Coilcraft WA8582-AL Isolation Transformer
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Isolation Transformer

  • Designed specifically for automotive active cell balance battery management system.
  • Suitable for power driver ICs, low power isolation, gate drive and other power applications.
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • 1500 Vrms, one minute primary to secondary isolation (hipot); 500 Vrms winding to core isolation.
  • RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations.


Part number1
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Pri / sec       
±25% (µH)
DCR max (Ohms)3 Volt-time
Turns ratio
pri : sec
pri sec
WA8582-AL_ 5.0 V to 5.0 V 136.8 0.310 0.475 22.7 2.0 1 : 1.33
1 When ordering, please specify termination and packaging codes: e.g. WA8582-ALD
  Termination: L = RoHS compliant tin-silver over tin over nickel over phos bronze
Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37).
  Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (600 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.
2 Inductance is for the primary, measured from pins 1 to 2 at 250 kHz, 0.1 Vrms, 0 Adc.
3 DCR is for each winding of the primary and secondaryat 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Volt-time product is based on 2200 Gauss and the number of turns on winding 1–2.
5 Calculated output power based on 250 kHz operating frequency. Power varies depending on application.
6 Ambient temperature range: −40°C to +125°C
7 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
8 Maximum part temperature +165°C (ambient + temp rise)
9 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.
10 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.

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Updated: April 16, 2018