RM 8
Core
I
In accordance with IEC 60431
I
Cores without center hole
B65811
for transformer applications
I
RM cores are supplied in sets
Magnetic characteristics
(per set)
with
center hole
without
center hole
0,59
38
64
55
2 430
mm
–1
mm
mm
2
mm
2
mm
3
Σ
l/A
l
e
A
e
A
min
V
e
0,67
35,1
52
—
1 840
Approx. weight
(per set)
m
10,7
12
g
Gapped
Material
A
L
value
s
approx.
mm
3%
3%
3%
5%
0,23
0,17
0,14
0,10
0,49
0,24
0,11
0,04
0,30
0,18
133
168
213
336
76
117
298
752
118
189
µ
e
nH
N48
250
±
315
±
400
±
630
±
Ordering code
1)
-D with center hole
-F with threaded sleeve
-J without center hole
B65811-+250-A48
B65811-+315-A48
B65811-+400-A48
B65811-+630-J48
B65811-J160-A41
B65811-J250-J41
B65811-J630-J41
B65811-J1600-K41
B65811-J250-A87
B65811-J400-A87
N41
160
±
3 %
250
±
5 %
630
±
5 %
1600
±
10 %
250
±
3 %
400
±
3 %
N87
1) Replace the + by the code letter “F” or “D” for the required version. Standard version is “D”.
224
08/01
RM 8
Core
Ungapped
Material
A
L
value
nH
N26
N30
T38
N49
N87
N97
1)
N41
2900 + 30/– 20 % 1550
5700 + 30/– 20 % 2680
12500 + 40/– 30 % 5870
2200 + 30/– 20 % 1040 1270
3300 + 30/– 20 % 1560 1900
3300 + 30/– 20 % 1560 1900
4100 + 30/– 20 % 1930 1900
< 0,37
(50 mT, 500 kHz, 100
°
C)
B65811
µ
e
A
L1min
P
V
nH
W/set
Ordering code
-D with center hole
-J w/o center hole
B65811-D-R26
B65811-J-R30
B65811-J-Y38
B65811-J-R49
< 1,20
B65811-J-R87
(200 mT, 100 kHz, 100
°
C)
B65811-J-R97
< 1,00
(200 mT, 100 kHz, 100
°
C)
< 0,36
(200 mT, 25 kHz, 100
°
C)
B65811-J-R41
1) Preliminary data
225
08/01
RM 8
Accessories
Coil former, squared pins
Material:
GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:
H max. operating temperature 180
°
C), color code black
Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235
°
C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350
°
C, 3,5 s
Winding:
see
“Processing Notes”,
page 153
For matching clamp and insulating washers see page 230
Sections
1
A
N
mm
2
30
l
N
mm
42
A
R
value
µΩ
47
Pins
5
8
8
12
5
8
Ordering code
B65812-N1005-D1
B65812-N1008-D1
B65812-W1008-D1
B65812-N1012-D1
B65812-N1005-D2
B65812-N1008-D2
B65812
2
28,4
42
50
1,3
12 pins
,2
+0
8,7
5±
0,0
5
11 12
10
9
3
4
Version
5 pins
8 pins
Pins omitted
3, 4, 6, 7, 9, 10, 12
3, 4, 9, 10
1
2
8
7
10,65
_
0,15
0,60±0,05
6 5
ø16,9
_
0,2
ø9,95
_
0,15
0,56±0,05
11,55
0,97±0,05
0,5
Ground
Erdungspunkte
Ø 1,3 + 0,1
ø1,3+0,1
5,5±0,3
2,54
ø1+0,1
_
10
FRM0301-M
Hole arrangement
View in mounting direction
226
08/01
60
RM 8
Accessories
Coil former, pins squared in the start-of-winding area
Material:
GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:
H max. operating temperature 180
°
C), color code blue
Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235
°
C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350
°
C, 3,5 s
Winding:
see
“Processing Notes”,
page 153
For matching clamp and insulating washers see page 230
Sections
1
A
N
mm
2
30
l
N
mm
42
A
R
value
µΩ
47
Pins
5
8
12
5
12
Ordering code
B65812-K1005-D1
B65812-K1008-D1
B65812-K1012-D1
B65812-K1005-D2
B65812-K1012-D2
B65812
2
28,4
42
50
5 and 8 pins*)
0,
2
11 12
10
9
8
7
4
6 5
ø16,9
_
0,2
ø9,95
_
0,1
3
12 pins
1,
35
±0
5
,0
8,
7+
1
2
*) Pins 6, 7 and 12 are omitted
*)
in the 5-pin version
10,65
_
0,15
0,60±0,05
0,97±0,05
0,5
Ground
ø1,3+0,1
ø1+0,1
2,54
0,56±0,05
5,5±0,3
11,55
_
10
FRM0240-2
˚
Hole arrangement
View in mounting direction
227
08/01
60
˚
RM 8
Accessories
Coil former for SMPS transformers with line isolation
The creepage distances and clearances are designed such that the coil former is suitable for use
in SMPS transformers with line isolation.
G
Closed center flange with external wire guide
G
Pins squared in the start-of-winding area
G
Optimized for use with automatic winding machines
Material:
GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:
F max. operating temperature 155
°
C), color code green
Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235
°
C, 2 s
Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350
°
C, 3,5 s
Winding:
see
“Processing Notes”,
page 153
Sections
2
A
N
mm
2
28,4
l
N
mm
42
A
R
value
µΩ
50
Pins
8
Ordering code
B65812-X1108-D2
B65812
1,3
8,7
+
0,2
11 12
5±
0,0
1
2
Section C–D
Schnitt C-D
5
View A
Ansicht A
7,4
8
7
6 5
A
5
9,9
0,55±0,5
11,5
_
0,15
10,6
_
0,15
0,55±0,05
ø16,9
_
0,2
ø9,95
_
0,1
C
D
0,9±0,05
ø0,62 max.
Ground Ø
ø1,3+0,1
Erdungspunkte
1,3+0,1
0,45 max.
5,5±0,3
ø1+0,1
Hole arrangement
View in mounting direction
2,54
FRM0260-G
228
08/01
_
1
60
0
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