplitude. Differential mode inductors are available for
filtering out-of-phase or uneven amplitude signals.
CMTs feature inductance values up to 125 mH and Irms
ratings as high as 15 Amps.
• 1250 Vrms, one minute isolation between windings
• Industry standard footprint.
• Creepage and clearance = 3.2 mm
• UL1446 Class B (130°C) Insulation System
(UL File E83628)
W max
23
Schematic
1
23
41
Recommended
PC Board Lay
out
23
X
Y
4
1
L max
2
0.120/0.180
3,05/4,57
0.118
3,00
H max
Parts manufactured
prior to
September 2011
may be
marked differently.
Part
number
Internal
codes
CMTX-X.X-XL
CC-3 Y
XXXX
Weights: CMT1: 13.3 – 25.5 g;
CMT2: 20.7– 41.7 g;
CMT3: 42.5 – 77.2 g;
CMT4: 115 – 117 g
Terminations: Tin-silver over copper
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Common Mode Line Chokes – CMT Series
Document 326-2 Revised 05/21/12
Document 326-2
CMT-2 Series
Leakage Lead PC board
Part L min1 Irms inductance2 DCR max3 H L W X Y diameter hole
number (mH) (A) max (µH) (Ohms) max max max ±0.01/0,25 ±0.01/0,25 nom diameter
CMT2-7.5-1L 7.5 1.0 90 0.270 1.100/27,9 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-13-1L 13.0 1.0 190 0.415 1.300/33,0 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-3.8-2L 3.8 2.0 48 0.106 1.100/27,9 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-6.5-2L 6.5 2.0 98 0.145 1.300/33,0 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-1.9-4L 1.9 4.0 26 0.038 1.100/27,9 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-3.3-4L 3.3 4.0 45 0.055 1.300/33,0 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-1.5-6L 1.5 6.0 21 0.029 1.100/27,9 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-2.6-6L 2.6 6.0 41 0.040 1.400/35,6 1.400/35,6 0.900/22,9 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-.9-9L 0.9 9.0 17 0.014 1.200/30,5 1.310/33,3 0.825/21,0 0.90/22,9 0.60/15,2 0.042/1,07 0.071/1,80
CMT2-1.5-9L 1.5 9.0 15 0.013 1.250/31,8 1.250/31,8 0.825/21,0 0.90/22,9 0.60/15,2 0.042/1,07 0.071/1,80
CMT2-.7-12L 0.7 12.0 14 0.011 1.200/30,5 1.250/31,8 0.825/21,0 0.90/22,9 0.60/15,2 0.048/1,22 0.081/2,06
CMT2-1.2-12L 1.2 12.0 14 0.011 1.200/30,5 1.250/31,8 0.825/21,0 0.90/22,9 0.60/15,2 0.048/1,22 0.081/2,06
CMT2-.5-15L 0.5 15.0 8.7 0.007 1.300/33.0 1.300/33,0 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
CMT2-.8-15L 0.8 15.0 10 0.007 1.200/30,5 1.250/31,8 0.825/21,0 0.90/22,9 0.60/15,2 0.054/1,37 0.091/2,32
1. Inductance is per winding, tested at 15.75 kHz, 0 Adc.
2. Leakage inductance is measured from pin 1 to pin 4 with pins 2 and 3 shorted.
3. DCR is per winding.
4. Operating temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
CMT-3 Series
Leakage Lead PC board
Part L min1 Irms inductance2 DCR max3 H L W X Y diameter hole
number (mH) (A) max (µH) (Ohms) max max max ±0.01/0,25 ±0.01/0,25 nom diameter
CMT3-32-1L 32.0 1.0 485 0.650 1.400/35,6 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-56-1L 56.0 1.0 780 0.900 1.650/41,9 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-16-2L 16.0 2.0 210 0.240 1.400/35,6 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-28-2L 28.0 2.0 410 0.330 1.650/41,9 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-8-4L 8.0 4.0 57.5 0.061 1.350/34,3 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-14-4L 14.0 4.0 180 0.120 1.700/43,2 1.650/41,9 0.950/24,1 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-6.6-6L 6.6 6.0 49 0.048 1.400/35,6 1.600/40,6 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-11.5-6L 11.5 6.0 140 0.088 1.700/43,2 1.650/41,9 0.925/23,5 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-4-9L 4.0 9.0 37 0.026 1.400/35,6 1.450/36,8 0.925/23,5 1.20/30,5 0.70/17,8 0.042/1,07 0.071/1,80
CMT3-7-9L 7.0 9.0 104 0.045 1.760/44,7 1.760/44,7 0.975/24,8 1.20/30,5 0.70/17,8 0.042/1,07 0.071/1,80
CMT3-3-12L 3.0 12.0 40 0.022 1.700/43,2 1.700/43,2 0.950/24,1 1.20/30,5 0.70/17,8 0.048/1,22 0.081/2,06
CMT3-5.2-12L 5.2 12.0 47 0.025 1.700/43,2 1.700/43,2 1.000/25,4 1.20/30,5 0.70/17,8 0.048/1,22 0.081/2,06
CMT3-2.5-15L 2.5 15.0 42 0.019 1.750/44,5 1.750/44,5 1.000/25,4 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
CMT3-4.4-15L 4.4 15.0 48 0.017 1.700/43,2 1.700/43,2 1.000/25,4 1.20/30,5 0.70/17,8 0.054/1,37 0.091/2,32
1. Inductance is per winding, tested at 15.75 kHz, 0 Adc.
2. Leakage inductance is measured from pin 1 to pin 4 with pins 2 and 3 shorted.
3. DCR is per winding.
4. Operating temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
W max
23
Schematic
1
23
41
Recommended
PC Board Lay
out
23
X
Y
4
1
L max
2
0.120/0.180
3,05/4,57
0.118
3,00
H max
Parts manufactured
prior to
September 2011
may be
marked differently.
Part
number
Internal
codes
CMTX-X.X-XL
CC-3 Y
XXXX
Weights: CMT1: 13.3 – 25.5 g;
CMT2: 20.7– 41.7 g;
CMT3: 42.5 – 77.2 g;
CMT4: 115 – 117 g
Terminations: Tin-silver over copper
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Common Mode Line Chokes – CMT Series
Document 326-3 Revised 05/21/12
Document 326-3
CMT-4 Series
Leakage Lead PC board
Part L min1 Irms inductance2 DCR max3 H L W X Y diameter hole
number (mH) (A) max (µH) (Ohms) max max max ±0.01/0,25 ±0.01/0,25 nom diameter
CMT4-72-1L 72.0 1.0 1400 1.150 2.100/53,3 2.100/53,3 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-125-1L 125.0 1.0 1400 1.150 2.200/55,9 2.150/54,6 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-36-2L 36.0 2.0 680 0.415 2.215/56,3 2.150/54,6 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-62-2L 62.0 2.0 750 0.415 2.200/55,9 2.150/54,6 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-19-4L 19.0 4.0 350 0.150 2.200/55,9 2.180/55,4 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-32-4L 32.0 4.0 370 0.158 2.200/55,9 2.180/55,4 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-15-6L 15.0 6.0 275 0.114 2.200/55,9 2.180/55,4 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-26-6L 26.0 6.0 320 0.115 2.225/56,5 2.180/55,4 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-10-9L 10.0 9.0 190 0.057 2.200/55,9 2.180/55,4 1.130/28,7 1.50/38,1 0.90/22,9 0.042/1,07 0.071/1,80
CMT4-17-9L 17.0 9.0 220 0.062 2.280/57,9 2.250/57,2 1.150/29,2 1.50/38,1 0.90/22,9 0.042/1,07 0.071/1,80
CMT4-7.5-12L 7.5 12.0 140 0.042 2.200/55,9 2.250/57,2 1.130/28,7 1.50/38,1 0.90/22,9 0.048/1,22 0.081/2,06
CMT4-13-12L 13.0 12.0 155 0.043 2.250/57,2 2.300/58,4 1.130/28,7 1.50/38,1 0.90/22,9 0.048/1,22 0.081/2,06
CMT4-6-15L 6.0 15.0 111 0.030 2.250/57,2 2.250/57,2 1.150/29,2 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
CMT4-10-15L 10.0 15.0 122 0.029 2.280/57,9 2.300/58,4 1.130/28,7 1.50/38,1 0.90/22,9 0.054/1,37 0.091/2,32
1. Inductance is per winding, tested at 15.75 kHz, 0 Adc.
2. Leakage inductance is measured from pin 1 to pin 4 with pins 2 and 3 shorted.
3. DCR is per winding.
4. Operating temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
W max
23
Schematic
1
23
41
Recommended
PC Board Lay
out
23
X
Y
4
1
L max
2
0.120/0.180
3,05/4,57
0.118
3,00
H max
Parts manufactured
prior to
September 2011
may be
marked differently.
Part
number
Internal
codes
CMTX-X.X-XL
CC-3 Y
XXXX
Weights: CMT1: 13.3 – 25.5 g;
CMT2: 20.7– 41.7 g;
CMT3: 42.5 – 77.2 g;
CMT4: 115 – 117 g
Terminations: Tin-silver over copper
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Common Mode Line Chokes – CMT Series
Document 326-4 Revised 05/21/12
Document 326-4
Typical Common Mode Attenuation (Ref: 50 Ohms)
CMT1 and CMT2
CMT3 and CMT4
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Common Mode Line Chokes – CMT Series
Document 326-5 Revised 05/21/12
Document 326-5
Typical Impedance
CMT1 and CMT2
CMT3 and CMT4
