Coilcraft MA5157 Flyback Transformer for NXP Semiconductor SSL2103 SMPS Controller
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Flyback Transformer for
NXP Semiconductor SSL2103

  • Developed for use with NXP Semiconductor SSL2103 SMPS Controller for dimmable LED lighting
  • Designed to operate at 100 kHz with 120 Vac input
  • 2000 Vrms, one minute isolation from primary and auxiliary to secondary windings
  • 23 V, 0.74 A output; 19 V, 20 mA aux winding output
  • RoHS-compliant. Tin-silver over tin over copper over steel terminations


Part number
Click to get parts
at 0A1
±10% (µH)
at Ipk2
min (µH)
DCR max3
max (µH)
Turns ratio Ipk2
pri : sec pri : aux
MA5157-AL 750 635 0.880 (pri)
0.095 (sec)
0.585 (aux)
20.5 1 : 0.23 1 : 0.20 1.2 23 V, 0.74 A
1 Inductance is for the primary, measured at 100 kHz, 0.1 Vrms.
2 Ipk: Peak primary current drawn at minimum input voltage.
3 DCR for the primary is measured with the windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Leakage inductance is for the primary winding, measured at 100 kHz, 0.1 Vrms with the secondary winding shorted.
5 Output is for the secondary winding. Bias winding output is 12 V, 20 mA.
6 Ambient temperature range: −40°C to +85°C
7 Storage temperature range: Component: −40°C to +125°C
Packaging tray: −40°C to +80°C
8 Maximum part temperature: +125°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.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: April 16, 2018