Site Settings

Language settings
Currency settings
Video Library
Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

GA3372-AL Flyback Transformer

RoHS compliant
  • Referenced by Texas Instruments on application notes AN-1724 and AN-1725
  • Designed for 13 Watt applications
  • Operates in continuous conduction mode at 250 kHz with 36 – 72 V input voltage
Buy Now:
Count Unit price
1 $2.71
175 $2.52
700 $2.20
1400 $1.71
2800 $1.46
5000 $1.34

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

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

Typical Application

Works with Texas Instruments LM5015

Input Voltage Output 1 Power Fsw
Sec Aux
36 V 72 V 5 V , 2.6 A 10 V , 0.02 A 13 W 250 kHz


Electrical specifications at 25°C.

Part number 2
(Hover for schematics)
at 0A (µH) 3
(Tolerance: ±10%)
min at   1.2 A (µH)
DCR max (Ω) 4 Leakage
max (µH) 5
Turns Ratio 6 Isolation
Voltage (Vrms) 7
Pri Sec Aux Pri : Sec : Aux
GA3372-AL_ 102.0 91.8 0.185 0.018 0.270 0.780 1 : 0.25 : 0.5 1500
  1. Output of the secondary is with the windings connected in parallel. Auxiliary winding output is 10 V, 20 mA.
  2. When ordering, please specify packaging code: GA3372-ALD.
  3. Inductance measured at 250 kHz, 0.7 Vrms, 0 Adc.
  4. DCR for the secondary is with windings connected in parallel.
  5. Leakage inductance is for the primary and is measured with the secondary shorted.
  6. Turns ratio is with the secondary windings connected in parallel.
  7. 1500 Vrms, one minute isolation from primary and auxiliary 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 +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):



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-(4).gif
175 330 100 13 38,4 32,4 32 28 4 2 12,93 0,5

General specification

Core Material:
6.0 g
175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 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:
Only pure water or alcohol recommended.