Document 425-1
Wideband Transformers
• Surface mount and through hole versions
• 500 Vrms, 1 minute interwinding isolation (hipot),
1/4 Watt RF input power
• 250 mA max current rating.
• For a smaller package size, see our WBC Series
Core material
Ferrite
Terminations
RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight
0.38 – 0.40 g
Ambient temperature
–40°C to +85°C
Storage temperature
Component: –40°C to +85°C.
Tape and reel or tube 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
(SM version): 500 per 13″ reel;
Plastic tape: 24 mm wide, 0.42 mm thick, 20 mm pocket spacing,
6.6 mm pocket depth; (TH version): 70 per tube
PCB washing
Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See
Doc787_PCB_Washing.pdf.
Dimensions – surface mount parts
Dot indicates
pin #1
WBxxxx
XXXX Y
Part
number
Internal
code
Dimensions – through hole parts
Dot indicates
pin #1
WBxxxx
XXXX Y
Part
number
Internal
code
Parts manufactured prior
to August 2015 may be
marked differently.
0.325 max
8,26
0.225 max
5,72
0.021
typ
0,53
0.100
typ
2,54
Dot indicates
pin 1
0.285 max
7,24
0.325 max
8,26
0.225 max
5,72
0.285 max
7,24
0.004 /0,10
0.025max
0,64
0.400
typ
10,16
0.520 ±0.010
13,21 ±0,25
0.551
14,0
0.394
10,0
1
2
3
6
5
4
0.120
min
3,05
0.100
typ
2,54
0.010 × 0.020 typ
0,25 × 0,51
90 °-105 °
0.300 ±0.010
7,62 ±0,25
0.30
7,6
0.079
2,00
0.10
2,5
0.10
2,5
0.100
2,54
0.100
2,54
1
2
3
6
5
4
0.025 dia typ
0,64
inches
Dimensions are in
mm
0.03
0,76
Recommended
Land Pattern
Dimensions are in
inches
mm
Recommended
Board Layout
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 425-1
Revised 08/11/17
© Coilcraft Inc. 2018
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 425-2
Wideband Transformers
Schematic
Part number
1
SM
TH
WB1-1SL_
WB1-6SL_
WB1.18-3SL_
WB1.5-6SL_
WB2-1-2WSL_
WB2.5-6SL_
WB4-6SL_
WB9-1SL_
WB16-1SL_
WB36-1SL_
WB1-1TSL_
WB1-6TSL_
WB2-1TSL_
WB2.5-6TSL_
WB3-1TSL_
WB4-1HSL_
WB4-6TSL_
WB5-1TSL_
WB8-1TSL_
WB13-1TSL_
WB16-6TSL_
WBT1-6SL_
WBT1.5-1SL_
WBT2.5-6SL_
WBT4-1SL_
WBT4-1ASL_
WBT16-1SL_
WBT25-1SL_
WB1-1L
WB1-6L
WB1.18-3L
WB1.5-6L
WB2-1-2WL
WB2.5-6L
WB4-6L
WB9-1L
WB16-1L
WB36-1L
WB1-1TL
WB1-6TL
WB2-1TL
WB2.5-6TL
WB3-1TL
WB4-1HL
WB4-6TL
WB5-1TL
WB8-1TL
WB13-1TL
WB16-6TL
WBT1-6L
WBT1.5-1L
WBT2.5-6L
WBT4-1L
WBT4-1AL
WBT16-1L
WBT25-1L
Impedance
ratio
2
pri : sec
1
:
1
1
:
1
1
:
1.18
1
:
1.5
1
:
2
1
:
2.5
1
:
4
1
:
9
1
:
16
1
:
36
1
:
1
1
:
1
1
:
2
1
:
2.5
1
:
3
1
:
4
1
:
4
1
:
5
1
:
8
1
:
13
1
:
16
1
:
1
1
:
1.5
1
:
2.5
1
:
3
1
:
4
1
:
16
1
:
25
Insertion
Bandwidth loss max
(MHz)
(dB)
0.150 – 500
0.100 – 350
0.040 – 300
0.050 – 325
0.080 – 700
0.080 – 225
0.100 – 125
0.125 – 125
0.050 – 100
0.100 – 45
0.100 – 375
0.050 – 200
0.070 – 400
0.050 – 125
0.040 – 500
0.100 – 500
0.050 – 200
0.050 – 400
0.150 – 400
0.150 – 125
0.050 – 100
0.040 – 200
0.040 – 350
0.050 – 100
0.040 – 150
0.040 – 350
0.100 – 100
0.100 – 65
0.70
0.50
0.50
0.26
1.00
0.26
0.50
0.57
0.60
0.50
0.51
0.20
1.00
0.28
0.40
0.50
0.50
0.30
0.76
0.72
0.60
0.25
0.30
0.26
0.26
0.40
0.50
0.50
Pri (pins 4 – 6)
L min
3
DCR max
4
(µH)
(mOhm)
27
25
90
56
38
30
25
25
56
25
25
70
38
56
96
25
43
48
18
17
56
70
48
70
45
96
25
25
75
100
300
120
100
100
100
100
75
50
100
150
100
120
110
120
120
220
100
90
75
150
150
150
120
110
100
100
Sec (pins 1 – 3)
L min
3
DCR max
4
(µH)
(mOhm)
27
25
108
84
75
75
100
225
896
900
25
70
75
140
270
100
172
240
144
221
896
70
70
175
135
384
400
625
75
100
330
150
150
130
200
250
330
180
100
150
150
200
200
160
160
500
270
200
330
150
180
200
160
220
300
350
DC
imbalance
5
max (mA)
—
—
—
—
—
—
—
—
—
—
30
18
29
13
4.0
15
5.0
13
17
10
25
19
19
11
13
3.5
7.5
6.0
Pri
Sec
6
1
4
3
6
Pri
Sec
1
2
4
3
6
5
4
Pri
Sec
1
2
3
1. When ordering, please specify
packaging
code:
WB25-1SLD
Packaging: D
= 13″ machine-ready reel. EIA-481 embossed plastic tape (500 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 D instead.
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 max imbalance.
6. Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
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 425-2
Revised 08/11/17
© Coilcraft Inc. 2018
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 425-3
Transformers with no center taps
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1-1
3 dB bandwidth: 0.150 – 500 MHz
Frequency (MHz)
1
10
100
1000
WB2.5-6
3 dB bandwidth: 0.080 – 225 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1-6
3 dB bandwidth: 0.100 – 350 MHz
Frequency (MHz)
1
10
100
1000
WB4-6
3 dB bandwidth: 0.100 – 125 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1.18-3
3 dB bandwidth: 0.040 – 300 MHz
Frequency (MHz)
1
10
100
1000
WB9-1
3 dB bandwidth: 0.125 – 125 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1.5-6
3 dB bandwidth: 0.050 – 325 MHz
Frequency (MHz)
1
10
100
1000
WB16-1
3 dB bandwidth: 0.050 – 100 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
WB2-1-2W
3 dB bandwidth: 0.080 – 700 MHz
Frequency (MHz)
1
10
100
1000
WB36-1
3 dB bandwidth: 0.100 – 45 MHz
0.1
Frequency (MHz)
1
10
100
1000
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 425-3
Revised 08/11/17
© Coilcraft Inc. 2018
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 425-4
Transformers with secondary center tap
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1-1T
3 dB bandwidth: 0.100 – 375 MHz
Frequency (MHz)
1
10
100
1000
WB4-6T
3 dB bandwidth: 0.050 – 200 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB1-6T
3 dB bandwidth: 0.050 – 200 MHz
Frequency (MHz)
1
10
100
1000
WB5-1T
3 dB bandwidth: 0.050 – 400 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB2-1T
3 dB bandwidth: 0.070 – 400 MHz
Frequency (MHz)
1
10
100
1000
WB8-1T
3 dB bandwidth: 0.150 – 400 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB2.5-6T
3 dB bandwidth: 0.050 – 125 MHz
Frequency (MHz)
1
10
100
1000
WB13-1T
3 dB bandwidth: 0.150 – 125 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WB3-1T
3 dB bandwidth: 0.040 – 500 MHz
Frequency (MHz)
1
10
100
1000
WB16-6T
3 dB bandwidth: 0.050 – 100 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
0
1
2
3
4
5
0.01
0.1
WB4-1H
3 dB bandwidth: 0.100 – 500 MHz
Frequency (MHz)
1
10
100
1000
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 425-4
Revised 08/11/17
© Coilcraft Inc. 2018
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 425-5
Transformers with primary and secondary center taps
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WBT1-6
3 dB bandwidth: 0.040 – 200 MHz
Frequency (MHz)
1
10
100
1000
WBT4-1A
3 dB bandwidth: 0.040 – 350 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
0.1
WBT1.5-1
3 dB bandwidth: 0.040 – 350 MHz
Frequency (MHz)
1
10
100
1000
WBT16-1
3 dB bandwidth: 0.100 – 100 MHz
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
1
2
3
4
5
0.01
0.1
Attenuation (dB)
0
0
1
2
3
4
5
0.01
WBT2.5-6
3 dB bandwidth: 0.050 – 100 MHz
Frequency (MHz)
1
10
100
1000
WBT25-1
3 dB bandwidth: 0.100 – 65 MHz
0.1
Frequency (MHz)
1
10
100
1000
Attenuation (dB)
0
1
2
3
4
5
0.01
0.1
WBT4-1
3 dB bandwidth: 0.050 – 150 MHz
Frequency (MHz)
1
10
100
1000
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 425-5
Revised 08/11/17
© Coilcraft Inc. 2018
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.
