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—
291A & 291B series
A. Electrical specification
Part
No.
291A-01
291A-02
291A-03
291A-04
291A-05
291B-06
291B-07
291B-08
291B-09
291B-10
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
Tolerance.
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.
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
150 MHz
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
(A max.)
4
4
4
4
4
4
4
4
4
4
B. Mechanical dimensions: (Unit: mm)
Series No.
291A
291B
a
3.05(MAX)
3.05(MAX)
b
0.58±0.38
0.58±0.38
c
3.18(MAX)
3.18(MAX)
d
3.68(MAX)
6.86(MAX)
e
2.92±0.25
5.84±0.25
Mechanical dimension
Land Pattern
C. Land Pattern: (Unit: mm)
Series No.
291A
291B
a
4.19
7.24
b
3.30
3.30
c
1.65
4.70
d
2.79
2.79
e
1.27
1.27
D. Notes:
1. Tolerance:
a. 291A-01: K = ± 10 % only.
b. 291A-02: J = ± 5 % or K = ± 10 %.
c. 291A-03 through 291A-05 and for 291B-06 through 291B-10: J = ± 5 % or G = ± 2 %
2. Inductance & Q measured on the HP4291B with HP16193 test fixture.
3. SRF measured on the HP8720D or HP8753E.
4. Operating temp. : -40ºC TO +125ºC.
5. For Temperature Rise: 15ºC.
6. Inductance Range:
291A & 291B: From 2.5nH to 43.0nH. (@ 25ºC.)
7. Equivalent to Coilcraft’s “Mini Spring” Air Core Inductor.
8.
RoHS
compliant.
SMD Air Coil: P/N 291A & 291B Series
Rev. B
Feb. 01 2007. Page: 1 of 2
FRONTIER [ FRONTIER ELECTRONICS. ]
