Siemens Matsushita Components 549
●E core with flattened, lower center leg
for especially flat transformer design
●For DC/DC converters
●EFD cores are supplied as single units
Magnetic characteristics (per set)
Σ
l/A
= 2,27 mm–1
l
e= 34 mm
A
e= 15 mm2
A
min = 12,2 mm2
V
e= 510 mm3
Approx. weight 2,8 g/set
Ungapped
Gapped
The
A
Lvalue in the table applies to a core set comprising one ungapped core (dimension
g
=0)and
one gapped core (dimension
g
> 0).
Calculation factors (see page 423 for formulas)
Validity range:
K1
,
K2
: 0,10 mm <
s
< 1,00 mm
K3
,
K4
: 30 nH <
A
L < 280 nH
Material
A
L value
nH
µe
A
L1min
nH
P
V
W/set
Ordering code
N49 600 + 30/– 20 % 1080 330 0,11
(50 mT, 500 kHz, 100 ˚C) B66413-G-X149
N87 780 + 30/– 20 % 1400 560 0,28
(200 mT, 100 kHz, 100 ˚C) B66413-G-X187
Material
A
L value
nH
µe
g
approx.
mm
Ordering code
N87 100 ± 10 % 180 0,17 B66413-U100-K187
160 ± 15 % 288 0,08 B66413-U160-L187
Material Relationship between
air gap –
A
L value Calculation of saturation current
K1
(25 ˚C)
K2
(25 ˚C)
K3
(25 ˚C)
K4
(25 ˚C)
K3
(100 ˚C)
K4
(100 ˚C)
N87 29,7 – 0,676 44,2 – 0,796 33,2 – 0,873
EFD 15/8/5
Core B66413
550 Siemens Matsushita Components
Coil former
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 page 156
Squared pins
Yoke
●Material: Stainless spring steel (0,25 mm)
Coil former Yoke
Coil former Ordering code
Sections
A
N
mm2
l
N
mm
A
Rvalue
µΩ Pins
1 15,8 29 63,1 8 B66414-B1008-D1
Yoke (ordering code per piece, 2 are required) B66414-B2000
FEK0357-P
Markierung für Stift 1
1234
5
6
7
16,5±0,2
15±0,2
8
8,15 max.3,5±0,2
0,45
5,55+0,15
1,7
2,55+0,15
8,85 min.
13,75
3,7511,25
85
41
ø1+0,1
Montagelochung
Duroplast
CuSn6, verzinnt
0,16,95
_
0,1510,4
_
0,151,6
_
0,14
_
0,1510,55
_
7,5 0,2
_
Mounting holes
Marking of pin 1
CuSn6, tinned
EFD 15/8/5
Accessories B66414
Siemens Matsushita Components 551
SMD coil former with J terminals
Material: GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:
F max. operating temperature 155 ˚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
permissiblesolderingtemperatureforwire-wrapconnectiononcoilformer:400 ˚C,1s
Winding: see page 160
Yoke
●Material: Stainless spring steel (0,25 mm)
Cover plate
●For marking and improved processing on assembly machines
●See under coil former for material and resistance to soldering heat
Coil former Yoke
Sections
A
N
mm2
l
N
mm
A
Rvalue
µΩ Terminals Ordering code
1 20,4 36 60 8 B66414-B6008-T1
2 19,5 36 64 8 B66414-B6008-T2
Yoke (ordering code per piece, 2 are required) B66414-B2000
Cover plate B66414-A7000
Cover plate
FEK0329-J
0,5±0,05 5,5+0,2
7,6±0,15
2,6+0,15
Empfehlung für das
Leiterplattenlayout
17,7
11,25
3,75
0,55±0,05 0,6±0,05
2,5
11,25
3,75
1,2
5
6
7
81
2
3
4
0,2515
_
0,2
_
10,4
0,5±0,05
0,2
_
3,45
0,3
_
20,8
_
10,6 0,2
7,3 0,1
_
_
16 0,2
0,2
_
6,4
Center flange omitted for one-section version
Recommended
PCB layout
EFD 15/8/5
Accessories B66414
