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ZD2087-AE Flyback Transformers

for STMicroelectronics A/L6983I Iso-Buck Converter

RoHS compliant halogen free AEC-Q flag
The ZD2087-AE flyback transformer is designed to work with the A/L6983I, iso-buck converter from STMicroelectronics. It has no auxiliary winding and offers the greatest efficiency, lowest cost, and smallest size for synchronous isolated DC-DC power converters. The ZD2087-AE is optimized with a 24 V input voltage and generates an output at 30 V / 0.33 A.
  • Developed for use with the STMicroelectronics A/L6983I iso-buck converter
  • Optimized for a 24 Vin solution with the evaluation board STEVAL-L6983IV1.
  • 1500 Vrms, one minute isolation (hipot) between primary and secondary.
  • AEC-Q200 (–40°C to +125°C)

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Electrical specifications at 25°C.

Part number
(Hover for schematics)
Power (W) Inductance
at 0A (µH) 1
(Tolerance: ±10%)
Isat (A) 2 DCR max (Ω) Leakage
max (µH) 3
Turns Ratio Isolation
Voltage (Vrms) 4
Output (V, A)
Pri Sec Pri : Sec
ZD2087-AED 9.9 13.5 8.0 0.02 0.293 0.15 1 : 2.555 1500 30 V , 0.33 A
  1. Inductance is for the primary, measured at 500 kHz, 0.1 Vrms, 0 Adc.
  2. DC current that causes the primary inductance to drop 30% from its value without current.
  3. Leakage inductance is for the primary with the secondary windings shorted.
  4. 1500 Vrms, one minute isolation (hipot) between primary and secondary.


  • RoHS-compliant, halogen free. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations.


  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (150 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
RoHS compliant , halogen free
Ambient temperature range:
–40°C to +125°C
Storage temperature range:
Component: –40°C to +165°C
Tape and reel packaging: –40°C to +80°C
Maximum part temperature:
+165°C (Ambient + temp rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves

L vs Current



Physical characteristics



Tape and Reel specification


Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c.gif
150 330 100 13 50,4 44,4 44 28 4 2 14,6 0,5

General specification

Core Material:
6.99 g
150 per 13″ reel Plastic tape: 44 mm wide, 0.5 mm thick, 28 mm pocket spacing, 14.6 mm pocket depth


Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.

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