Coilcraft JA4220-AL Surface Mount Wideband RF Transformer
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JA4220-AL SMT Mini
Wideband RF Transformer

  • Very wide 3 dB bandwidth: 0.1 MHz to 3.5 GHz.
  • 250 mA max current rating, 1/4 Watt RF input power rating
  • RoHS-compliant. 260°C compatible. Tin-silver-copper over silver-platinum-glass frit terminations
  • COTS Plus tin-lead terminations available
  • Custom versions available


Part number1
Click for samples
Imp. ratio
pri : sec
loss max
Pins 1-4 (pri) Pins 2-3 (sec)
L min2
DCR max3
L min2
DCR max3
JA4220-AL_ 1 : 1 0.1 – 3500 0.20 15 120 15 120
1 When ordering, please specify a packaging code: e.g. JA4220-ALC
  Termination: L = RoHS compliant tin-silver-copper over silver-platinum-glass frit.
Special order, added cost: S = non-RoHS tin-lead (63/37).
  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" machine ready reel.
EIA-481 embossed plastic tape. Factory order only, not stocked (3000 parts per full reel).
2 Inductance measured at 1 MHz, 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 Ambient temperature range: −40°C to +85°C
5 Storage temperature range: Component: −40°C to +85°C
Tape and reel packaging: −40°C to +80°C
6 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
7 Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
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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Updated: October 05, 2018