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Through Hole Wideband
RF Transformers – WB Series

  • Also available in a surface mount version
  • Available in a variety of impedance ratios
  • Tapped or untapped configurations
  • 250 mA max current rating, 1/4 Watt RF input power rating
  • 500 Vrms, one minute isolation (hipot), primary to secondary
  • RoHS-compliant. Matte tin over nickel over phos bronze terminations
  • COTS Plus tin-silver-copper and tin-lead terminations available
  • Custom versions available

SPECIFICATIONS


Schematic Part number
Click to get parts
Imp. 
ratio1
pri : sec
Bandwidth
(MHz)
Insertion
loss max
(dB)
Pins 6-4 (pri) Pins 1-3 (sec) DC
imb.
max4
(mA)
L min2
(µH)
DCR max3
(mOhms)
L min2
(µH)
DCR max3
(mOhms)
WB1-1L 1 : 1 0.150 - 500 0.70 27 75 27 75
WB1-6L 1 : 1 0.100 - 350 0.50 25 100 25 100
WB1.18-3L 1 : 1.18 0.040 - 300 0.50 90 300 108 330
WB1.5-6L 1 : 1.5 0.050 - 325 0.26 56 120 84 150
WB2-1-2WL 1 : 2 0.080 - 700 1.00 38 100 75 150
WB2.5-6L 1 : 2.5 0.080 - 225 0.26 30 100 75 130
WB4-6L 1 : 4 0.100 - 125 0.50 25 100 100 200
WB9-1L 1 : 9 0.125 - 125 0.57 25 100 225 250
WB16-1L 1 : 16 0.050 - 100 0.60 56 75 896 330
WB36-1L 1 : 36 0.100 - 45 0.50 25 50 900 180
WB1-1TL 1 : 1 0.100 - 375 0.51 25 100 25 100 30
WB1-6TL 1 : 1 0.050 - 200 0.20 70 150 70 150 18
WB2-1TL 1 : 2 0.070 - 400 1.00 38 100 75 150 29
WB2.5-6TL 1 : 2.5 0.050 - 125 0.28 56 120 140 200 13
WB3-1TL 1 : 3 0.040 - 500 0.40 96 110 270 200 4.0
WB4-1HL 1 : 4 0.100 - 500 0.50 25 120 100 160 15
WB4-6TL 1 : 4 0.050 - 200 0.50 43 120 172 160 5.0
WB5-1TL 1 : 5 0.050 - 400 0.30 48 220 240 500 13
WB8-1TL 1 : 8 0.150 - 400 0.76 18 100 144 270 17
WB13-1TL 1 : 13 0.150 - 125 0.72 17 90 221 200 10
WB16-6TL 1 : 16 0.050 - 100 0.60 56 75 896 330 25
WBT1-6L 1 : 1 0.040 - 200 0.25 70 150 70 150 19
WBT1.5-1L 1 : 1.5 0.040 - 350 0.30 48 150 70 180 19
WBT2.5-6L 1 : 2.5 0.050 - 100 0.26 70 150 175 200 11
WBT4-1L 1 : 3 0.040 - 150 0.26 45 120 135 160 13
WBT4-1AL 1 : 4 0.040 - 350 0.40 96 110 384 220 3.5
WBT16-1L 1 : 16 0.100 - 100 0.50 25 100 400 300 7.5
WBT25-1L 1 : 25 0.100 - 65 0.50 25 100 625 350 6.0
1 Impedance ratio is for the full primary winding to the full secondary winding.
2 Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4192 or equivalent.
3 DCR measured on a micro-ohmmeter at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 DC imbalance is the difference in current measured at pins 1 and 3 with the source at pin 2. Inductance drop is 15% at maximum imbalance.
5 Ambient temperature range: −40°C to +85°C
6 Storage temperature range: Component: −40°C to +85°C
Packaging tubes: −40°C to +80°C
7 Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
Refer to Soldering Coilcraft Components before soldering.

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Updated: October 30, 2017