TT25-1-KK81+ [MINI]
RF Transformer;
MINI-CIRCUITS 
RSurFfaceTMoruant nsformer
TT25-1-KK81+
TT25-1-KK81
50Ω
0.02 to 30 MHz
Features
Maximum Ratings
Operating Temperature
Storage Temperature
RF Power
CASE STYLE: KK81
• excellent return loss
• also available with plug-in (X65)
and flat-pack (W38) leads
-20°C to 85°C
55°C to 100°C
250mW
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
DC Current
30mA
Permanent damage may occur if any of these limits are exceeded.
Applications
• HF
• radio communication systems
• impedance matching
• ham radio
Pin Connections
PRIMARY DOT
4
6
5
3
1
2
PRIMARY
PRIMARY CT
SECONDARY DOT
SECONDARY
SECONDARY CT
Transformer Electrical Specifications
Ω
FREQUENCY
(MHz)
INSERTION LOSS*
RATIO
(Secondary/Primary)
3 dB
2 dB
1 dB
MHz
MHz
MHz
25
0.02-30
0.02-30
0.05-20
0.1-10
Outline Drawing
* Below 0.05 MHz, Insertion Loss is specified for room temperature and above.
Typical Performance Data
FREQUENCY
(MHz)
INSERTION
LOSS
INPUT
R. LOSS
(dB)
(dB)
0.02
0.03
0.05
0.07
0.15
0.30
1.01
4.66
20.13
30.00
2.72
1.86
1.18
0.80
0.48
0.37
0.27
0.30
1.46
2.60
6.13
7.95
inch
Outline Dimensions (
)
mm
10.45
13.16
19.05
25.11
28.34
12.69
2.94
A
.30
7.62
B
.27
C
.23
D
.010
0.25
E
.042
1.07
F
.020
0.51
G
.100
2.54
H
J
.05
1.27
.05
6.86
5.84
1.27
K
.020
0.51
L
.036
0.91
M
.26
N
.575
P
.600
Q
.125
3.18
R
.050
1.27
S
wt
.100 grams
2.54 0.50
6.60 14.61 15.24
2.00
TT25-1-KK81
INPUT RETURN LOSS
TT25-1-KK81
INSERTION LOSS
50
5.0
4.0
3.0
2.0
1.0
0.0
40
30
20
10
0
Config. B
0.01
0.1
1
10
100
0.01
0.1
1
10
100
FREQUENCY (MHz)
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
REV. B
M151107
TT25-1-KK81
IG/TD/CP
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
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