Coilcraft S6057-A Flyback Regulator Transformer
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S6057-AL Surface Mount
Flyback Regulator Transformer

  • For flyback regulator applications using the TI LM258X SIMPLE SWITCHER®
  • Recommended and approved by Texas Instruments
  • Input voltage: 4 – 6 V
  • 500 Vrms isolation between windings
  • RoHS-compliant – 260°C compatible. Tin-silver over tin over copper clad steel.
  • COTS Plus tin-silver-copper and tin-lead terminations available
  • Custom versions available


ref #
Part number
Click for
L at
0 Adc
±15% (µH)
L at
min (µH)
product max
max (µH)
DCR (Ohms)2 Turns
Output Ipk3
Pri Sec
T7 S6057-AL 47 40.0 233.1 2.0 0.065 0.065 1:1 5 V, 0.9 A 3.0
1 Leakage inductance measured across the primary at 0.10 Vrms, 100 kHz.
2 DCR measured at 25°C. For other operating temperatures,
use this DCR at Temperature calculator.
3 DC current at which the primary voltage is measured.
4 Ambient temperature range: −40°C to +85°C
5 Storage temperature range: Component: −40°C to +85°C
Packaging trays: −40°C to +80°C
6 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, 2018