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Products » EPCOS AG Ferrites and Cores » PM Ferrite Cores »

PM Ferrite Cores

Epcos AG issues 5 standard sizes of PM ferrite cores intended for a use as magnetic circuits of high-capacity power transformers operating in frequency range of up to 30 kHz.

PM series derived its name from English word set (for POT core MODULE) and is characterized by high compactness and modularity of construction.

Find PM cores in our stock

Geometrical Dimensions

Geometrical dimensions of PM ferrite cores issued by Epcos AG.

Standard Size a [mm] b [mm] c [mm] d1 [mm] d2 [mm]
PM 50/39 50,0-1,7 39,0+1,3 min. 23,4 20,0-0,6 5,4+0,2
PM 62/49 62,0-2,0 48,8+1,5 min. 29,0 25,5-0,8 5,4+0,2
PM 74/59 74,0-2,5 57,5+1,8 min. 34,0 29,5-1,0 5,4+0,2
PM 87/70 87,0-3,0 67,1+2,1 min. 39,4 37,7-1,0 8,5+0,3
PM 114/93 114,0-4,5 88,0+3,7 min. 52,0 43,0-1,4 5,4+0,4


Standard Size f [mm] g [mm] h [mm] H1 [mm] H2 [mm]
PM 50/39 max.23,0 1,2+0,2 5,0-0,4 26,4+0,8 39,0-0,4
PM 62/49 max.28,5 1,2+0,2 4,0+1,0 33,4+0,8 49,0-0,4
PM 74/59 max.32,4 2,5+0,4 4,0+0,4 40,7+0,8 59,0-0,6
PM 87/70 max.36,0 3,5+0,4 5,0-0,4 48,0+0,8 70,0-0,8
PM 114/93 max.45,0 4,0 5,3+0,4 63,0+1,6 93,0-1,0

Frames for PM50/39, PM62/49, PM 74/59, PM87/70 ferrite cores are issued in version with or without pins for mounting on printed circuit board.. Frames for PM114/93 series of larger ferrites are issued in version without pins. Drawings of frames and mounting brackets for PM cores of Epcos AG may be accessed by opening pdf file from table shown above.

Designation in Design Documentation

Measurement unit — set
N87 PM114/93 B65733-A-R87
B65733 — PM114/93 standard size code
87 — core is made from N87 ferrite material

Nomenclature of PM Cores without Gap

Standard Size Material Order code AL [nH/turn²] ∑l/A
[mm-1]
le [mm] Ae [mm²] Ve [mm³]
PM 50/39 N27
N87
B65646-A-R27
B65646-A-R87
7400±25%
7400±25%
0,227 84,00 370,0 31000
PM 62/49 N27
N49
N87
B65684-A-R27
B65684-A-R49
B65684-A-R87
9200±25%

9200±25%
0,191 109,0 570,0 62000
PM 74/59 N27 
N87 
B65686-A-R27
B65686-A-R87
10000±25%
10000±25%

0,162 128,0 790,0 101000
PM 87/70

N27
N87
N92

B65713-A-R27
B65713-A-R87
B65713-A-R92
12000±25%
12000±25%


0,16 146,0 910,0 330000
PM 114/93 N27
N87
B65733-A-R27
B65733-A-R87
16000±25%
16000±25%
0,116 200,0 1720,0 344000

Nomenclature of PM Cores with Gap

Standard Size Material, AL [nH/turn²] Order code Gap [mm]
PM 50/39 N27 PM 50/39 Al=100
N27 PM 50/39 Al=250
N27 PM 50/39 Al=630
N27 PM 50/39 Al=1600
B65646-A100-A27
B65646-A250-A27
B65646-A630-A27
B65646-A1600-J27

2,00
0,63

PM 62/49 N27 PM 62/49 Al=234
N27 PM 62/49 Al=315
N27 PM 62/49 Al=630
N27 PM 62/49 Al=1600
N27 PM 62/49 Al=4000
B65684-A234-A27
B65684-A315-A27
B65684-A630-A27
B65684-A1600-J27
B65684-A4000-L27

2,60
1,10

PM 74/59 N27 PM 74/59 Al=315
N27 PM 74/59 Al=630
N27 PM 74/59 Al=4000
B65686-A315-A27
B65686-A630-A27
B65686-A4000-L27
3,80
1,50

PM 87/70 N27 PM 87/70 Al=270
N27 PM 87/70 Al=400
N27 PM 87/70 Al=1000
N27 PM 87/70 Al=2500
N27 PM 87/70 Al=5000
B65713-A270-A27
B65713-A400-A27
B65713-A1000-A27
B65713-A2500-J27
B65713-A5000-L27

3,50


0,14
PM 114/93 N27 PM 114/93 Al=330
N27 PM 114/93 Al=630
N27 PM 114/93 Al=6300
N27 PM 114/93 Al=8000
B65733-A330-A27
B65733-A630-A27
B65733-A6300-L27
B65733-A8000-L27

3,80
0,22

Example of assembling a set on PM-configured cores

Example of assembling a set on PM-configured cores

Additional Information

To decrease losses on transportation and storage, it is recommended (as possible) to order ferrite cores, bobbin and clamps of PM-configuration in multiples of amounts contained in factory package. Information on number of cores in standard factory package is given in this page.

 
NORTH-WESTERN LABORATORY: NEWS
 
05.06 09 
Epcos has developed a new N95 power ferrite material with an exceptionally low power loss.



12.05 09 
New Epcos ferrite ring core sizes : N87 R20*12*6 and N87 R28*16*9



02.02 09 
New Epcos ferrite E core size : N87 E16/8/7,8 B66502GX187



 
 


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