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ZA9709 and WA8427 Push-Pull Transformer

for Texas Instruments SN6505B Push Pull Driver

RoHS compliant halogen free AEC-Q flag
Coilcraft's ZA9709 and WA8427 miniature, low-profile transformer is designed for use with SN6505B transformer drivers from Texas Instruments. The center-tapped push-pull transformer features high isolation voltage and high efficiency for isolated power supplies. It is driven by the SN6505B from a 3.3 V power supply and provides high isolation at 2500 Vrms across the isolation barrier for interfaces such as CAN, RS-485, RS-422, RS-232, SPI, I2C , and low-power LAN in industrial and automotive applications. The ZA9709 and WA8427 are AEC Grade 1 qualified, making it an ideal solution for DC-DC converters in EV/HEV applications.
  • Designed for use with SN6505B Push Pull Driver by Texas Instruments
  • Low profile and center-tapped push-pull transformers for isolated power supply
  • 2500 Vrms, one minute high isolation (hipot) winding to winding
  • AEC-Q200 Grade 1 (–40°C to +125°C)

Buy Now:
Count Unit price
1 $4.34
100 $3.47
250 $2.82
500 $2.35
900 $1.98
2700 $1.69
5400 $1.47

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

. in stock, ready to ship today.
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Typical Application

Works with Texas Instruments SN6505B

Part number Input Voltage Output Power Fsw
ZA9709-AED 2.25 V 5.5 V 3.3 V , 1 A 3.3 W 100 kHz
WA8427-AED 2.2 V 5.5 V 5 V , 1 A 5 W 100 kHz


Electrical specifications at 25°C.

Part number
(Hover for schematics)
at 0A (µH) 1
DCR max (Ω) Leakage
max (µH) 2
Turns Ratio Volt-time
product (V-µs) 3
Voltage (Vrms) 4
Pri Sec Pri : Sec
ZA9709-AED 145 0.076 0.128 0.25 1 : 1.67 8.64 2500
WA8427-AED 145 0.076 0.100 0.25 1 : 1.11 8.64 2500
  1. Inductance is for the primary, measured at 100 kHz, 0.01 Vrms, 0 Adc.
  2. Leakage inductance is measured between pins 1 and 3 at 100 kHz, 0.1 Vrms with secondary pins shorted.
  3. Volt-time product is for primary windings, between pin 1 and 3.
  4. 2500 Vrms, one minute isolation (hipot) between primary and secondary windings.


  • RoHS-compliant. 260°C compatible. RoHS tin-silver-copper over tin over nickel over phos bronze. Other terminations available at additional cost.


  • D = 13″ machine ready reel. EIA-481 embossed plastic tape. (900 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 + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):




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
900 330 100 13 30,4 24,4 24 16 4 2 4,6 0,4

General specification

Core Material:
0.60 – 0.65 g
900 per reel, 13″ reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 4.6 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.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.