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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

KA5038-BL Flyback Transformer

for ON Semi NCP1236

RoHS compliant AEC-Q flag
  • Developed for ON Semiconductor NCP1236 Fixed Frequency PWM Controller
    and NCP4305FBDAP 65W Off-Line AC/DC Adapter
  • Universal input; 66 Watt output
  • Copper shield minimizes EMI radiation
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Count Unit price
1 $15.91
120 $13.63
240 $11.85
500 $10.31
1000 $8.02
2500 $6.87
5000 $6.30

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
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Typical Application

Works with ON Semiconductor NCP1236

AC Input Voltage Output 1 Power Fsw
Sec Aux
85 V 265 V 19 V , 3.5 A 15.5 V , 0.02 A 66 W 50 kHz


Electrical specifications at 25°C.

Part number
(Hover for schematics)
at 0A (µH) 2
(Tolerance: ±10%)
min at   2.8 A (µH)
DCR max (Ω) 3 Leakage
max (µH) 4
Turns Ratio 5 Isolation
Voltage (Vrms) 6
Pri Sec Aux Pri : Sec : Aux
KA5038-BL 560 480 0.198 0.007 0.236 5.6 1 : 0.188 : 0.156 3000
  1. Output is for the secondary. Aux winding output is 15.5 V, 20 mA.
  2. Inductance measured at 50 kHz, 0.1 Vrms, 0 Adc
  3. DCR is with the primary windings connected in series and the secondary windings connected in parallel.
  4. Leakage inductance is for both windings of the primary and is measured with the secondary windings shorted.
  5. Turns ratios are with the primary windings connected in series and the secondary windings connected in parallel.
  6. One minute primary to secondary.


  • RoHS-compliant. 260°C compatible. Tin-silver over tin over copper over steel. Other terminations available at additional cost.
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: −40°C to +125°C
Packaging tray: −40°C to +80°C
Maximum part temperature:
+125°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):



Primary windings to be connected
in series and secondary windings
to be connected in parallel on PC board.

Physical characteristics



General specification

Core Material:
60.2 g