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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 Through Hole

Wideband RF Transformers

RoHS compliant
  • 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
  • Custom versions available
Buy Now:
Count Unit price
1 $2.78
250 $2.31
500 $1.92
1000 $1.61
2500 $1.35
5000 $1.12

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

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Specifications

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

No taps

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

Secondary tap

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

Primary and secondary taps

Part number L min per winding (µH) 1 DCR max (mΩ) 2 Imp. ratio
pri:sec 3
Current
rating (mA)
Insertion
loss (db)
DC imbalance 4 Bandwidth (MHz) Schematic
Pri Sec Pri Sec
WBT1.5-1L 48 70 150 180 1 : 1.5 250 0.3 19.0 0.04 350 C
WBT16-1L 25 400 100 300 1 : 16 250 0.5 7.5 0.1 100 C
WBT1-6L 70 70 150 150 1 : 1 250 0.25 19.0 0.04 200 C
WBT2.5-6L 70 175 150 200 1 : 2.5 250 0.26 11.0 0.05 100 C
WBT25-1L 25 625 100 350 1 : 25 250 0.5 6.0 0.1 65 C
WBT4-1AL 96 384 110 220 1 : 4 250 0.4 3.5 0.04 350 C
WBT4-1L 45 135 120 160 1 : 4 250 0.26 13.0 0.04 150 C
Notes
  1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4192 or equivalent.
  2. DCR measured on a micro-ohmmeter at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  3. Impedance ratio is for the full primary winding to the full secondary winding.
  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.

Termination:

  • RoHS-compliant. Matte tin over nickel over phos bronze terminations.
  • COTS Plus tin-silver-copper and tin-lead terminations available.
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_thd.gif

General specification

Core Material:
Ferrite
Weight:
0.38 – 0.40 g
Packaging:
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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