291A & 291B Series – SMD AIR WOUND COIL
A. Electrical Specifications:
P/N
291A-01_
291A-02_
291A-03_
291A-04_
291A-05_
291B-06_
291B-07_
291B-08_
291B-09_
291B-10_
Rev. A
Turns
1
2
3
4
5
6
7
8
9
10
L
(nH)
2.5
5.0
8.0
12.5
18.5
17.5
22.0
28.0
35.5
43.0
Tol.
K
K, J
J, G
J, G
J, G
J, G
J, G
J, G
J, G
J, G
Q
Min.
145
140
140
137
132
100
102
105
112
106
Test Freq.
(MHz)
150
150
150
150
150
150
150
150
150
150
DCR max.
(mΩ)
1.1
1.8
2.6
3.4
3.9
4.5
5.2
6.0
6.8
7.9
SRF min.
(GHz)
12.5
6.5
5.0
3.3
2.5
2.2
2.1
1.8
1.5
1.2
I DC max.
(A)
4
4
4
4
4
4
4
4
4
4
B. Dimensions: mm (Inch):
Series
291A
Tol.
291B
Tol.
a
3.05
(0.120)
Max.
3.05
(0.120)
Max.
b
0.58
(0.023)
±0.38
(0.015)
0.58
(0.023)
±0.38
(0.014)
c
3.18
(0.125)
Max.
3.18
(0.125)
Max.
d
3.68
(0.145)
Max.
6.86
(0.270)
Max.
e
2.92
(0.115)
±0.25
(0.010)
5.84
(0.230)
±0.25
(0.010)
f
4.19
(0.165)
Typ.
7.24
(0.285)
Typ.
g
3.30
(0.130)
Typ.
3.30
(0.130)
Typ.
h
1.65
(0.065)
Typ.
4.70
(0.185)
Typ.
i
2.79
(0.110)
Typ.
2.79
(0.110)
Typ.
j
1.27
(0.05)
Typ.
1.27
(0.05)
Typ.
Foot Print
C. General Information:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
P/N: 291A-xx_, “291A” = Type, “xx” = Dash number, “_” = Inductance tolerance
P/N: 291B-xx_, “291B” = Type, “xx” = Dash number, “_” = Inductance tolerance
Tolerance “_”: G: ± 2%, J: ± 5%, K: ± 10%
Small and lightweight surface mounting type
High Q at high frequency
High self-resonance frequency
Maximum Temperature Rise: 15ºC (when measured at 25ºC ambient)
Inductance & Q measured with HP4291B Impedance Analyzer with HP16193 test fixture
SRF measured using the HP8753E Network Analyzer or equivalent
DCR measured using the Chroma 16502 or equivalent
Operating temperature: -40°C to +125ºC
Storage temp. : -40ºC to +85ºC
Inductance and Current Range: From 2.5 nH (4.0A) to 43.0 nH (4.0A)
SRF: From 1200 MHz to 12500 MHz
MSL: Level 1
D. Applications:
1.
2.
3.
4.
5.
6.
Game Consoles
Set Top Boxes
Cables Modems
Computers
Mobile Communication Devices (Cell Phones, Radios, etc.)
RF Filters
Frontier Electronics Corp.
®
http://www.frontierusa.com
Page
1
of
2
667 E. Cochran St., Simi Valley, CA 93065
Phone: 1-805-522-9998, Fax: 1-805-522-9989
291A & 291B Series – SMD AIR WOUND COIL
E. Characteristic Curve
Inductance vs. Frequency
291A Series
25
20
Inductance (nH)
291A-05
291A-04
Rev. A
291B Series
150
291B-10
Inductance (nH)
100
15
10
5
0
10
100
1000
291B-09
291A-03
291B-08
50
291B-07
291B-06
291A-02
291A-01
0
1000
10
100
1000
10000
Frequency (MHz)
Frequency (MHz)
Q vs. Frequency
291A Series
210
180
150
120
291A-01
291A-02
291A-03
291A-04
291A-05
291B Series
Q
90
60
30
0
100
1000
10000
Frequency (MHz)
Frontier Electronics Corp.
®
http://www.frontierusa.com
Page
2
of
2
667 E. Cochran St., Simi Valley, CA 93065
Phone: 1-805-522-9998, Fax: 1-805-522-9989
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