THROUGH-HOLE TYPE
Common-Mode Choke
FEATURES
Low cost
Low resistance
Excellent electrical isolation
and environmental stability
APPLICATIONS
To suppress common mode noise in particular
frequency range
Eliminate the problem of conducted EMI in data
line applications
C
M
K
08
B
02
ELECTRICAL CHARACTERISTICS @25 C
PART NO.
CMK08B02TH
CMK08B03TH
CMK08B04TH
Inductance
(uH)
(1-8)
18~36
24
36
Leakage Inductance
(uH) Max
(1-8, Short Others)
0.3
0.2
0.3
Interwinding Capacitance
(pF) Max
25
15
25
DC Resistance
( ) Max
0.065
0.30
0.35
Turns Ratio
@100KHz
5%
1:1:1:1
1:1:1:1
1:1:1:1
o
MECHANICAL CONSTRUCTION
A
8
7
6
5
SCHEMATICS
8
7
6
5
CMK08B02
B
1
2
3
4
1
2
3
4
DATE CODE
IMPEDANCE CURVE
E
4000
C
CMK08B04TH
TYP
3000
D
(Ohms)
2000
MIN
F
G
1000
H
I
J
0.005
K
0.005
0.005
ATTENUATION (dB)
UNIT : mm / inch
A =11.90 0.254 / 0.315
B = 9.90 0.254 / 0.217
C = 6.40 0.254 / 0.157
D = 3.20 0.254 / 0.327
E = 0.50 0.254 / 0.028
F = 2.54 / 0.005 (TYP)
G = 0.50 0.127 / 0.020
H = 7.62 / 0.300 (TYP)
I = 7.62 / 0.300 (TYP)
J = 1.10 0.127 / 0.043
K = 2.14 0.127 / 0.084
0.010
0.010
0.010
0.010
0.010
10
20
30
50
70
100
200
300
FREQUENCY (MHz)
ATTENUATION
0
-5
-10
-15
-20
-25
CMK08B03TH
1
10
FREQUENCY (MHz)
100
DELTA ELECTRONICS, INC.
(TAOYUAN PLANT CPBG)
252, SHANG YING ROAD, KUEI SAN, TAOYUAN HSIEN 333, TAIWAN, R.O.C.
TEL: 886-3-3591968; FAX: 886-3-3591991
http://www.deltaww.com/products/networking/power.htm
B-18