Tel : + 33 (0) 3 82 59 13 33 www.microspire.com
• Applied standards
:
ECSS-Q-ST-70-02C
,
MIL-STD-202
,
DO-160
and
ESCC 3201 generic specification for space products
• Power input max.
250
mW
• Isolation
prim.
to
sec.
500
VDC
minimum
• Suitable for IR and vapor reflow soldering
• SMD or through-hole cases
• Bandwidth
:
100
KHz
to
400
MHz
• Operating temperature
-
55
°C
to
+
125
°C
• Weight
:
1
gram
• Shielded version upon request
MB4x xxx
1
3
6
4
1
2
3
6
4
Standard Center tap
1
2
3
6
5
4
Shielded Version
Specifications may change without prior notice - Revised 06/08
PackagingApplications
Connections
Typical Dimensions
(mm)
10.1 ± 0.3
Surface-mount case
WRFT4# ### 1S
6.9 +0.2 -0
0.15
5.5
± 0.2
5.5
± 0.2
Pin Section
0.7 x 0.3
4.5
± 0.2
0.1
+0.2 -0
Pin Section
0.7 x 0.3
yywwP
Through-hole case
WRFT4# ### 1P
7.62
90°
105°
5.5
± 0.2
6.80
MAX
5.5
± 0.2
4.5
± 0.2
5.3 MAX
yywwP
yywwP
Pin 6 DOT
Weight :
1 gram
6°
5
4
1°
2-CT
3
SMD shielded case
WRFT4# ### 1Q
10.1 ± 0.3
7.10
MAX
3.556
PCB Layout
(suggested)
1
2
34
5
6
1
2
3 4
5
6
12
6
1.78
1.1
1.78
7.62
Drill Diameter
0.9 min.
Top
view
1
2
34
5
6
1
2
3 4
5
6
12
6
1.78
1.1
1.78
7.62
Drill Diameter
0.9 min.
Top
view
11.0
1.10
7.20
3.556
Marking
MB4x xxx:
Microspire part number
yyww : Date code
Wide Band RF Transformers -
WRFT
4x
Series
Electrical Data
(25°C)
ID Code Impedance ratio
(Ω) 3 dB
Bandwidth (MHz)
2 dB 1 dB
WRFT41 1R0 1X
50 : 50 0.35 - 400 0.35 - 200 2 - 50
WRFT41 2R0 1X
50 : 100 0.30 - 300 0.5 - 250 2 - 230
WRFT42 2R0 1X
50 : 100 center tap 0.10 - 200 0.5 - 100 2 - 50
WRFT41 2R5 1X
50 : 125 0.10 - 100 0.1 - 50 0.1 - 20
WRFT41 4R0 1X
50 : 200 0.20 - 350 0.35 - 300 2 - 100
WRFT42 5R0 1X
50 : 250 center tap 0.30 - 300 0.6 - 200 0.5 - 100
WRFT42 8R0 1X
50 : 400 center tap 0.10 - 140 0.1 - 90 1 - 60
WRFT41 12R 1X
50 : 600 0.20 - 110 0.5 - 80 1 - 50
WRFT41 13R 1X
50 : 650 0.30 - 130 0.4 - 85 1 - 65
WRFT42 13R 1X
50 : 650 center tap 0.30 - 120 0.7 - 80 5 - 20
WRFT41 16R 1X
50 : 800 0.30 - 120 0.7 - 80 5 - 20
WRFT42 16R 1X
50 : 800 center tap 0.10 - 75 0.2 - 30 0.3 - 20
To Order
WRFT4 # ### 1x
WRFT4 # ### 1 x
Range 1 = without center tap
2 = with center tap
Impedance
ratio
Version x = S surface mount
x = P through hole
x = Q Shielded
Impedance matching, DC isolation, balanced-unbalanced
mixing, power splitting, coupling and signal inversion
Individually packed in a
160
x
137
x
55
cardboard box.
40
parts on
2
layers
17
.....High Grade Technologies............
.....RF and Data Magnetics.............
.....Wide Band RF Transformers............
