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Frontier Electronics Corp.
667 E. COCHRAN STREET, SIMI VALLEY, CA 93065 TEL: (805) 522-9998 FAX: (805) 522-9989 E-mail: frontiersales@frontierusa.com Web: http://www.frontierusa.com
SMD Air Wound Coils--294A series
A. Electrical specifications:
Part No.
294A-09 294A-10 294A-11 294A-12 294A-13 294A-14 294A-15 294A-16 294A-17 294A-18 294A-19 294A-20
Turns
9 10 11 12 13 14 15 16 17 18 19 20
L (nH) Tolerance
90 111 130 169 206 222 246 307 380 422 491 538 J, G J, G J, G J, G J, G J, G J, G J, G J, G J, G J, G J, G
Q (min) 95 87 87 95 95 92 95 95 95 95 95 87
Q (Typ) 114 104 104 114 114 110 114 114 114 114 114 104
Test Freq. 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz 50 MHz
DCR (m) 15 15 20 25 30 35 35 35 50 60 65 90
SRF min (MHz) 1140 1020 900 875 800 730 685 660 590 540 535 490
I DC (A max.) 3.5 3.5 3.0 3.0 3.0 3.0 3.0 3.0 2.5 2.5 2.0 2.0
B. Mechanical dimensions: (Unit: mm)
Series No.
294A
a
6.35(MAX)
b
1.020.39
c
5.9(MAX)
d
10.55(MAX)
e
7.980.51
Mechanical dimension C. Land Pattern: (Unit: mm)
Series No.
294A
Land Pattern
c
5.95
a
10.0
b
4.70
d
2.42
e
2.04
D. Notes:
1. 2. 3. 4. 5. 6. Tolerance: J = 5 % or G= 2 %. Inductance & Q measured on the HP4291B with HP16193 test fixture. SRF measured on the HP8753E. Operating temp. : -40C TO +125C. For Temperature Rise: 15C. Inductance Range: (@ 25C.) 294A: From 90nH to 538nH. 7. Equivalent to Coilcraft's "Maxi Spring" Air Core Inductor. 8. RoHS compliant.
SMD Air Coil: P/N 294A-series
Rev. A
Jan. 01, 2006. Page: 1 of 2
Frontier Electronics Corp.
667 E. COCHRAN STREET, SIMI VALLEY, CA 93065 TEL: (805) 522-9998 FAX: (805) 522-9989 E-mail: frontiersales@frontierusa.com Web: http://www.frontierusa.com
SMD Air Wound Coils--294A series
E. Characteristic curve:
1. L vs. Frequency:
1000 900 800 700
Inductance (nH)
2 9 4 A -2 0
600 500 400 300 200 100 0 1 10 100 1000
2 9 4 A -1 2 2 9 4 A -1 6
2 9 4 A -0 9
F r e q u e n c y (M H z )
2. Typical Q vs. Frequency:
140
2 9 4 A -0 9
130 120 110 100
2 9 4 A -2 0
2 9 4 A -1 6
2 9 4 A -1 2
Q
90 80 70 60 50 10 100 1000
F r e q u e n c y (M H z )
SMD Air Coil: P/N 294A-series
Rev. A
Jan. 01, 2006. Page: 2 of 2

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