Document 326-1
Common Mode Line Chokes - CMT Series
Coilcraft’s CMT toroid style common mode chokes are
designed to provide the highest common mode imped-
ance over the widest frequency range. These parts are
ideal for any application requiring a high DC current bias
andarewellsuitedforuseinswitch-modepowersupplies.
equalamplitude.Differentialmodeinductorsareavailable
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 isolation between windings
• Industry standard footprint.
• IEC, UL, and VDE compliant.
Common mode chokes are most effective in filtering
supply and return conductors with in-phase signals of
0.118
3,00
Recommended
Schematic
Board Layout
1
4
1
2
4
3
H max
X
CMT-X-X.X-XL
CCI XXXX
CC–3X
2
3
Weights:
CMT1: 13.3 – 25.5 g;
CMT2: 20.7– 41.7 g;
CMT3: 42.5 – 74.9 g;
CMT4: 115 – 117 g
Y
1
2
2
3
W max
L max
Terminations: Tin-silver over copper
0.120/0.180
3,05/4,57
CMT-1 Series
Leakage
Lead
diameter
nom
PC board
hole
diameter
Part
L min1 Irms inductance2 DCR max
H
max
L
max
W
max
X
Y
number
(mH)
(A)
max (µH)
(Ohms)
±±0±ꢀ1±ꢁ,2 ±±0±ꢀ1±ꢁ,2
CMT1-5.0-1L
CMT1-8.0-1L
CMT1-15.0-1L 15.0
5.0
8.0
1.0
1.0
1.0
80
125
233
0.207
0.270
0.430
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
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
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
CMT1-4.0-2L
CMT1-7.5-2L
2.5
4.0
7.5
2.0
2.0
2.0
42
70
74
0.090
0.095
0.108
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
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
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
CMT1-2.1-4L
CMT1-3.7-4L
1.3
2.1
3.7
4.0
4.0
4.0
20
36
40
0.029
0.040
0.036
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
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
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
CMT1-1.7-6L
CMT1-3.0-6L
1.0
1.7
3.0
6.0
6.0
6.0
19
34
35
0.022
0.032
0.027
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
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
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
CMT1-1.1-9L
CMT1-1.9-9L
0.6
1.1
1.9
9.0
9.0
9.0
11
12
20
0.012
0.013
0.017
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
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
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
CMT1-.8-12L
CMT1-1.4-12L
0.5
0.8
1.4
12.0
12.0
12.0
9
9
16
0.008
0.008
0.011
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
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
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
CMT1-.6-15L
CMT1-1.1-15L
0.3
0.6
1.1
15.0
15.0
15.0
6
6.5
13.7
0.005
0.006
0.008
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
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
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. Operating temperature range –40°C to +85°C.
4. Electrical specifications at 25°C.
Specifications subject to change without notice.
Please check our website for latest information.
Document326-1 Revised08/20/08
© Coilcraft, Inc. 2009
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