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. 2013
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.
Forward-Mode Transformers
Document 574 -1
Document 574-1 Revised 10/28/08
1. When ordering, please specify termination and packaging codes:
FCT1-240D3SLD
Termination: L = RoHS tin-silver over tin over nickel over phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5)
or S = non-RoHS tin-lead (63/37).
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (175 parts per full reel).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
2. Inductance is measured at 250 kHz, 0.2 Vrms, 0 Adc.
3. DCR for the primary and secondary is with the windings connected in
parallel.
4. Leakage inductance is for the primary windings with the secondary
windings shorted.
5. Turns ratio is with the primary windings and the secondary windings
connected in parallel.
6. These inductors are recommended for 30% ripple current. Ripple less
than 30% may require the use of physically larger inductors. Allowing
higher ripple current to make use of smaller inductors may create a risk
of discontinuous output current.
7. Operating temperature range –40°C to +125°C.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Leakage Recommended
Part
Inductance2 DCR max (mOhms)3 inductance4 Turns ratio5
output
number1 min (µH) pri sec bias sync max (µH) pri : sec pri : bias pri : sync Output inductor6
FCT1-33D3SL_ 72.9 27.5 5.0 250 160 0.425 1 : 0.33 1 : 1 1 : 0.56 3.3 V, 9 A SER2013-472
FCT1-50D3SL_ 72.9 27.5 10.0 250 160 0.420 1 : 0.44 1 : 1 1 : 0.56 5 V, 6 A SER1360-103
FCT1-120D3SL_ 72.9 27.5 28.5 250 160 0.175 1 : 1 1 : 1 1 : 0.56 12 V, 2.5 A MSS1278-563
FCT1-195D3SL_ 72.9 27.5 32.0 235 120 0.235 1 : 1.44 1 : 0.88 1 : 0.44 19.5 V, 1.55 A MSS1278-154
FCT1-240D3SL_ 72.9 27.5 72.5 235 120 0.235 1 : 1.78 1 : 0.88 1 : 0.44 24 V, 1.25 A MSS1278-224
2
4
9
8
7
10
11
12
Bias Sync
Pri Sec
Output
inductor
5
6
1
3
The primary windings and the
secondary windings are to be
connected in parallel on the
PC board.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 10.1 – 10.7 g
Ambient temperature –40°C to +125°C
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)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick,
32 mm pocket spacing, 12.0 mm pocket depth
PCB washing Only pure water or alcohol recommended
• Designedtomeet30WPoEIEEE802.3at-2009standard.
• Operatesat250kHzwith36
– 7
2 Volts input.
• 1500Vrmsisolation,primaryandbiastothesecondary
• Biaswindingoutput:12V;syncwindingoutput:5V
For 30 Watt
Telecommunications
Forward-Mode Transformers – 30 Watts
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. 2013
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.
Document 574-2
0.930
23,62
0.130
3,30 0.050
1,27
0.118
3,0
1
0.450
11,43
1.181
30,00
0.827
21,0
0.810
20,57
0.969
24,6
0.084
2,13
0.028
0,72
0.118
3,0
max
max
max
1
1
12
12
6
6
7
7
Recommended
Land Pattern
0.004 /0,10
Dot indicates pin 1
FCT1-xxD3SL
Dimensions are in inches
mm
Document 574-2 Revised 10/28/08
