2743021447L Fair-Rite, 2743021447L Datasheet - Page 99

• Manufacturer Part Number: 2743021447L
• Manufacturer: Fair-Rite

Specifications of 2743021447L

• Lead Free Status / RoHS Status: Not Compliant

F a ir-Ri te Prod uct s C o rp .
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The inductance modifier is found in Figure 2. The ratio winding length divided by the rod length will give the induc-
tance modifier. If the rod is totally wound the K = 1. Shorter but centered windings will yield higher K values.
Using the rod 3061990871 as an example.
For this rod the length over diameter ratio is 8.33 and for 61 material Figure 1 gives a Urod of 29.The rod has an Ae
= 0.0707 cm
A winding of 80 turns of 30 AWG wire will yield a fully wound rod, therefore K = 1.
Using the above formula the calculated inductance is 65.96 uH.
The same rod but wound with 50 turns of the 30 AWG wire has a winding length of 1.5 cm.The inductance modifier
is 1.5/2.5 = 0.60, which results from Figure 2 in a K value of 1.51.
Again with the above formula we calculated an inductance of 38.9 uH.
The measured values for both windings were 66.95 and 39.50 uH respectively.
Rod Information
(888) FAIR RITE / [phone] • FAX: (888) FERRITE / [phone]
[phone]
%
102
101
100
99
98
2
-40 -20 0
Typical change in Inductance vs. Temperature
and l = 2.5 cm.
33 Mtl.
Rods are 3.125 x 25.4 mm (L/D 8.1) wound with
67T #28AWG in a single layer.
77 Mtl.
Temperature (
20
Figure 4
40
%
60
O
110
105
100
C)
95
90
85
80
-40 -20 0
61 Mtl.
78 Mtl.
52 Mtl.
67 Mtl.
All rods are 2.0 x 15.0 mm (L/D 7.5) wound with
49T #30AWG in a single layer
Typical change in inductance vs. Temperature
100 120
(888) 337 -7483
Temperature ( 0 C)
Figure 3
20
40
60
80
100 120
110
108
106
104
102
100
98
96
94
92
90
-40 -20
Rod diameter is 3.0mm, with lengths from 6.0 to 30.0 mm.
Rods are wound with a single layer.
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PO Box J, One Commercial Row, Wallkill, NY 12589-0288
0
Temperature(
20
52 Material
Figure 5
40
60
o
C)
80
100 120
L/D = 10
L/D = 4
L/D = 7
L/D = 2