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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

WB Surface Mount

Wideband RF Transformers

RoHS compliant
  • (For a smaller package size see WBC Series)
  • Also available in a through hole 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
  • Custom versions available
Buy Now:
Count Unit price
1 $2.74
250 $2.27
500 $1.89
1000 $1.59
2500 $1.33
5000 $1.11

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:

Specifications

Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.

No taps

Part number 1 L min per winding (µH) 2 DCR max (mΩ) 3 Imp. ratio
pri:sec 4
Current
rating (mA)
Insertion
loss (db)
Bandwidth (MHz) Schematic
Pri Sec Pri Sec
WB1.18-3SL_ 90 108 300 330 1 : 1.18 250 0.5 0.04 300 A
WB1.5-6SL_ 56 84 120 150 1 : 1.5 250 0.26 0.05 325 A
WB1-1SL_ 27 27 75.0 75.0 1 : 1 250 0.7 0.15 500 A
WB16-1SL_ 56 896 75.0 330 1 : 16 250 0.6 0.05 100 A
WB1-6SL_ 25 25 100 100 1 : 1 250 0.5 0.1 350 A
WB2.5-6SL_ 30 75 100 130 1 : 2.5 250 0.26 0.08 225 A
WB2-1-2WSL_ 38 75 100 150 1 : 2 250 1 0.08 700 A
WB36-1SL_ 25 900 50.0 180 1 : 36 250 0.5 0.1 45 A
WB4-6SL_ 25 100 100 200 1 : 4 250 0.5 0.1 125 A
WB9-1SL_ 25 225 100 250 1 : 9 250 0.57 0.125 125 A

Secondary tap

Part number 1 L min per winding (µH) 2 DCR max (mΩ) 3 Imp. ratio
pri:sec 4
Current
rating (mA)
Insertion
loss (db)
DC imbalance 5 Bandwidth (MHz) Schematic
Pri Sec Pri Sec
WB1-1TSL_ 25 25 100 100 1 : 1 250 0.51 30.0 0.1 375 B
WB13-1TSL_ 17 221 90.0 200 1 : 13 250 0.72 10.0 0.15 125 B
WB16-6TSL_ 56 896 75.0 330 1 : 16 250 0.6 25.0 0.05 100 B
WB1-6TSL_ 70 70 150 150 1 : 1 250 0.2 18.0 0.05 200 B
WB2.5-6TSL_ 56 140 120 200 1 : 2.5 250 0.28 13.0 0.05 125 B
WB2-1TSL_ 38 75 100 150 1 : 2 250 1 29.0 0.07 400 B
WB3-1TSL_ 96 270 110 200 1 : 3 250 0.4 4.0 0.04 500 B
WB4-1HSL_ 25 100 120 160 1 : 4 250 0.5 15.0 0.1 500 B
WB4-6TSL_ 43 172 120 160 1 : 4 250 0.5 5.0 0.05 200 B
WB5-1TSL_ 48 240 220 500 1 : 5 250 0.3 13.0 0.05 400 B
WB8-1TSL_ 18 144 100 270 1 : 8 250 0.76 17.0 0.15 400 B

Primary and secondary taps

Part number 1 L min per winding (µH) 2 DCR max (mΩ) 3 Imp. ratio
pri:sec 4
Current
rating (mA)
Insertion
loss (db)
DC imbalance 5 Bandwidth (MHz) Schematic
Pri Sec Pri Sec
WBT1.5-1SL_ 48 70 150 180 1 : 1.5 250 0.3 19.0 0.04 350 C
WBT16-1SL_ 25 400 100 300 1 : 16 250 0.5 7.5 0.1 100 C
WBT1-6SL_ 70 70 150 150 1 : 1 250 0.25 19.0 0.04 200 C
WBT2.5-6SL_ 70 175 150 200 1 : 2.5 250 0.26 11.0 0.05 100 C
WBT25-1SL_ 25 625 100 350 1 : 25 250 0.5 6.0 0.1 65 C
WBT4-1ASL_ 96 384 110 220 1 : 4 250 0.4 3.5 0.04 350 C
WBT4-1SL_ 45 135 120 160 1 : 4 250 0.26 13.0 0.04 150 C
Notes
  1. When ordering, please specify a packaging code: e.g. WB25-1SLD
  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. Impedance ratio is for the full primary winding to the full secondary winding.
  5. 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.

Termination:

  • RoHS-compliant. 260°C compatible. Matte tin over nickel over phos bronze terminations.
  • COTS Plus tin-silver-copper and tin-lead terminations available.

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.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C
Tape and reel or tube packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
60 per billion hours / 16,666,667 hours, calculated per Telcordia SR-332

Performance curves

Frequency Response

Schematics

A (No Tap) B (Sec Tap) C (Pri and Sec Tap)
wb_schema.gif wb_schemb.gif wb_schemc.gif

Physical characteristics

wb_smtd.gif
dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_u.gif
500 330 100 13 30,4 24,4 24 20 4 2 6,6 0,42

General specification

Core Material:
Ferrite
Weight:
0.38 – 0.40 g
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

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More Info

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