Forward Mode Transformers
for 4 Watt Applications

• Developed for National Semiconductor LM5015 Two-Switch Forward Regulator
• Designed for forward topology operating at 250 kHz; Input voltage range: 9 – 18 V
• Five versions for 3.3, 5, 9, 12 and 15 Volt output
• 1500 Vrms primary to secondary isolation
• Auxiliary winding output: 10 V, 20 mA
• RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations

Photo    Pricing    Materials declaration    PDF data sheet

SPECIFICATIONS

Dimensions    Schematic     Tape and reel specifications

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FCT1-33K2SL_	120	48	53	720	0.195	1 : 1.0	1 : 2.8	3.3 V, 1.2 A
FCT1-50K2SL_	120	48	88	735	0.205	1 : 1.4	1 : 2.8	5.0 V, 0.8 A
FCT1-90K2SL_	120	48	218	745	0.165	1 : 2.3	1 : 2.8	9.0 V, 0.44 A
FCT1-120K2SL_	120	48	420	705	0.170	1 : 3.0	1 : 2.8	12 V, 0.33 A
FCT1-150K2SL_	120	48	535	732	0.215	1 : 3.7	1 : 2.8	15 V, 0.27 A

1	When ordering, please specify packaging code: e.g. FCT1-150K2SLD
	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 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 winding and is measured with the secondary windings shorted.
5	Turns ratio for secondary is with the windings connected in parallel.
6	Output of the secondary is with the windings connected in parallel. Auxiliary winding output is 10 V, 20 mA.
7	Ambient temperature range:	–40°C to +85°C
8	Storage temperature range:	Component: –40°C to +85°C T&R packaging: –40°C to +80°C
9	Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
10	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.