© Coilcraft, Inc. 2006
Wideband Transformers
Document 425-1
Specifications subject to change without notice. Document 425-1 Revised 11/03/05
These wideband transformers are offered in tapped or
untapped configurations in a low-profile DIP-style plastic
case. They are available in a through-hole version com-
patible with standard DIP sockets and a surface mount
version that is packaged in tape and reel. All parts feature
500 V isolation, 250 mA current handling capability and a
1/4 Watt RF power rating. (For a smaller package size,
see our WBC Series.)
Applications include impedance matching, voltage or
current transformation, DC isolation, balanced/unbalanced
mixing, matching, power splitting, coupling and signal
inversion.
Custom wideband transformers with special combinations
of impedance ratio, insertion loss, frequency response
and current handling are also available.
Free evaluation samples are available by contacting
Coilcraft or by visiting www.coilcraft.com.
1. When ordering, please specify packaging code:
WB25-1LSD
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.
6
43
1
2. Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/
HP 4192 or equivalent.
3. DCR measured on a micro-ohmmeter.
4. 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.
5. Operating temperature range -40°C to +85°C.
6. Electrical specifications at 25°C.
6
5
43
2
1
6
43
2
1
Impedance Insertion Pins 4
–
6 Pins 1
–
3DC
Part number ratio Bandwidth loss max L min2DCR max3L min2DCR max3imbalance4
Schematic SM1TH pri : sec (MHz) (dB) (µH) (mOhm) (µH) (mOhm) max (mA)
WB1-1LS_ WB1-1L 1 :1 0.150 – 500 0.70 27 75 27 75 —
WB1-6LS_ WB1-6L 1 :1 0.100 – 350 0.50 25 100 25 100 —
WB1.18-3LS_ WB1.18-3L 1 :1.18 0.040 – 300 0.50 90 300 108 330 —
WB1.5-6LS_ WB1.5-6L 1 :1.5 0.050 – 325 0.26 56 120 84 150 —
WB2-1-2WLS_ WB2-1-2WL 1 :2 0.080 – 700 1.00 38 100 75 150 —
WB2.5-6LS_ WB2.5-6L 1 :2.5 0.080 – 225 0.26 30 100 75 130 —
WB4-6LS_ WB4-6L 1 :4 0.100 – 125 0.50 25 100 100 200 —
WB9-1LS_ WB9-1L 1 :9 0.125 – 125 0.57 25 100 225 250 —
WB16-1LS_ WB16-1L 1 :16 0.050 – 100 0.60 56 75 896 330 —
WB36-1LS_ WB36-1L 1 :36 0.100 – 45 0.50 25 50 900 180 —
WB1-1TLS_ WB1-1TL 1 :1 0.100 – 375 0.51 25 100 25 100 30
WB1-6TLS_ WB1-6TL 1 :1 0.050 – 200 0.20 70 150 70 150 18
WB2-1TLS_ WB2-1TL 1 :2 0.070 – 400 1.00 38 100 75 150 29
WB2.5-6TLS_ WB2.5-6TL 1 :2.5 0.050 – 125 0.28 56 120 140 200 13
WB3-1TLS_ WB3-1TL 1 :3 0.040 – 500 0.40 96 110 270 200 4.0
WB4-1HLS_ WB4-1HL 1 :4 0.100 – 500 0.50 25 120 100 160 15
WB4-6TLS_ WB4-6TL 1 :4 0.050 – 200 0.50 43 120 172 160 5.0
WB5-1TLS_ WB5-1TL 1 :5 0.050 – 400 0.30 48 220 240 500 13
WB8-1TLS_ WB8-1TL 1 :8 0.150 – 400 0.76 18 100 144 270 17
WB13-1TLS_ WB13-1TL 1 :13 0.150 – 125 0.72 17 90 221 200 10
WB16-6TLS_ WB16-6TL 1 :16 0.050 – 100 0.60 56 75 896 330 25
WBT1-6LS_ WBT1-6L 1 :1 0.040 – 200 0.25 70 150 70 150 19
WBT1.5-1LS_ WBT1.5-1L 1 :1.5 0.040 – 350 0.30 60 150 90 180 19
WBT2.5-6LS_ WBT2.5-6L 1 :2.5 0.050 – 100 0.26 70 150 175 200 11
WBT4-1LS_ WBT4-1L 1 :3 0.040 – 150 0.26 45 120 135 160 13
WBT4-1ALS_ WBT4-1AL 1 :4 0.040 – 350 0.40 96 110 384 220 3.5
WBT16-1LS_ WBT16-1L 1 :16 0.100 – 100 0.50 25 100 400 300 7.5
WBT25-1LS_ WBT25-1L 1 :25 0.100 – 65 0.50 25 100 625 350 6.0
© Coilcraft, Inc. 2006
Wideband Transformers
Dimensions – surface mount parts Dimensions – through hole parts
Document 425-2
Specifications subject to change without notice. Document 425-2 Revised 12/29/05
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
Board Layout
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 0.025
0,64
0.225
5,72
0.03
0,76
0.06
1,52
0.520
13,2
0.40
10,2
0.10
2,5
0.10
2,5
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
Terminations: Tin over nickel over copper
Tape and reel: 500/13″ reel 24 mm tape width
For packaging data see Tape and Reel Specifications section.
Terminations: Tin over nickel over copper
Packaged 54 per tube.
© Coilcraft, Inc. 2006
Document 425-3
Specifications subject to change without notice. Document 425-3 Revised 11/03/05
Transformers with no center taps
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB1-6
3 dB bandwidth: 0.100 – 350 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
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 1000
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 1000
Attenuation (dB)
Frequency (MHz)
WB4-6
3 dB bandwidth: 0.100 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB9-1
3 dB bandwidth: 0.125 – 125 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB36-1
3 dB bandwidth: 0.100 – 45 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
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 1000
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 1000
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: 0.150 – 100 MHz
© Coilcraft, Inc. 2006
Transformers with secondary center tap
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB1-1T
3 dB bandwidth: 0.100 – 375 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB2-1T
3 dB bandwidth: 0.070 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB1-6T
3 dB bandwidth: 0.050 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
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 1000
Attenuation (dB)
Frequency (MHz)
WB4-1H
3 dB bandwidth: 0.100 – 500 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB4-6T
3 dB bandwidth: 0.050 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB13-1T
3 dB bandwidth: 0.150 – 125 MHz
Document 425-4
Specifications subject to change without notice. Document 425-4 Revised 11/03/05
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB3-1T
3 dB bandwidth: 0.040 – 500 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB5-1T
3 dB bandwidth: 0.050 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB8-1T
3 dB bandwidth: 0.150 – 400 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB16-6T
3 dB bandwidth: 0.050 – 100 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WB16-6T
3 dB bandwidth: 0.050 – 100 MHz
© Coilcraft, Inc. 2006
Transformers with primary and secondary center taps
0
1
2
3
4
5
10.10.01 10 100 1000
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 1000
Attenuation (dB)
Frequency (MHz)
WBT4-1
3 dB bandwidth: 0.050 – 150 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WBT16-1
3 dB bandwidth: 0.100 – 100 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WBT25-1
3 dB bandwidth: 0.100 – 65 MHz
Document 425-5
Specifications subject to change without notice. Document 425-5 Revised 11/03/05
0
1
2
3
4
5
10.10.01 10 100 1000
Attenuation (dB)
Frequency (MHz)
WBT1-6
3 dB bandwidth: 0.040 – 200 MHz
0
1
2
3
4
5
10.10.01 10 100 1000
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 1000
Attenuation (dB)
Frequency (MHz)
WBT4-1A
3 dB bandwidth: 0.040 – 350 MHz
