FERROXCUBE
DATA SHEET
RM7/I
RM, RM/I, RM/ILP cores and
accessories
Supersedes data of September 2004
2008 Sep 01
Ferroxcube
RM, RM/I, RM/ILP cores and accessories
CORE SETS
Effective core parameters
handbook, halfpage
RM7/I
SYMBOL
Σ(I/A)
V
e
I
e
A
e
A
min
m
PARAMETER
core factor (C1)
effective volume
effective length
effective area
minimum area
mass of set
VALUE
0.680
1325
30.0
44.1
39.6
≈
7.5
UNIT
mm
−1
mm
3
mm
mm
2
mm
2
g
O 7.25
0
0.3
9.3
0
20.3 0.8
3.3
0
17.2 0.7
11.3
0.25
0.5 13.4
8.4 0
0.1
0.6
O 14.75 0
Dimensions in mm.
MGC065
Fig.1 RM7/I core set.
Core sets for general purpose transformers and power applications
Clamping force for A
L
measurements 40
±20
N.
GRADE
3C90
A
L
(nH)
100
±3%
160
±3%
250
±3%
3000
±25%
3F3
100
±3%
160
±3%
250
±3%
2500
±25%
µ
e
≈
54
≈
87
≈
135
≈
1620
≈
54
≈
87
≈
135
≈
1350
AIR GAP
(µm)
≈
730
≈
410
≈
240
≈
0
≈
730
≈
410
≈
240
≈
0
TYPE NUMBER
RM7/I-3C90-A100
RM7/I-3C90-A160
RM7/I-3C90-A250
RM7/I-3C90
RM7/I-3F3-A100
RM7/I-3F3-A160
RM7/I-3F3-A250
RM7/I-3F3
Properties of core sets under power conditions
B (mT) at
GRADE
H = 250 A/m;
f = 25 kHz;
T = 100
°C
≥320
≥315
f = 25 kHz;
ˆ
= 200 mT;
B
T = 100
°C
≤
0.16
−
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
≤
0.17
≤
0.15
f = 400 kHz;
ˆ
B = 50 mT;
T = 100
°C
−
≤
0.25
3C90
3F3
2008 Sep 01
1233
Ferroxcube
RM, RM/I, RM/ILP cores and accessories
COIL FORMER
General data
PARAMETER
Coil former material
Pin material
Maximum operating temperature
Resistance to soldering heat
Solderability
SPECIFICATION
phenolformaldehyde (PF), glass-reinforced, flame retardant
in accordance with UL 94V-0; UL file number E167521(M)
copper-tin alloy (CuSn), tin (Sn) plated
180
°C,
“IEC 60085”,
class H
“IEC 60 068-2-20”,
Part 2, Test Tb, method 1B, 350
°C,
3.5 s
“IEC 60 068-2-20”,
Part 2, Test Ta, method 1
RM7/I
handbook, full pagewidth
0
8.3 0.15
15.24
10.16
5.08
2
3
4
1 min
0.45
(6.85 min)
0
1 0.1
0.75
O 0.8
2.54
1.8
1
5
0
0
O 14.65 0.2 O 8.3 0.1
9.4
8
7
6
0.4
0.9
5.5
0.15
1.3 0
MGC066
Dimensions in mm.
Fig.2 RM7/I coil former.
Winding data and area product for RM7/I coil former
NUMBER
OF
SECTIONS
1
1
2
1
2
NUMBER
OF
PINS
4
8
8
5
5
PIN
POSITIONS
USED
1, 2, 5, 6
all
all
1, 2, 4, 5, 8
1, 2, 4, 5, 8
AVERAGE
LENGTH
OF TURN
(mm)
35
35
35
35
35
WINDING
AREA
(mm
2
)
21
21
2
×
9.8
21
2
×
9.8
WINDING
WIDTH
(mm)
6.85
6.85
2
×
3.2
6.85
2
×
3.2
AREA
PRODUCT
Ae x Aw
(mm
4
)
926
926
2 x 432
926
2 x 432
TYPE NUMBER
CSV-RM7-1S-4P
CSV-RM7-1S-8P
CSV-RM7-2S-8P
CSV-RM7-1S-5P
CSV-RM7-2S-5P
2008 Sep 01
1234
Ferroxcube
RM, RM/I, RM/ILP cores and accessories
MOUNTING PARTS
General data
ITEM
Clamping force
Clip material
Clip plating
Solderability
Type number
≈20
N
steel
tin (Sn)
“IEC 60 068-2-20”,
Part 2, Test Ta, method 1
CLI/P-RM7
12.9
R35
RM7/I
SPECIFICATION
2.5
handbook, halfpage
10.5
0.55
MGC067
5.2
Dimensions in mm.
Fig.3 Mounting clip for RM7/I.
2008 Sep 01
1235
Ferroxcube
RM, RM/I, RM/ILP cores and accessories
COIL FORMER
General data
PARAMETER
Coil former material
Pin material
Maximum operating temperature
Resistance to soldering heat
Solderability
SPECIFICATION
phenolformaldehyde (PF), glass-reinforced, flame retardant
in accordance with UL 94V-0; UL file number E41429 (M)
copper-tin alloy (CuSn), tin (Sn) plated
155
°C,
“IEC 60085”,
class F
“IEC 60 068-2-20”,
Part 2, Test Tb, method 1B, 350
°C,
3.5 s
“IEC 60 068-2-20”,
Part 2, Test Ta, method 1
RM7/I
15.7 max
8.25 0
−
0.15
0.9
2
6.6 min
0.5
12.5
5
2
2.8
15.8
∅
8.3 0
−
0.15
18.4 max
14.8
2
7.4
+
0.15
0
14.65 0
−
0.25
5
3.75
MFP106
0.3
10.9 max
Dimensions in mm.
Fig.4 RM7/I coil former, 8-pins.
Winding data and area product for RM7/I coil former
NUMBER
OF
SECTIONS
1
NUMBER
OF
PINS
8
PIN
POSITIONS
USED
all
AVERAGE
LENGTH
OF TURN
(mm)
35
WINDING
AREA
(mm
2
)
20
WINDING
WIDTH
(mm)
6.6
AREA
PRODUCT
Ae x Aw
(mm
4
)
882
TYPE NUMBER
CSVS-RM7-1S-8P-Z
2008 Sep 01
1236
