INTERNET
http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers NORTH AMERICA 800-654-7949 · 417-335-5935 · Fax 417-335-5945 · EUROPE 44-1252-832600 · Fax 44-1252-837010
Mini-Circuits
®
Mini-Circuits ISO 9001 & ISO 14001 Certified
A
B
C
D
E
F
G
H
J
.30
.27
.23
.010
.042
.020
.100
.05
.05
7.62
6.86
5.84
0.25
1.07
0.51
2.54
1.27
1.27
K
L
M
N
P
Q
R
S
wt
.020
.036
.26
.575
.600
.125
.050
.100
grams
0.51
0.91
6.60
14.61
15.24
3.18
1.27
2.54
0.50
50 10 to 250 MHz
RF Transformer
Surface Mount
CASE STYLE: KK81
PRICE: $5.95 ea. QTY (1-9)
Outline Dimensions ( )
inch
mm
Maximum Ratings
Pin Connections
Operating Temperature
-20°C to 85°C
Storage Temperature
-55°C to 100°C
RF Power
2W
DC Current
30mA
Outline Drawing
Transformer Electrical Specifications
REV. A
M98898
T4-1-2W-KK81
IG/TD/CP
060810
Typical Performance Data
Config. C
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
RATIO
FREQUENCY
(MHz)
INSERTION LOSS*
3 dB
MHz
2 dB
MHz
1 dB
MHz
4
10-250
--
--
10-250
*Insertion Loss is referenced to mid-band loss, 0.3 dB typ.
T4-1-2W-KK81
INSERTION LOSS
0.0
0.2
0.4
0.6
0.8
1.0
0
50
100
150
200
250
FREQUENCY (MHz)
INSERTION
LOSS
(dB)
PRIMARY DOT
4
PRIMARY
6
SECONDARY DOT
3
SECONDARY
1
SECONDARY CT
--
NOT USED
2,5
FREQUENCY
(MHz)
INSERTION
LOSS
(dB)
INPUT
R. LOSS
(dB)
Features
· wideband, 10 to 250 MHz
· good return loss
· also available with plug-in (X65) and flat-pack (W38) leads
Applications
· HF/VHF
· receivers/transmitters
· impedance matching
T4-1-2W-KK81+
T4-1-2W-KK81
10.00
0.27
25.21
46.00
0.26
29.62
82.00
0.27
27.41
110.00
0.28
24.75
131.00
0.30
22.67
148.00
0.31
21.04
168.00
0.32
19.23
194.00
0.33
17.07
229.00
0.37
14.47
250.00
0.42
13.08
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