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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

WBC Series

SMT Mini Wideband Transformers

RoHS compliant AEC-Q flag
  • Tapped or untapped configurations
  • 250 mA max current rating
  • 300 Vrms interwinding isolation
  • 1/4 Watt RF input power rating
  • Custom versions available
  • Typical applications are as impedance or isolation transformer
  • Can also be used for balanced to unbalanced (balun) conversion
  • AEC-Q200 Grade 3 (−40°C to +85°C)
  • Samples of all values are available in Coilcraft Designer's Kit C393
Buy Now:
Count Unit price
1 $2.74
375 $2.19
750 $1.90
1500 $1.48
3000 $1.27
6000 $1.16

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

. in stock, ready to ship today.
Request a Sample:
Designer's Kit:
Kit Values Price
C393 12 (3 of each) $45.00

Specifications

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

Part number 1 L per winding (µH) 2 Test frequency
(kHz)
DCR max (mΩ) 3 Imp. ratio
pri:sec 4
Current
rating (mA)
Insertion
loss (db)
DC imbalance 5 Bandwidth (MHz) Schematic Color dot
Pri Sec Pri Sec
WBC1-1L_ 10 10 100 120 120 1 : 1 250 0.4 - 0.4 600 A Brown
WBC1-1TL_ 9.5 9.5 100 75.0 75.0 1 : 1 250 0.58 36.0 0.25 750 B Brown
WBC16-1TL_ 5.0 80 100 80.0 230 1 : 16 250 0.8 5.0 0.6 300 B Violet
WBC2-1TL_ 10 20 100 120 150 1 : 2 250 0.5 8.5 0.2 500 B Red
WBC3-1TL_ 9.0 27 100 100 150 1 : 3 250 0.6 8.5 0.3 900 B Orange
WBC4-14L_ 2.0 8.0 100 50.0 100 1 : 4 250 2 15.0 1.5 1200 B Green
WBC4-1TL_ 9.0 36 100 55.0 120 1 : 4 250 1 30.0 0.25 750 B Yellow
WBC4-1WL_ 5.0 20 100 80.0 120 1 : 4 250 0.9 10.0 0.5 1000 B White
WBC4-4L_ 9.0 36 100 60.0 120 1 : 4 250 1 30.0 0.25 800 C Yellow
WBC4-6TL_ 9.0 36 100 80.0 200 1 : 4 250 0.65 7.5 0.3 700 B Blue
WBC8-1L_ 22 176 100 120 310 1 : 8 250 0.6 17.0 0.15 600 D Gray
WBC9-1L_ 9.0 81 100 80.0 230 1 : 9 250 0.54 5.0 0.3 500 B White
Notes
  1. When ordering, please specify termination and packaging codes: e.g. WBC16-1TLC
  2. Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/ HP 4192 or equivalent.
  3. DCR measured at 25°C on a micro-ohmmeter. DCR measured 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 maximum difference in current measured at pins 1 and 3 with the source at pin 2. Inductance drop is 15% at maximum imbalance.

Termination:

  • L = RoHS compliant tin-silver-copper (95.5/4/0.5) over silver-platinum-glass frit.
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)

Packaging:

  • C = 7" machine-ready reel
    EIA-481 embossed plastic tape (750 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 C instead.
  • D = 13" reel, machine-ready 
    EIA-481 embossed plastic tape. Factory order only, not stocked (2500 parts per full reel).
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C
Tape and reel 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

Imbalance Curve

Schematics

A B C D
wbcs.gif

Physical characteristics

wbcd.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T part_or_f.gif
750 2500* 178/330 60/100 13 18,4 12,4 12 8 4 2 2,9 0,3
* Special order

General specification

Core Material:
Ferrite
Weight:
68.0 – 88.8 mg
Packaging:
750/7″reel; 2500/13″ reel Plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing, 2.9 mm pocket depth

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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