Bobbins (9677001165)
Part Number: 9677001165
77 BOBBIN GROUND
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 8 = Coated Bobbin
Bobbins are an economical and well- proven core design for many applications where relatively low but stable inductance values
are required.
For higher frequency designs, use small bobbins in 43 material.
For power applications, bobbins in 77 material are specified for A
L
and dc bias limits.
Bobbins in Figures 2-5 can be supplied with a uniform thermo- set plastic coating which can withstand a minimum breakdown of
500Vrms. This coating will change the dimensions a maximum of 0.5 mm (0.020″). The last digit of the thermo- set plastic coated
part is an “8”.
For any bobbin requirement not listed in the catalog, please contact our customer service group for availability and
pricing.
Weight: 1.3 (g)
Dim mm mm tol
A
5.05 -0.15
B
12.7 ±0.25
D
10
+0.30
F
2.65 +0.10
G
0.5
±0.10
H
1
+0.10
nominal inch
0.196
0.5
0.4
0.107
0.02
0.042
inch misc.
_
_
_
_
_
_
Chart Legend
A
L
: Inductance Factor , Nl : Value of dc Ampere- turns, A
W
:Winding Area,
N/ AWG : Number of Turns/ Wire Size for Test Coil
Electrical Properties
A
L
(nH)
18 ±10%
A
L
min. @ Nl (At) 15 - 90
N/ AWG
30/24
2
A
w
(cm )
0.12
Bobbins are tested for A
L
value at 1kHz < 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
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