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GA3291-AL Forward Converter Transformer

for Akros AS1130 PoE Controller

RoHS compliant
  • Developed for Akros Silicon AS1130, 30 W PoE Controller
  • Designed for forward topology operating at 350 kHz
  • Input filter inductor: DO1608C-103
  • Output filter inductor: MSS1278-683
Buy Now:
Count Unit price
1 $3.25
175 $2.89
700 $2.40
1400 $2.02
2800 $1.81
5000 $1.66

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

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Akros Silicon AS1130

Input Voltage Output Power Fsw
Sec Aux
36 V 57 V 12 V , 2.5 A 16 V , 0.02 A 30 W 300 kHz


Electrical specifications at 25°C.

Part number 1
(Hover for schematics)
at 0A (µH) 2
(Tolerance: ±25%)
DCR max (Ω) 3 Leakage
max (µH) 4
Turns Ratio 5 Isolation
Voltage (Vrms) 6
Pri Sec Pri : Sec
GA3291-AL_ 203 0.065 0.031 0.215 1 : 0.923 1500
  1. When ordering, please specify a packaging code: GA3291-ALD. 
  2. Inductance is measured at 300 kHz, 0.6 Vrms, 0 Adc.
  3. DCR for the primary is measured from pin 1 to pin 3.
  4. Leakage inductance is for the primary (pin 1 to pin 3) and is measured with the secondary shorted.
  5. Turns ratio is based on the entire the primary winding (pin 1 to pin 3).
  6. 1500 Vrms isolation from primary to secondary.


  • RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.


  • D = 13" machine-ready reel
    EIA 481 embossed plastic tape (175 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 +125°C
Storage temperature range:
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):



Primary is pin 1 to pin 3.
Terminal 2 is for internal connection only.
Do not connect terminal 2 to ground or any circuitry.

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-(3).gif
175 330 100 13 50,4 44,4 44 28 4 2 11,9 0,4

General specification

Core Material:
10.7 g
175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 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. See Doc787_PCB_Washing.pdf.