Common Mode Chokes
For three-phase AC power lines
●Three-phase FM coils
FM series three-phase common mode chokes with FT-1KM
cores (p. 31) are compact in size and have excellent
electromagnetic noise suppression properties.
Table 7. Standard Specifications
Item
Rated voltage
Specification
AC250V
Insulation voltage rating
Insulation resistance
Insulation grade
AC1kV for 1min. or AC2.4kV for 3 sec.
Over 100MΩ after applying DC500V for 1 min.
Class E (120 ºC)
Temperature rise
60 ºC *
Operating temperature range
-40 ºC – +120 ºC (including temperature rise)
• The above specifications are in accordance with Electrical Appliance and Material Control Law, UL, CSA and IEC standards.
• No Ozone Layer Depleting Chemicals are used in these products or in their manufacturing process.
* Note 1: The temperature rise in Table 1 is a projected value based on temperature increase by the heat from DC resistance of the coil when the rated current (DC
or 50/60Hz) in Table 2 is conducted.
* Note 2: The temperature rise is affected by the mounting condition on the circuit board and the amount of harmonic distortion on the load current. Please make
sure that the temperatures of the coil and the terminals are not exceeded the operating temperature range.
Table 8. Product code, part number and specifications
DC
Resistance
(mΩ)
L (mH)
100kHz Diameter
Rated
current
(A)
3
Wire
Finished dimensions (mm)
Weight
(g)
Product
code
P/N
10kHz
MIN.
32.6
12.0
3.3
A
MAX.
34
34
36
61
61
61
63
66
89
89
89
74
78
74
B
MAX.
25
25
28
37
37
38
37
39
42
43
40
49
49
49
F
REF.
12
12
12
35
35
35
35
40
45
45
45
27
27
27
G
REF.
30
30
30
50
50
50
50
60
75
75
75
37
37
37
MIN.
8.3
3.0
0.8
4.6
3.2
1.7
1.1
2.4
4.7
3.0
2.3
2.5
1.4
0.6
(mm)
0.7
0.9
1.3
1.4
1.8
2.1
2.3
2.3
2.0
2.3
2.6
2.5
2.7
2.8
TYP.
42
MAX.
F1AH0268
F1AH0269
F1AH0270
F1AH0271
F1AH0272
F1AH0273
F1AH0274
F1AH0276
F1AH0279
F1AH0280
F1AH0281
F1AH0282
F1AH0283
F1AH0284
FM03R832MB
FM05R302MB
FM10R801MB
FM10J462MB
FM15J322MB
FM20J172MB
FM25J112MB
FM20N242MB
FM20O472MB
FM25O302MB
FM30O232MB
FM30K252MB*
FM40K142MB*
FM50K601MB*
98
32
9
5
47
10
47
10
16.6
11.5
6.2
155
175
174
174
241
335
345
390
375
345
310
20
10
6
15
20
25
4.1
4
20
8.6
6
20
16.8
10.7
8.2
12
8
25
30
6
30
8.8
6
40
5.0
4
50
2.2
3
• UL94V-0 certified resin is used for the case and the base plate
• Custom made coils are also available.
* Temperature rise is 80 ºC (projected value)
18