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: frontierusa.com
SMD Balun Transformer—
SBT203-series
A. Electrical specifications:
Part No.
SBT203-11
SBT203-21
Turn Ratio
1:1
2:1
Insertion Loss 3 dB Max.
@3~300MHz
@6~400MHz
B. Mechanical dimensions: (Unit: mm)
M1
Dimension
Tolerance
4.4
Max.
M2
M2
5.50
Max.
M3
1.50
± 0.30
M4
M4
3.20
Max.
M5
0.50
± 0.15
6.20mm
2.90mm
6
M1
4
1
2
3
M3
M3
N1
M5
N2
N3
3.0 mm
3.8
mm
0.80 mm
Mechanical dimension
Schematic
Land Pattern
C. Test configuration and connection:
(a) SBT-203-11:
(b) SBT-203-21:
D.
Note:
RoHS
compliant; for the
ROHS
parts, we add “-LFR” at the end of the P/N.
SMD Balun Transformer SBT203-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: frontierusa.com
SMD Balun Transformer—
SBT203-series
E. Characteristic curve:
SBT203-11
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
1
10
100
1000
I.L.
(dB)
Frequency (MHz)
SBT203-21
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
1
10
100
1000
I.L.
(dB)
Frequency (MHz)
SMD Balun Transformer SBT203-series
Rev. A
Jan. 01, 2006. Page: 2 of 2
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