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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). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.
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.