WA8351-AL Ultrasonic Sensing Transformer | Coilcraft
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WA8351-AL Ultrasonic
Sensing Transformer

  • Compact, low-profile package (8.2 × 6.6 × 5.4 mm)
    reduces board space by up to 20%
    and is 24% shorter than competitive options
  • Optimized for the Texas Instruments PGA460-Q1
  • Ideal for a variety of available ultrasonic transducers
  • Excellent temperature stability up to 125°C
  • High performance for ultrasonic time-of-flight (TOF) sensing
  • 200 Vrms, 1 minute interwinding isolation (hipot)
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • Ideal for automotive ADAS and industrial applications such as liquid level sensing, flow sensing, or fluid identification
  • RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze.


Part number
Click to get parts
Inductance 1
±10% (mH)
DCR max (Ohms)2 Turns ratio3 Leakage
max (µH)4
W1 : W2 : W3 W1 : W2 : W3
WA8351-AL_ 3.0 0.74 : 0.74 : 7.56 1 : 1 : 8.4 25.2 200
1 Inductance is tested between pins 4 and 6 at 100 kHz, 1.0 Vrms, 0 Adc.
2 Ipk is peak primary current drawn at minimum input voltage.
3 DCR is with the primary windings connected in series and the secondary windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Leakage inductance is measured between pins 4 and 6 with all other pins shorted.
5 Isolation (hipot) is tested between pins 1 and 4 for one minute.
6 Ambient temperature range: −40°C to +125°C
7 Storage temperature range: Packaging tray: −40°C to +80°C
8 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.
9 Electrical specifications at 25°C.
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: April 16, 2019