Document 326-1
Common Mode Line Chokes – CMT
Coilcraft’s CMT toroid style common mode chokes are
designedtoprovidethehighestcommonmodeimpedance
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)
0.118
3,00
Recommended
Schematic
PC Board Layout
1
4
Part
1
4
3
number
H max
Internal
codes
X
CMTX-X.X-XL
XXXX
CC-3 Y
2
Parts manufactured
prior to
Weights:
CMT1: 13.3 – 25.5 g;
CMT2: 20.7– 41.7 g;
CMT3: 42.5 – 77.2 g;
CMT4: 115 – 117 g
2
3
September 2011
Y
1
2
may be
marked differently.
2
3
L max
0.120/0.180
3,05/4,57
W max
Terminations: Tin-silver over copper
CMT-1 Series
Leakage
Lead
diameter
nom
PC board
hole
diameter
Part
L min1 Irms inductance2 DCR max3
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. DCR is per winding.
4. Operating temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
Document 326-1 Revised 05/21/12
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 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 approval.
Specification subject to change without notice.
Please check web site for latest information.
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