EFD Cores (8978101021)
Part Number: 8978101021
78 EFD CORE SET
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 center post gapped to a mechanical dimension or an A
L
value.
Weight indicated is per pair or set.
Weight: 0.9 (g)
Chart Legend
Σl/ A : Core Constant, l
e
: Effective Path
Length, A
e
: Effective Cross- Sectional Area, V
e
:
Effective Core Volume
A
L
: Inductance Factor
Explanation of Part Numbers: Digits 1 & 2 = product class and 3 & 4 = material grade.
Electrical Properties
A
L
(nH) 530 ±25%
Ae(cm
2
) 0.072
Σl/ A(cm
-1
) 32.7
l
e
(cm) 2.36
V
e
(cm
3
) 0.171
A
min
(cm
2
) 0.066
A
L
value is measured at 1 kHz, B < 10 gauss.
Fair- Rite Products Corp. • One Commercial Row, Wallkill, New York 12589-0288
888-324-7748 • 845-895-2055 • Fax: 845-895-2629 • ferrites@fair- rite.com • www.fair- rite.com
Dim mm mm tol nominal inch inch misc.
A 10.5 ± 0.30 0.413 _
B 5.2 ± 0.15 0.205 _
C 2.7 ± 0.20 0.106 _
D 3.75 ± 0.15 0.148 _
E 7.65 ± 0.30 0.301 _
F 4.55 ± 0.20 0.179 _
K 1.45 ± 0.10 0.057 _
