Document 424 -1
Mini Wideband Transformers – WBC
• Smallest wideband transformer: 4 mm square 3 mm high
• 300 Vrms interwinding isolation, 1/4 Watt RF input power
• 250 mA max current rating.
Designer’s Kit C393
contains three of each part
Core material
Ferrite
Terminations
RoHS compliant tin-silver-copper over silver-plati-
num-glass frit. Other terminations available at additional cost.
Weight
68.0 – 88.8 mg
Ambient temperature
–40°C to +85°C
Storage temperature
Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat
Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
60 per billion hours / 16,666,667 hours, calculated per Telcordia SR-332
Packaging
750/7″reel; 2500/13″ reel Plastic tape: 12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 2.9 mm pocket depth
PCB washing
Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See
Doc787_PCBt_Washing.pdf.
Impedance
Part
ratio
2
1
number
Schematic
pri : sec
WBC1-1L_
A
1
:
1
WBC1-1TL_
B
1
:
1
WBC2-1TL_
B
1
:
2
WBC3-1TL_
B
1
:
3
WBC4-1TL_
B
1
:
4
WBC4-14L_
B
1
:
4
WBC4-1WL_
B
1
:
4
WBC4-6TL_
B
1
:
4
WBC8-1L_
D
1
:
8
WBC9-1L_
B
1
:
9
WBC16-1TL_
B
1
:
16
WBC4-4L_
C
1
:
4
Insertion
Bandwidth loss max
(MHz)
(dB)
0.400 – 600
0.40
0.250 – 750
0.58
0.200 – 500
0.50
0.300 – 900
0.60
0.250 – 750
1.0
1.500 – 1200
2.0
0.500 – 1000
0.90
0.300 – 700
0.65
0.150 – 600
0.60
0.300 – 500
0.54
0.600 – 300
0.80
0.250 – 800
1.0
Pins 4 – 6 (primary) Pins 1 – 3 (secondary)
DC
L min
3
DCR max
4
L min
3
DCR max
4
imbalance
5
(µH)
(mOhm)
(µH)
(mOhm)
max (mA)
10
120
10
120
—
9.5
75
9.5
75
36
10
120
20
150
8.5
9
100
27
150
8.5
9
55
36
120
30
2
50
8
100
15
5
80
20
120
10
9
80
36
200
7.5
22
120
176
310
17
9
80
81
230
5
5
80
80
230
5
9
60
36
120
30
Color
dot
Brown
Brown
Red
Orange
Yellow
Green
White
Blue
Gray
White
Violet
Yellow
1. When ordering, please specify
termination
and
packaging
codes:
WBC4-4LC
Termination: L
= RoHS compliant tin-silver-copper (95.5/4/0.5) over silver-
platinum -glass frit.
Special order:
S
= non-RoHS tin-lead (63/37).
Packaging: C
= 7″ machine-ready reel. EIA-481 embossed plastic tape
(750 parts per full reel).
B
= Less than full reel. In tape, but not machine ready. To have
a leader and trailer added ($25 charge), use code letter C
instead.
D
= 13″ machine-ready reel. EIA-481 embossed plastic tape.
Factory order only, not stocked (2500 parts per full reel).
2. Impedance ratio is for the full primary winding to the full secondary winding.
3. Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/HP 4192 or
equivalent.
4. DCR measured on a micro-ohmmeter.
5. DC imbalance is the maximum difference in current measured at pins 1 and 3
with the source at pin 2. Inductance drop is 15% at maximum imbalance.
6. Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Schematics
A
6
Pri
4
3
1
2 Sec
3
1
Sec
C
6
Pri 5
4
1
2 Sec
3
1
2 Sec
B
6
Pri
4
D
Pri
6
4
3
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 424-1
Revised 07/01/15
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 424-2
WBC Series SMT Mini Wideband Transformers
Dimensions
Dot indicates pin 1
0.175
max
4,45
0.165
max
4,19
0.120 max
3,05
0.150
*
3,81
6
5
4
0.030
0,76
0.060
1,52
1
2
3
0.040
1,02
0.150
*
3,81
0.120
3,05
Recommended
Land Pattern
6
5
4
1
2
0.060
1,52
3
0.045
1,14
*
Nominal dimensions
of the substrate
0.030
0,76
Dimensions are in
inches
mm
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 424-2
Revised 07/01/15
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 424-3
WBC Series SMT Mini Wideband Transformers
0
WBC1-1L
Attenuation (dB)
1
2
5
4
3
2
1
0
-1
-2
-3
WBC1-1L
3
4
5
0.01
0.1
3 dB bandwidth: 0.400 – 600 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
10
100
1000
10000
15
12
9
6
3
0
-3
-6
-9
-12
-15
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC1-1TL
WBC1-1TL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.250 – 750 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC2-1TL
WBC2-1TL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.200 – 500 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC3-1TL
WBC3-1TL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.300 – 900 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
Frequency (MHz)
Attenuation measured on a network analyzer (re: 50 Ohms)
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 424-3
Revised 07/01/15
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Degrees
dB
Degrees
dB
Degrees
dB
Degrees
dB
Document 424-4
WBC Series SMT Mini Wideband Transformers
0
WBC4-1TL
Attenuation (dB)
1
2
5
4
3
2
1
0
-1
-2
-3
WBC4-1TL
3
4
5
0.01
0.1
3 dB bandwidth: 0.250 – 750 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
10
100
1000
10000
15
12
9
6
3
0
-3
-6
-9
-12
-15
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC4-14L
WBC4-14L
Attenuation (dB)
1
2
3
4
5
0.01
0.1
1
3 dB bandwidth: 1.50 – 1200 MHz
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC4-1WL
WBC4-1WL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.500 – 1000 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC4-6TL
WBC4-6TL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.300 – 700 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
Frequency (MHz)
Attenuation measured on a network analyzer (re: 50 Ohms)
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 424-4
Revised 07/01/15
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Degrees
dB
Degrees
dB
Degrees
dB
Degrees
dB
Document 424-5
WBC Series SMT Mini Wideband Transformers
0
WBC8-1L
Attenuation (dB)
1
2
5
4
3
2
1
0
-1
-2
-3
WBC8-1L
3
4
5
0.01
0.1
3 dB bandwidth: 0.150 – 600 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
10
100
1000
10000
15
12
9
6
3
0
-3
-6
-9
-12
-15
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC9-1L
WBC9-1L
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.300 – 500 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC16-1TL
WBC16-1TL
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.600 – 300 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
5
4
3
2
1
0
-1
-2
-3
Frequency (MHz)
15
12
9
6
3
0
-3
-6
-9
-12
-15
10
100
1000
10000
0
WBC4-4L
WBC4-4L
Attenuation (dB)
1
2
3
4
5
0.01
0.1
3 dB bandwidth: 0.250 – 800 MHz
1
10
100
1000
10000
-4
-5
Phase imbalance
Magnitude imbalance
0.01
0.1
1
Frequency (MHz)
Frequency (MHz)
Attenuation measured on a network analyzer (re: 50 Ohms)
US
+1-847-639-6400 sales@coilcraft.com
UK
+44-1236-730595 sales@coilcraft-europe.com
Taiwan
+886-2-2264 3646 sales@coilcraft.com.tw
China
+86-21-6218 8074 sales@coilcraft.com.cn
Singapore
+ 65-6484 8412 sales@coilcraft.com.sg
Document 424-5
Revised 07/01/15
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Degrees
dB
Degrees
dB
Degrees
dB
Degrees
dB
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