Document 1594-1

No-opto Flyback Transformers
HalogenFree• Discontinuous conduction mode Flyback transformers• Optimized for 125 – 150 kHz with 8 – 28 V or 18 – 60 V input• 1500 Vrms, one minute isolation between primary and secondary

AEC

Q200 +85°C

Core material Ferrite
Terminations RoHS tin-silver-copper over tin over nickel over phosbronze. Other terminations available at additional cost.
Weight 2.65 – 2.75 g
Ambient temperature –40°C to +85°C
Max Part Temperature +125°C (ambient + temperature rise)
Storage temperature Component: –40°C to +125°C
Tape and reel 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)
PCB washing Tested to MIL-STD-202 Method 215 plus an additionalaqueous wash. See Doc787_PCB_Washing.pdf.		
Inductance			DCR max (Ohms)
Part	  at 0 A2
Isat3
number1±10% (µH)(A)
pri    sec

Leakageinductancemax (µH)4Turns ratio
pri : sec

Isolation5 Power(Vrms)(W)

Output

8 – 28 V inputt
YA9123-BED
YA9124-BED
YA9125-BED

888

5.9
5.9
5.9

0.025
0.025
0.025

0.024
0.125
0.306

0.124
0.124
0.100

1 : 0.751
1 : 1.625
1 : 3.125

1500
1500
1500

6665 V, 1.2 A
12 V, 0.5 A
24 V, 0.25 A

18 – 60 V inputt
YA9126-BED
YA9127-BED
YA9128-BED

404040

2.3
2.3
2.3

0.095
0.095
0.095

0.020
0.090
0.260

0.460
0.353
0.350

1 : 0.313
1 : 0.750
1 : 1.375

1500
1500
1500

6665 V, 1.2 A
12 V, 0.5 A
24 V, 0.25 A

1. Packaging:D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (350 parts per full reel). Quantities less than full
reel available: in tape (not machine ready) or withleader and trailer ($25 charge).
2. Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
3. DC current that causes the primary inductance drop 30% from its value
without current. Click for temperature derating information.
4. Leakage Inductance is for the primary, measured with secondary
windings shorted together.
5. 1500 Vrms, one minute isolation (hipot) between windings.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Schematics
YA9124, YA9125,
YA9127, YA9128

YA9123, YA9126*Connect pin 1 to 2 andpin 3 to 4 on the PC board*Connect pin 1 to 2, 3 to 4,
5 to 6, and pin 7 to 8 on thePC board

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1594-1

Revised 06/14/22© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 1594-2

No-opto Flyback Transformers
L vs Current
Halogen
FreeAEC

Q200 +85°C

Dimensions
Dot indicates pin 1

XXXX Y

0.430
max
10,928

YA9125-BE

10.005
max
0,127

0.394
max
10,045InternalcodePart
number0.370
9,400.05
1,270.520
max
13,210.004 / 0,100.530
13,460.0984
2,500.080
2,03

Recommended
Land Pattern
Dimensions are ininches
mm

Packaging 350/13″ reel Plastic tape: 24 mm wide, 0.50 mm thick,
16 mm pocket spacing, 10.35 mm pocket depth

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1594-2

Revised 06/14/22© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.