ETD Cores (9578343502)
Part Number: 9578343502
78 ETD CORE SET
ETD cores have been designed to make optimum use of a given volume of ferrite material for maximum throughput
power, specifically for forward converter transformers. The structure, which includes a round center post, approaches a
nearly uniform cross- sectional area throughout the core and provides a winding area that minimizes winding losses. ETD
cores are used mainly in switched- mode power supplies and permit off- line designs where IEC and VDE isolation
requirements must be met.
ETD 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: 40 (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) 2500 ±25%
Ae(cm
2
) 0.972
Σl/ A(cm
-1
) 8.2
l
e
(cm) 7.9
V
e
(cm
3
) 7.68
A
min
(cm
2
) 0.916
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 34.2 ± 0.65 1.346 _
B 17.3 ± 0.20 0.681 _
C 10.8 ± 0.30 0.425 _
D 12.1 ± 0.20 0.476 _
E 25.6 min 1.008 min
F 10.8 ± 0.30 0.425 _
