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Coilforms

In their simplest form, chokes are ferrite rods with a single winding, preferably close to the rod because distant turns hardly couple to the rod and contribute very little to the inductance of a choke. Such chokes may be used as LC filter components or inserted in the lines to and from devices producing (asymmetrical) interference. At low frequencies, the reactance is low and does not affect the flow of desired currents, but at higher frequencies the reactance is high enough to attenuate the interference, generating in or endangering the protected device.

Ferrite ring, pot, RM and other closed cores can provide much higher inductance values required for suppression at lower frequencies, but they are more prone to saturation when high operational currents have to be handled. In some conditions, iron powder toroids, having much higher saturation induction than any ferrite grade, may be useful - refer to MMG Sales for details of Iron Powder core availability.

Choke cores are available in a wide variety of materials refer to MMG Sales for details.

STANDARD
MATERIALS:		   F01, F52, FB2, FA1, F53

CORE P/N   Units   Length
(in)		   O.D.
(in)		   L:D Ratio   A(cm2)   Available
Lead Gauge
AWG
C_ _-4X1B-_ _ _/1
 		   in.
mm		   0.172
4.369		   0.046
1.168		    
3.739		    
0.0918		   24
 
C_ _-5C1N-_ _ _/1
 		   in.
mm		   0.187
4.750		   0.058
1.473		    
3.224		    
0.1157		   24
 
C_ _-5C1R-_ _ _/1
 		   in.
mm		   0.187
4.750		   0.061
1.549		    
3.066		    
0.1217		   24
 
C_ _-5Q1R-_ _ _/1
 		   in.
mm		   0.200
5.080		   0.061
1.549		    
3.279		    
0.1217		   24
 
C_ _-7520-_ _ _/1
 		   in.
mm		   0.250
6.350		   0.070
1.778		    
3.571		    
0.1396		   24, 22
 
C_ _-9725-_ _ _/1
 		   in.
mm		   0.322
8.179		   0.075
1.905		    
4.293		    
0.1496		   24, 22
 
C_ _-9B26-_ _ _/1
 		   in.
mm		   0.326
8.280		   0.076
1.930		    
4.289		    
0.1516		   24, 22
 
C_ _-9E26-_ _ _/1
 		   in.
mm		   0.329
8.357		   0.076
1.930		    
4.329		    
0.1516		   24, 22
 
C_ _-DV3K-_ _ _/1
 		   in.
mm		   0.485
12.319		   0.125
3.175		    
3.880		    
0.2494		   24, 22
 
C_ _-EA4M-_ _ _/1
 		   in.
mm		   0.500
12.700		   0.162
4.115		    
3.086		    
0.3232		   22, 21, 20
 
C_ _-HV3K-_ _ _/1
 		   in.
mm		   0.625
15.875		   0.125
3.175		    
5.000		    
0.2494		   22, 21, 20
 
C_ _-HV5C-_ _ _/1
 		   in.
mm		   0.625
15.875		   0.187
4.750		    
3.342		    
0.3730		   22, 21, 20
 
C_ _-Q075-_ _ _/1
 		   in.
mm		   0.875
22.225		   0.250
6.350		    
3.500		    
0..4967		   22, 21, 20
 
C_ _-HV4G-_ _ _/1
 		   in.
mm		   0.625
15.875		   0.156
3.962		    
4.006		    
0.3112		   22, 21, 20
 
C_ _-X575-_ _ _/1
 		   in.
mm		   1.125
28.575		   0.250
6.350		    
4.500		    
0.4967		   22, 21, 20, 18
 
C_ _-Q070-_ _ _/1
 		   in.
mm		   0.875
22.225		   0.245
6.223		    
3.571		    
0.4888		   22, 21, 20, 18
 
C_ _-TK75-_ _ _/1
 		   in.
mm		   1.000
25.400		   0.250
6.350		    
4.000		    
0.4967		   22, 21, 20, 18
 
C_ _-10Q70-_ _ _/1
 		   in.
mm		   1.250
31.750		   0.245
6.223		    
5.102		    
0.4888		   22, 21, 20, 18
 

_ _ is reserved for material designation.
_ _ _ is reserved for the designation of the lead length and wire gauge.

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MMG-North America
126 Pennsylvania Ave   •   Paterson, NJ 07503   •   United States
Tel: (973) 345-8900   •   Fax: (973) 345-1172
Mail us: sales@mmgna.com