© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
4 W Forward Mode Transformers
Document 715
Document 715
Revised 02/18/09
1. When ordering, please specify a packaging code:
FCT1-50K2SL
D
Packaging: D =13
″ machine ready reel. EIA-481 embossed plastic tape
(350 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 secondary is measured with the windings connected in parallel.
4. Leakage inductance is for the primary and is measured with the secondary shorted.
5. Turns ratio is with the secondary windings connected in parallel.
6. Output is with the secondary windings connected in parallel. Auxiliary winding output is 10 V, 20 mA.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Leakage
Input
Part
Inductance2
DCR max (mOhms)3
inductance4
voltage
Turns ratio5
number1
nom (µH)
pri
sec
aux
max (µH)
range (V)
pri : sec
pri : aux
Output6
FCT1-33K2SL_
120
48
53
720
0.195
9 – 18
1 : 1.0
1 : 2.8
3.3 V, 1.2 A
FCT1-50K2SL_
120
48
88
735
0.205
9 – 18
1 : 1.4
1 : 2.8
5 V, 0.8 A
FCT1-90K2SL_
120
48
218
745
0.165
9 – 18
1 : 2.3
1 : 2.8
9 V, 0.44 A
FCT1-120K2SL_
120
48
420
705
0.170
9 – 18
1 : 3.0
1 : 2.8
12 V, 0.33 A
FCT1-150K2SL_
120
48
532
732
0.215
9 – 18
1 : 3.7
1 : 2.8
15 V, 0.27 A
Secondary winding 7 – 6 not used on FCT1-120K2SL
and FCT1-150K2SL. For other parts, secondary
windings to be connected in parallel on PC board.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 2.0 – 2.1g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
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 350 per 13
″ reel Plastic tape: 32 mm wide,
0.42 mm thick, 20 mm pocket spacing, 9.16 mm pocket depth
PCB washing Only pure water or alcohol recommended
• Designed for forward topology operating at 250 kHz
• Five outputs from 3.3 V to 15 V; 9 – 18 V input
• 1500 Vrms isolation from primary and aux to the secondary
• Specified by National Semiconductor for its LM5015 Two-
Switch Forward Regulator
Dimensions are in
inches
mm
1
3
2
4
Primary
Auxiliary
Secondary
8
5
6
7
0.080
2,03
1
0.355
9,02
0.430
10,92
0.041
1,05
0.339
8,60
0.520
13,21
max
0.370
9,40
0.028
0,70
0.050
1,27
0.098
2,50
0.098
2,50
max
max
4
5
1
8
Recommended
Land Pattern
0.004 /0,10
Dot above pin1
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