Technical Data 4312 Effective October 2015
Supersedes March 2007
Product description
• Four sizes of through-hole off-line common
mode inductors
• Inductance range from 0.53 - 66 mH
• Current range up to 6.5 Amps
• Noise attenuation up to 68 dB
• Frequency range up to 6 MHz
• Meets UL94V-0 flammability standard
• Ferrite core material
Applications
• Protects AC input from effects of switching
regulators
• Off-line power supplies
• EMI filters
• DC-DC converters
• Computer, TV, audio and office equipment
Environmental data
• Storage temperature range (component):
-40°C to +125°C
• Operating temperature range: -40°C to +125°C
(ambient + self-temperature rise).
CMT
Common mode inductors, through-hole
Pb
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
2
Technical Data 4312
Effective October 2015
CMT
Common mode inductors, through-hole
www.eaton.com/elx
Product specifications
Part number
OCL (mH)
minimum (1-2)
OCL (mH)
minimum (4-3)
l rms.
Amperes max
DCR (Ω) typ
@ 20°C (1-2)
DCR (Ω) typ
@ 20°C (4-3)
CMT1-1-R 66.0 66.0 0.74 1.20 1.20
CMT1-2-R 49.0 49.0 0.88 0.85 0.85
CMT1-3-R 28.0 28.0 1.13 0.50 0.50
CMT1-4-R 21 21 1.37 0.35 0.35
CMT1-5-R 13 13 1.76 0.20 0.20
CMT1-6-R 7.50 7.50 2.27 0.13 0.13
CMT1-7-R 4.20 4.20 2.89 0.08 0.08
CMT1-8-R 2.40 2.40 3.85 0.045 0.045
CMT1-9-R 1.85 1.85 4.53 0.033 0.033
CMT1-10-R 0.94 0.94 6.05 0.018 0.018
CMT2-1-R 30 30 1.50 0.350 0.350
CMT2-2-R 20 20 1.95 0.220 0.220
CMT2-3-R 12 12 2.45 0.135 0.135
CMT2-4-R 8.0 8.0 2.80 0.100 0.100
CMT2-5-R 6.0 6.0 3.40 0.070 0.070
CMT2-6-R 4.8 4.8 3.95 0.053 0.053
CMT2-7-R 3.2 3.2 4.40 0.042 0.042
CMT2-8-R 2.4 2.4 4.75 0.037 0.037
CMT2-9-R 2.0 2.0 5.45 0.028 0.028
CMT2-10-R 1.6 1.6 5.75 0.026 0.026
CMT3-1-R 5.4 5.4 2.0 0.12 0.12
CMT3-2-R 3.5 3.5 2.6 0.08 0.08
CMT3-3-R 2.7 2.7 3.0 0.055 0.055
CMT3-4-R 1.3 1.3 4.0 0.032 0.032
CMT3-5-R 0.92 0.92 5.0 0.021 0.021
CMT3-6-R 0.53 0.53 6.5 0.013 0.013
CMT4-1-R 5.4 5.4 2.0 0.12 0.12
CMT4-2-R 3.5 3.5 2.6 0.08 0.08
CMT4-3-R 2.7 2.7 3.0 0.055 0.055
CMT4-4-R 1.3 1.3 4.0 0.032 0.032
CMT4-5-R 0.92 0.92 5.0 0.021 0.021
CMT4-6-R 0.53 0.53 6.5 0.013 0.013
Definitions:
OCL = Open Circuit Inductance
DCR = Direct Current Resistance
Irms = rms current for 40°C max temperature rise at worst case ambient temperature
of 85°C.
Electrical Characteristics:
OCL (1-2) 0.10Vrms, 10kHz, 0.0Adc: (See Chart)
OCL (4-3) 0.10Vrms, 10kHz, 0.0Adc: (See Chart)
DCR (1-2) typ @ 20°C: (See Chart)
DCR (4-3) typ @ 20°C: (See Chart)
Hipot rating: winding to winding: 2400 Vac for 1 second. Turns Ratio: (1-2):(4-3) 1:1
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
3
Technical Data 4312
Effective October 2015
CMT
Common mode inductors, through-hole
www.eaton.com/elx
Dimensions–mm
CMT1
1
23
4
23 34
SIDE VIEW
Pin #1 indicator
29.5 max
3.8
typ
10.00
13.00
22.0 max
0.80 dia
36.5 max
1
23
4
component side
1.15 dia ±0.13
13.0 ±0.20
10.0 ±0.20
CMT1-X
wwll yy R
FRONT VIEW BOTTOM VIEW
RECOMMENDED PCB LAYOUT SCHEMATIC
2
1
3
4
CMT2
36.5 max
4.0
±1.0
15.0
±0.2
26.5 max
1.2 dia
3.2
44.5 max
1
23
4
component side
3.00 dia ±0.13
21.0 ±0.
20
15.0
±0.20
CMT2 -
wwllyy R
FRONT VIEW BOTTOM VIEW
RECOMMENDED PCB LAYOUT SCHEMATIC
2
1
3
4
21.0 ±0.2
SIDE VIEW
1
23
4
2334
Pin #1 indicator
CMT3
25.0 max Dia
14 max
5
typ
ØDia
SIDE VIEW
12
43
2
3
1
43
2
component side
15.0 ±0.20
15.0
±0.20
TOP VIEW BOTTOM VIEW RECOMMENDED PCB LAYOUT
Pin #1 Indicator "Y" Dia
ref"Z" Dia ref
CMT3-1 0.58 0.83
CMT3-2 0.64 0.90
CMT3-3 0.71 0.97
CMT3-4 0.80 1.06
CMT3-5 0.89 1.15
CMT3-6 0.99 1.25
zdia
15.0
±0.20
15.0
±0.20
3
4
2
1
ydia
CMT4
CMT4-x
wwllyy - R
SIDE VIEW
1
2
3
4
Pin #1 indicator
"Y" Dia
ref"Z" Dia ref
CMT4-1 0.58 0.83
CMT4-2 0.64 0.90
CMT4-3 0.71 0.97
CMT4-4 0.80 1.06
CMT4-5 0.89 1.15
CMT4-6 0.99 1.25
ydia
zdia
1
23
4
component side
12.0 ±0.20
11.0
±0.20
FRONT VIEW BOTTOM VIEW RECOMMENDED PCB LAYOUT
12.00
11.00
25.5 max
25.0 max
2
1
41
5.0 typ
15
.4 max
(1) All Dimensions are in millimeters unless otherwise
specified
(2) To lerances are +/- 0.20mm unless stated otherwise.
(3) wwllyy = (Date Code) R = (Revision Level)
Schematic is the same for all the series
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
4
Technical Data 4312
Effective October 2015
CMT
Common mode inductors, through-hole
www.eaton.com/elx
Attenuation Curves
AttenuationCMT1
-70
-60
-50
-40
-30
-20
-10
0
0.06 0.10.2 0.6 124
FREQUENCY (MHz)
-6 -7 -8 -9 -10
-1 -2 -3 -4 -5
dB
AttenuationCMT3&CMT4
-50
-45
-40
-35
-30
-25
-20
-15
-10
0.06 0.10.2 0.40.6 0.81 246
FREQUENCY (MHz)
-1 -2
-3
-5
-4
-6
dB
AttenuationCMT2
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
0.08 0.10.150.2 0.30.4 0.50.6 0.70.8
FREQUENCY (MHz)
-6 -7 -8 -9 -10
-1 -2 -3 -4 -5
dB
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
5
Technical Data 4312
Effective October 2015
CMT
Common mode inductors, through-hole
www.eaton.com/elx
Impedance Curves
Impedance CMT1 - 1 thru - 5
0
10
20
30
40
50
60
70
80
90
100
0.05 0.10.2 0.30.4 0.50.6 0.70.8 0.9
FREQUENCY (MHz)
-1 -2
-3
-4 -5
Impedance CMT1 - 6 thru -10
0
2
4
6
8
10
12
14
16
18
20
0.05 0.20.4 0.60.8 11.4
FREQUENCY (MHz)
-6
-7
-9
-8
-10
Impedance CMT2 - 1 thru - 5
0
20
40
60
80
100
120
0.05 0.10.2 0.30.4 0.50.6 0.7
FREQUENCY (MHz)
-1
4- 3-2-
-5
Impedance CMT2 - 6 thru -10
0
5
10
15
20
25
0.05 0.10.2 0.30.4 0.50.6 0.70.8 0.911.21.4 1.6
FREQUENCY (MHz)
-6 -7
-9
-8
-10
Impedance CMT3 & CMT4
0
0.5
1
1.5
2
2.5
3
3.5
0.06 0.10.2 0.40.6 0.81 24
FREQUENCY (MHz)
-4 -5 -6
Impedance CMT3 & CMT4
0
5
10
15
20
25
0.06 0.10.2 0.40.6 0.81 2
FREQUENCY (MHz)
-1
-2
-3
Z(KOhm)
Z(KOhm)
Z(KOhm)
Z(KOhm)
Z (K Ohm)
Z(KOhm)
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
www.eaton.com/elx
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. 4312
October 2015
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
CMT
Common mode inductors, through-hole
Technical Data 4312
Effective October 2015
Life Support Policy: Eaton does not authorize the use of any of its products for use in life support devices or systems without the express written
approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Wave solder profile
Reference EN 61760-1:2006
Profile Feature Standard SnPb Solder Lead (Pb) Free Solder
Preheat • Temperature min. (Tsmin) 100°C 100°C
• Temperature typ. (Tstyp) 120°C 120°C
• Temperature max. (Tsmax) 130°C 130°C
• Time (Tsmin to Tsmax) (ts)70 seconds 70 seconds
D preheat to max Temperature 150°C max. 150°C max.
Peak temperature (TP)* 235°C – 260°C 250°C – 260°C
Time at peak temperature (tp)10 seconds max
5 seconds max each wave
10 seconds max
5 seconds max each wave
Ramp-down rate ~ 2 K/s min
~3.5 K/s typ
~5 K/s max
~ 2 K/s min
~3.5 K/s typ
~5 K/s max
Time 25°C to 25°C 4 minutes 4 minutes
Manual solder
350°C, 4-5 seconds. (by soldering iron), generally manual, hand soldering is not recommended.
Temperature
Time
T
smin
Tsmax
Tstyp
Tp
tp
First Wave Second Wave
Preheat area Cool down area
Discontinued, Effective
March 1, 2016 or until
inventory is depleted.
No recommended
replacement available
