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JA4309 Planar Transformer

for Texas Instruments UCC2897A

RoHS compliant
  • Specially developed for use with the TI UCC2897A Active Clamp  PWM Controller
  • Featured on PMP4804 and PMP5997 Demo Board/Reference Design
  • Low profile, high efficiency planar transformer
Buy Now:
Count Unit price
1 $16.06
200 $14.95
600 $13.01
1200 $10.12
2400 $8.67
5000 $7.96

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 UCC2897A

Output Power
3.3 V , 30 A 100 W


Electrical specifications at 25°C.

Part number 1
(Hover for schematics)
min (µH) 2
DCR max (mΩ) 3 Leakage
max (µH) 4
Turns Ratio Isolation
Voltage (Vrms) 5
Pri Sec1 Aux Pri : Sec1 : Sec2 : Aux
JA4309-AL_ 67.5 20.0 0.50 160 0.35 1 : 0.167 : 0.167 : 0.667 1500
  1. When ordering, please specify a packaging code: JA4309-ALD.
  2. Inductance measured on an Agilent/HP 4284 between pins 2 and 4 at 200 kHz, 0.1 Vrms, 0 Adc.
  3. DCR for the secondary is for each winding.
  4. Leakage inductance measured between pins 2 and 4 at 100 kHz, 0.1 Vrms, 0 Adc with all secondary pins shorted.
  5. Primary to secondary.


  • RoHS-compliant. 260°C compatible. Matte tin over nickel over brass terminations. Other terminations available at additional cost.


  • D = 13" machine-ready reel
    EIA 481 embossed plastic tape (200 parts per full reel).
  • B = Less than full reel
    In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
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_v-(2).gif
200 330 100 13 50,4 44,4 44 32 4 2 9,35 0,37

General specification

Core Material:
11.6 g
200 per 13″ reel Plastic tape: 44 mm wide, 0.37 mm thick, 32 mm pocket spacing, 9.35 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 with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf

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