T4-1-KK81+
T4-1-KK81
Surface Mount
RF Transformer
50Ω
0.2 to 350 MHz
Features
Maximum Ratings
Operating Temperature
• wideband, 0.2 to 350 MHz
• good return loss
• also available with flat-pack (W38), plug-in (X65) leads
-20°C to 85°C
Storage Temperature
-55°C to 100°C
RF Power
0.25W
DC Current
30mA
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
Applications
Permanent damage may occur if any of these limits are exceeded.
• impedance matching
• receivers/transmitters
• balance antennas
Pin Connections
PRIMARY DOT
CASE STYLE: KK81
PRICE: $3.25 ea. QTY (1-9)
4
PRIMARY 6
SECONDARY DOT
3
SECONDARY
1
SECONDARY CT
2
NOT USED
5
Transformer Electrical Specifications
Ω
RATIO
FREQUENCY
(MHz)
INSERTION LOSS*
(Secondary/Primary)
3 dB
MHz
4
Outline Drawing
1 dB
MHz
0.2-350
0.2-350
2 dB
MHz
0.35-300
2-100
*Insertion Loss is referenced to mid-band loss, 0.6 dB typ.
Typical Performance Data
FREQUENCY
(MHz)
Outline Dimensions ( inch )
mm
A
.30
7.62
B
.27
6.86
C
.23
5.84
D
.010
0.25
E
.042
1.07
F
.020
0.51
G
.100
2.54
H
.05
1.27
J
.05
1.27
K
.020
0.51
L
.036
0.91
M
.26
6.60
N
.575
14.61
P
.600
15.24
Q
.125
3.18
R
.050
1.27
S
.100
2.54
wt
grams
0.50
INSERTION
LOSS
(dB)
INPUT
R. LOSS
(dB)
0.20 2.06 3.31
0.35 1.33 7.01
0.50 1.13 9.36
1.00 0.92 12.67
2.00 0.72 15.24
5.00 0.59 17.34
100.00 0.73 15.07
175.10 0.91 12.93
300.00 1.23 12.36
350.00 1.34 13.08
T4-1-KK81
INPUT RETURN LOSS
T4-1-KK81
INSERTION LOSS
25
RETURN LOSS (dB)
Config. A
INSERTION LOSS (dB)
5.0
4.0
3.0
2.0
1.0
0.0
20
15
10
5
0
0
50
100
150
200
250
300
FREQUENCY (MHz)
350
0
50
100
150
200
250
300
350
FREQUENCY (MHz)
Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled
to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp
Mini-Circuits
®
www.minicircuits.com P.O. Box 35166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
REV. A
M98898
T4-1-KK81
IG/TD/CP
131122
