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ZA9668-AE and ZB1175-AE Isolated Buck Transformers

RoHS compliant halogen free AEC-Q flag
  • Optimized for STMicroelectronics 38V/5W automotive Iso-Buck converter A6986I and L6986I
  • Suitable for automotive isolated IGBT/SiC gate driver, On-board charger for HEV/EV, Electric Traction Systems, and similar applications
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • 3300 Vrms, one minute isolation (hipot) from primary to secondary

Buy Now:
Count Unit price
1 $9.35
100 $8.18
250 $6.13
500 $3.68
1000 $2.87
2500 $2.46
5000 $2.25

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

. in stock, ready to ship today.
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Typical Application

Works with STMicroelectronics A6986I and L6986I

Part number Input Voltage Output Power Fsw
ZA9668-AE_ 5 V 29 V , 0.2 A 5.8 W 500 kHz
ZB1175-AE_ 5 V 8 V , 0.2 A 1.6 W 500 kHz


Electrical specifications at 25°C.

Part number
(Hover for schematics)
at 0A (µH) 1
(Tolerance: ±10%)
Isat (A) 2 DCR max (Ω) Leakage
max (µH) 3
Turns Ratio Isolation
Voltage (Vrms) 4
Pri Sec Pri : Sec
ZA9668-AE_ 18 3.5 0.075 1.490 0.24 1 : 5.8 3300
ZB1175-AE_ 18 2.6 0.053 0.160 0.18 1 : 1.6 3300
  1. Inductance is for the primary, measured on at 500 kHz, 0.2 Vrms, 0 Adc.
  2. Isat: DC current that causes an inductance drop of 30% (typ) from its value without current.
  3. Leakage Inductance is for the primary, measured with secondary windings shorted together.
  4. 3300 Vrms, one minute isolation (hipot) from primary to secondary.


  • RoHS tin-silver-copper (95.5/3.8/0.7) over tin over nickel over phos bronze.


  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (250 parts per 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 +125°C
Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+155°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves





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
250 330 100 13 38,4 32,4 32 20 4 2 11,2 0,5

General specification

Core Material:
4.12 g
250 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 20 mm pocket spacing, 11.2 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.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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