CF SERIES
Cylindrical EMI Suppression Ferrites
Suppressors
API's Cylindrical EMI Suppression ferrites provide a cost effective means of
reducing common and differential mode EMI. Used to suppress common
mode EMI on the internal and external cable assemblies of electronic
equipment.
Select a ferrite with an inner diameter most closely matching the outer
diameter of the wires to be filtered.
Features
• Wide range of sizes with inner diameters from 1.5 mm (0.059 inches) to 23
mm (0.905 inches)
• Precision formed smooth surfaces prevent damage to wire insulation
• Available in API-1 and API-2 material.
• Custom designs available
Applications
• Internal and external computer data and power cables.
**Note – Impedance Testing Impedance is typical, measurement using
HP4191A. For CF1-4*1.5*10 through CF2-4.6*1.85*6, based on 1⁄2 turn
(4.0") 32 AWG wire. For CF1-7.35*5.1*10 and above, based on 1⁄2 turn
(4.0") 19 AWG wire.
PART
NUMBER
CF1-4*1.5*10
CF2-4*1.5*10
CF1-4*2*10
CF2-4*2*10
CF1-4.6*1.85*6
CF2-4.6*1.85*6
CF1-7.35*5.1*10
CF2-7.35*5.1*10
CF1-9.5*4.8*20
CF2-9.5*4.8*20
CF1-10.5*5.5*20
CF2-10.5*5.5*20
CF1-12*7.3*15
CF2-12*7.3*15
CF1-14.2*6.35*28.5
CF2-14.2*6.35*28.5
CF1-16*9*17
CF2-16*9*17
CF1-17.5*9.5*28.5
CF2-17.5*9.5*28.5
CF1-21*13.2*21
CF2-21*13.2*21
CF1-26*13*28.5
CF2-26*13*28.5
CF1-28*15.6*7.5
CF2-28*15.6*7.5
CF1-31*19*10
CF2-31*19*10
CF1-36*23*15
CF2-36*23*15
IMPEDANCE**
@ 25
MHz
(Min.)
50
55
40
40
35
35
23
23
70
80
65
70
40
40
115
125
50
55
95
95
55
55
100
110
28
28
30
30
40
40
@ 100
MHz
(Typ.)
135
116
102
86
89
77
68
63
171
142
161
134
107
89
280
230
130
109
217
172
136
115
235
198
85
76
91
83
113
101
MHz
(Typ.)
300
269
282
255
261
237
217
214
263
251
273
261
273
242
302
210
281
257
310
296
309
305
325
316
313
286
232
320
384
369
DIMENSION A
INCHES mm
0.157±.007
0.157±.007
0.157±.007
0.157±.007
0.181±.007
0.181±.007
0.289±.011
0.289±.011
0.374±.011
0.374±.011
0.413±.015
0.413±.015
0.472±.019
0.472±.019
0.559±.019
0.559±.019
0.629±.019
0.629±.019
0.688±.023
0.688±.023
0.826±.023
0.826±.023
1.023±.027
1.023±.027
1.102±.031
1.102±.031
1.220±.031
1.220±.031
1.417±.031
1.417±.031
4.0±0.2
4.0±0.2
4.0±0.2
4.0±0.2
4.6±0.2
4.6±0.2
7.35±0.3
7.35±0.3
9.5±0.3
9.5±0.3
10.5±0.4
10.5±0.4
12.0±0.5
12.0±0.5
14.2±0.5
14.2±0.5
16.0±0.5
16.0±0.5
17.5±0.6
17.5±0.6
21.0±0.6
21.0±0.6
26.0±0.7
26.0±0.7
28.0±0.8
28.0±0.8
31.0±0.8
31.0±0.8
36.0±0.8
36.0±0.8
DIMENSION B
INCHES mm
0.059±.005
0.059±.005
0.078±.007
0.078±.007
0.072±.007
0.072±.007
0.200±.007
0.200±.007
0.188±.007
0.188±.007
0.216±.007
0.216±.007
0.287±.011
0.287±.011
0.250±.011
0.250±.011
0.354±.011
0.354±.011
0.374±.011
0.374±.011
0.519±.019
0.519±.019
0.511±.019
0.511±.019
0.614±.019
0.614±.019
0.748±.023
0.748±.023
0.905±.023
0.905±.023
1.5±0.15
1.5±0.15
2.0±0.2
2.0±0.2
1.85±0.2
1.85±0.2
5.1±0.2
5.1±0.2
4.8±0.2
4.8±0.2
5.5±0.2
5.5±0.2
7.3±0.3
7.3±0.3
6.35±0.3
6.35±0.3
9.0±0.3
9.0±0.3
9.5±0.3
9.5±0.3
13.2±0.5
13.2±0.5
13.0±0.5
13.0±0.5
15.6±0.5
15.6±0.5
19.0±0.6
19.0±0.6
23.0±0.6
23.0±0.6
DIMENSION C
INCHES mm@ 300
0.393±.015
0.393±.015
0.393±.015
0.393±.015
0.236±.011
0.236±.011
0.393±.015
0.393±.015
0.787±.023
0.787±.023
0.787±.023
0.787±.023
0.590±.019
0.590±.019
1.122±.031
1.122±.031
0.669±.023
0.669±.023
1.122±.031
1.122±.031
0.826±.023
0.826±.023
1.122±.031
1.122±.031
0.295±.011
0.295±.011
0.393±.015
0.393±.015
0.590±.019
0.590±.019
10.0±0.4
10.0±0.4
10.0±0.4
10.0±0.4
6.0±0.3
6.0±0.3
10.0±0.4
10.0±0.4
20.0±0.6
20.0±0.6
20.0±0.6
20.0±0.6
15.0±0.5
15.0±0.5
28.5±0.8
28.5±0.8
17.0±0.6
17.0±0.6
28.5±0.8
28.5±0.8
21.0±0.6
21.0±0.6
28.5±0.8
28.5±0.8
7.50±0.3
7.50±0.3
10.0±0.4
10.0±0.4
15.0±0.5
15.0±0.5
270 Quaker Rd., East Aurora NY 14052 • Phone 716-652-3600 • Fax 716-652-4814 • E-mail: apisales@delevan.com • www.delevan.com
1/2009
CF SERIES
Cylindrical EMI Suppression Ferrites
Suppressors
For more detailed graphs, contact factory
270 Quaker Rd., East Aurora NY 14052 • Phone 716-652-3600 • Fax 716-652-4814 • E-mail: apisales@delevan.com • www.delevan.com
1/2009
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