US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Wideband Transformers
Document 425-1
Document 425-1 Revised 04/27/12
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): 54 per tube
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
Surface mount and through hole versions
500 V interwinding isolation, 1/4 Watt RF input power
250 mA max current rating.
For a smaller package size, see our WBC Series
Dimensions – surface mount parts Dimensions – through hole parts
Dot indicates
pin 1
0.225
5,72
0.100
2,54
0.100
2,54
0.100
2,54
0.30
7,6
max
0.025
0,64 dia
typ
1
2
3
6
5
4
typ
Recommended
BoardLayout
0.300 ±0.010
7,62 ±0,25
90 -105

0.120
3,05 min
Dot indicates
pin 1
0.325
8,26 max
0.325
8,26 max
0.285
7,24 max
0.285
7,24 max
0.100
2,54
0.021
0,53 0.025
0,64
0.225
5,72
0.03
0,76
0.06
1,52
0.551
14,0
0.394
10,0
0.10
2,5
0.10
2,5
typ
typ
max
max
Recommended
Land Pattern
0.520 ±0.010
13,21 ±0,25
0.400
10,16 typ
0.004 /0,10
0.010 × 0.020
0,25 × 0,51 typ
1
2
3
6
5
4
Dimensions are in inches
mm Dimensions are in inches
mm
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest information.
Wideband Transformers
Document 425-2 Revised 04/27/12
Document 425-2
Impedance Insertion
Pri (pins 4
6) Sec (pins 1
3) DC
Part number ratio2 Bandwidth loss max L min3 DCR max4 L min3 DCR max4
imbalance5
Schematic SM1 TH pri : sec (MHz) (dB) (µH) (mOhm) (µH) (mOhm) max (mA)
WB1-1SL_ WB1-1L 1 : 1 0.150 – 500 0.70 27 75 27 75
WB1-6SL_ WB1-6L 1 : 1 0.100 – 350 0.50 25 100 25 100
WB1.18-3SL_ WB1.18-3L 1 : 1.18 0.040 – 300 0.50 90 300 108 330
WB1.5-6SL_ WB1.5-6L 1 : 1.5 0.050 – 325 0.26 56 120 84 150
WB2-1-2WSL_ WB2-1-2WL 1 : 2 0.080 – 700 1.00 38 100 75 150
WB2.5-6SL_ WB2.5-6L 1 : 2.5 0.080 – 225 0.26 30 100 75 130
WB4-6SL_ WB4-6L 1 : 4 0.100 – 125 0.50 25 100 100 200
WB9-1SL_ WB9-1L 1 : 9 0.125 – 125 0.57 25 100 225 250
WB16-1SL_ WB16-1L 1 : 16 0.050 – 100 0.60 56 75 896 330
WB36-1SL_ WB36-1L 1 : 36 0.100 – 45 0.50 25 50 900 180
WB1-1TSL_ WB1-1TL 1 : 1 0.100 – 375 0.51 25 100 25 100 30
WB1-6TSL_ WB1-6TL 1 : 1 0.050 – 200 0.20 70 150 70 150 18
WB2-1TSL_ WB2-1TL 1 : 2 0.070 – 400 1.00 38 100 75 150 29
WB2.5-6TSL_ WB2.5-6TL 1 : 2.5 0.050 – 125 0.28 56 120 140 200 13
WB3-1TSL_ WB3-1TL 1 : 3 0.040 – 500 0.40 96 110 270 200 4.0
WB4-1HSL_ WB4-1HL 1 : 4 0.100 – 500 0.50 25 120 100 160 15
WB4-6TSL_ WB4-6TL 1 : 4 0.050 – 200 0.50 43 120 172 160 5.0
WB5-1TSL_ WB5-1TL 1 : 5 0.050 – 400 0.30 48 220 240 500 13
WB8-1TSL_ WB8-1TL 1 : 8 0.150 – 400 0.76 18 100 144 270 17
WB13-1TSL_ WB13-1TL 1 : 13 0.150 – 125 0.72 17 90 221 200 10
WB16-6TSL_ WB16-6TL 1 : 16 0.050 – 100 0.60 56 75 896 330 25
WBT1-6SL_ WBT1-6L 1 : 1 0.040 – 200 0.25 70 150 70 150 19
WBT1.5-1SL_ WBT1.5-1L 1 : 1.5 0.040 – 350 0.30 60 150 90 180 19
WBT2.5-6SL_ WBT2.5-6L 1 : 2.5 0.050 – 100 0.26 70 150 175 200 11
WBT4-1SL_ WBT4-1L 1 : 3 0.040 – 150 0.26 45 120 135 160 13
WBT4-1ASL_ WBT4-1AL 1 : 4 0.040 – 350 0.40 96 110 384 220 3.5
WBT16-1SL_ WBT16-1L 1 : 16 0.100 – 100 0.50 25 100 400 300 7.5
WBT25-1SL_ WBT25-1L 1 : 25 0.100 – 65 0.50 25 100 625 350 6.0
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.
6
Pri Sec
43
1
Pri Sec
6
43
2
1
Pri Sec
6
5
43
2
1
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 425-3
Document 425-3 Revised 04/27/12
Transformers with no center taps
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1-6
3 dB bandwidth: 0.100 – 350 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1.5-6
3 dB bandwidth: 0.050 – 325 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB2.5-6
3 dB bandwidth: 0.080 – 225 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB4-6
3 dB bandwidth: 0.100 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB9-1
3 dB bandwidth: 0.125 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB36-1
3 dB bandwidth: 0.100 – 45 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1.18-3
3 dB bandwidth: 0.040 – 300 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB2-1-2W
3 dB bandwidth: 0.080 – 700 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1-1
3 dB bandwidth: 0.150 – 500 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB16-1
3 dB bandwidth: 0.050 – 100 MHz
Attenuation measured on a network analyzer (re: 50 Ohms)
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 425-4
Document 425-4 Revised 04/27/12
Transformers with secondary center tap
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1-1T
3 dB bandwidth: 0.100 – 375 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB2-1T
3 dB bandwidth: 0.070 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB1-6T
3 dB bandwidth: 0.050 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB2.5-6T
3 dB bandwidth: 0.050 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB4-1H
3 dB bandwidth: 0.100 – 500 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB4-6T
3 dB bandwidth: 0.050 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB13-1T
3 dB bandwidth: 0.150 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB3-1T
3 dB bandwidth: 0.040 – 500 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB5-1T
3 dB bandwidth: 0.050 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB8-1T
3 dB bandwidth: 0.150 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB16-6T
3 dB bandwidth: 0.050 – 100 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WB16-6T
3 dB bandwidth: 0.050 – 100 MHz
Attenuation measured on a network analyzer (re: 50 Ohms)
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Document 425-5
Document 425-5 Revised 04/27/12
Transformers with primary and secondary center taps
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT2.5-6
3 dB bandwidth: 0.050 – 100 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT4-1
3 dB bandwidth: 0.050 – 150 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT16-1
3 dB bandwidth: 0.100 – 100 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT25-1
3 dB bandwidth: 0.100 – 65 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT1-6
3 dB bandwidth: 0.040 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT1.5-1
3 dB bandwidth: 0.040 – 350 MHz
0
1
2
3
4
5
10.10.01 10 100 100
0
Attenuation (dB)
Frequency (MHz)
WBT4-1A
3 dB bandwidth: 0.040 – 350 MHz
Attenuation measured on a network analyzer (re: 50 Ohms)