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XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

GA3271-AL Flyback Transformer

for Maxim MAX5941B PWM Controller

RoHS compliant
  • Developed for Maxim MAX5941B PoE Interface/PWM Controller
  • Designed for 13 W PoE applications
  • RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations

Buy Now:
Count Unit price
1 $3.78
200 $3.24
600 $2.82
1200 $2.20
2400 $1.89
5000 $1.73

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

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

Typical Application

Works with Maxim MAX5941B

Input Voltage Output 1 Power Fsw
Sec Bias
30 V 60 V 12 V , 1 A 15 V , 0.02 A 13 W 275 kHz


Electrical specifications at 25°C.

Part number 2
(Hover for schematics)
at 0A (µH) 3
(Tolerance: ±10%)
min at   1 A (µH)
DCR max (Ω) 4 Leakage
max (µH) 5
Turns Ratio 6 Isolation
Voltage (Vrms) 7
Pri Sec Bias Pri : Sec : Bias
GA3271-AL_ 117.5 104.0 0.201 0.060 0.335 0.815 1 : 0.457 : 0.571 1500
  1. Output of the secondary is with the windings connected in parallel. Bias winding output is 15 V, 20 mA
  2. When ordering, please specify termination and packaging codes: GA3271-ALD.
  3. Inductance is for the primary, measured at 250 kHz, 0.1 Vrms.
  4. DCR for the primary and for the secondary are with the windings connected in parallel.
  5. Leakage inductance is for the primary windings with the secondary windings shorted.
  6. Turns ratios are with the primary the secondary windings connected in parallel.
  7. 1500 Vrms, one minute primary to secondary isolation.


  • L = RoHS tin-silver over tin over nickel over phos bronze.
  • T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • S = non-RoHS tin-lead (63/37). (Special order)


  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (200 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 windings and secondary windings
to be connected in parallel on the PC board.

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-(2).gif
200 330 100 13 50,4 44,4 44 28 4 2 9,6 0,4

General specification

Core Material:
5.5 g
200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 9.6 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 with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf

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