US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest infor
mation.
Flyback
Transformers
Document 722
Document 722 Revised 01/19/17
1. Inductance is measured at 50 kHz, 0.1 Vrms.
2. Peak primary current drawn at minimum input voltage.
3. DCR for the primary is with the windings connected in parallel.
4. Leakage inductance is for the primary with windings connected in parallel
and with the secondary winding shorted.
Inductance Inductance Leakage
Part at 0 A1 at Ipk2 DCR max (mOhms)3 inductance4 Turns ratio5
Ipk2
number ±10% (µH) min (µH) pri sec max (µH) pri : sec (A)
GA3459-BL 5.0 4.25 7.70 515 0.10 1 : 10 20
GA3460-BL 2.5 2.25 5.63 400 0.06 1 : 10 50
Core material Ferrite
Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 24.2 – 27.5 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Tray packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 24 per tray
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
• Flyback transformer for the Linear Technology LT3751
Capacitor Charger Controller for charging capacitors to 500 V
• GA3459-BL: 5 – 24 V input; GA3460-BL: 12 – 24 V input
• 1500 Vrms, one minute isolation from primary to secondary
windings
• Flux shield minimizes EMI emission
Primary windings to be connected in parallel
on PC board. Connect pin 6 to ground.
Note: The primary windings of these
transformers DO NOT have the same pinouts.
For Linear Technology LT3751
Capacitor Charger Controller
0.551
14,0
1.285
32,65 max
0.004 / 0,10
max
1.053
26,75
1.024
26,0
1
Recommended
Land Pattern
12
GA34xx-BL
XXXX Y
max
12
1
1.10
28,2
0.108
2,75
0.157
4,00 0.157
4,00
0.043
1,09
Dot
indicates
pin 1
Internal
code
0.079
2,00
12
9
1
1
Pri
Pri
Sec
Sec
Flux
shield
Flux
shield
2
2
3
3
4
4
7
7
6
6
11
10
10
11
9
12
GA3459-BL
GA3460-BL
5. Turns ratios are with the primary windings connected in parallel.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Dimensions are in inches
mm
