Fair-Rite Product's Catalog
Part Data Sheet, 8978101021
Printed: 2013-07-03
Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288
Phone: (888) 324-7748 www.fair-rite.com
Part Number:
8978101021
Frequency Range: Dimensions
Description:
Application:
Where Used:
Part Type:
Generic Name:
78 EFD CORE
Inductive Components
Closed Magnetic Circuit
EFD Cores
EFD10
Mechanical Specifications
Weight:
.900
(g) per Set
Part Type Information
EFD10, EFD12, EFD15, EFD20, EFD25, EFD30
EFD (Economical Flat Design) cores have been designed to maximize volume in a low profile geometry. EFD cores allow
maximum throughput power density with reasonably low mass for board level installation.
-EFD cores can be supplied with the centerpost gapped to a mechanical dimension or an AL value.
-AL value is measured at 1 kHz, B < 10 gauss.
-Weight indicated is per pair or set.
Fair-Rite Product's Catalog
Part Data Sheet, 8978101021
Printed: 2013-07-03
Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288
Phone: (888) 324-7748 www.fair-rite.com
Mechanical Specifications
Dim
mm
mm
tol
A
B
C
D
E
F
G
H
J
K
10.50
5.20
2.70
3.75
7.65
4.55
-
-
-
1.45
± 0.3
± 0.15
± 0.2
± 0.15
± 0.3
± 0.2
-
-
-
± 0.1
nominal inch
inch
0.413
0.205
0.106
0.148
0.301
0.179
-
-
-
0.057
misc.
-
-
-
-
-
-
-
-
-
-
Land Patterns
V
W
ref
-
-
-
-
-
-
-
-
-
-
X
Y
Z
Winding Information
Turns
Tested
-
-
Wire
Size
-
1st Wire
Length
-
2nd Wire
Length
Reel Information
Tape Width Pitch
mm
-
mm
-
Parts 7 ''
Reel
-
Parts 13 '' Parts 14 ''
Reel
-
Reel
-
Electrical Specifications
Typical Impedance ( )
Package Size
Pkg Size
-
(-)
Electrical Properties
A
L
(nH)
Ae(cm
2
)
l/A(cm )
l
e
(cm)
V
e
(cm )
A
min
(cm
2
)
3
-1
530 ±25%
0.07200
32.70
2.36
0.17100
.066
Connector Plate
# Holes
-
# Rows
-
Legend
+ Test frequency
Preferred parts, the suggested choice for new designs,have shorter lead times and are more readily available.
The column H(Oe) gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in
the application is this value of H times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material,
see figures 18-23 in the application note How to choose Ferrite Components for EMI Suppression.
A ½ turn is defined as a single pass through a hole.
l/A - Core Constant
Ae : Effective Cross-Sectional Area
L
AL - Inductance Factor
(
__ 2
)
N
N/AWG - Number of Turns/Wire Size for Test Coil
l e : Effective Path Length
Ve : Effective Core Volume
Nl - Value of dc Ampere-turns
Fair-Rite Product's Catalog
Part Data Sheet, 8978101021
Printed: 2013-07-03
Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288
Phone: (888) 324-7748 www.fair-rite.com
See next page for further material specifications.
Fair-Rite Product's Catalog
Part Data Sheet, 8978101021
Printed: 2013-07-03
Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288
Phone: (888) 324-7748 www.fair-rite.com
Fair-Rite Product's Catalog
Part Data Sheet, 8978101021
Printed: 2013-07-03
Fair-Rite Products Corp. PO Box J,One Commercial Row, Wallkill, NY 12589-0288
Phone: (888) 324-7748 www.fair-rite.com