COMMON MODE CHOKE

노이즈 제거용 CHOKE

COMMON MODE CHOKE CATALOGUE
 
 
     
   
 

AMFN series magnetic cores of high permeability are now available that is made of nanocrystaiine alloys that offers very low hysteresis loss.

   Recently, EMI (electromagnetic inference) considerations are increasingly important as electronic devices become part of our daily lives. This has rapidly increased the required performances for EMC (electromagnetic compatibility ) components such as common mode choke coils, which provide protection against incoming and outgoing high frequency noise. They also protect electronic devices against high voltage pulse noise generated by spark discharge, etc. These types of noise are created whenever there are rapid transitions in voltage and/or current waveforms. In switching power supplies, the waveforms are periodic, but it’s waveforms are non-periodic in case of data line for telecommunication. The application area of common mode chokes covers all products from telecommunication product for signal transmitting to switch-mode power supplies, frequency converters, and UPS units.

   Common mode chokes are mainly used to provide attenuation of asymmetrical conducted interferences. Their design is determined by the specifications of the corresponding international standards and the specific interference suppression problem.

   AMFN series common mode chokes shows a higher insertion attenuation, that is insertion damping, overall the wide-range of frequency. The typical permeability of AMFN series common mode choke is 80,000. To satisfy these requirements, AMOGREENTECH will be provide a higher level of common mode chokes with AMFN series flat loop cores.

 
     
   
 

Standard Core Dimensions & Specifications

 

AMFN Series Nanocrystalline Common Mode Choke

Part No.

Finished Core (mm)1)

Leff 2)

(mm)

Aeff 3)

(mm2)

Veff 4)

(mm3)

Wa

(cm2)

AL 5)

(μH)

OD

ID

HT

AMFN-16A-TH

17.8

8.3

8.1

41

14

588

54

41.4*

AMFN-20A-TH

22.5

10.4

10.1

51

24

1224

85

57.0**

AMFN-24A-TH

27.7

17.3

12.9

71

20

1414

235

22.5*

AMFN-25A-TH

27.7

17.3

12.9

71

20

1414

235

10.6***

AMFN-25S-TH

27.7

13.8

12.4

64

36

2318

150

72.5***

AMFN-32S-TH

32.7

17.8

12.4

79

40

3140

248

66.0***

AMFN-40S-TH

40.7

23.4

15.3

101

58

5789

430

74.0***

AMFN-40A-TH

42.7

29.0

18.0

113

48

5424

804

52.5***

AMFN-50S-TH

52.8

37.2

22.9

141

80

11304

1086

45.3***

AMFN-63A-TH

66.5

46.5

28.6

177

130

23062

1697

64.5***

Notes :

1) The finished core dimensions shows a typical ones. Tolerance is ± 0.2 mm.

2) Nominal values of magnetic path length.

3) Nominal values of cross-section area.

4) Nominal values of volume.

5) Typical value. Tolerance is *) -25 ~+45 %, **)-25 ~+40 %, ***)-/+30 %. Initial nominal inductance at 10 kHz, 0.1 Vosc and room temperature.

 

 

 
     
   
 

High permeability

Reduce in size

Reduce the winding turns

Low DC resistance

Low core loss

Low power consumption

High impedance overall the wide-range of frequency

Getting a suitable insertion loss in wide-range of frequency

Low profile (1 ~ 5 mm height)

 
     
   
 

▪ EMI common mode filtering

▪ Telecommunications and data communications interface transformers

▪ High accuracy current transformers

▪ High accuracy pulse transformers

▪ Ground fault protection devices

 
 

 

 
     
 
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