Datasheet 3D Models

FCT1-xxD3SL Forward Mode Transformers

for 30 Watt Telecommunications

Designed for applications up to 30 Watts in forward converter topologies.
Developed to meet IEEE 802.3at-2009 standard.
36 – 72 V input
250 kHz switching frequency
12 V aux winding output; 5 V sync winding output

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Count	Unit price
1	$7.22
175	$5.79
700	$3.48
1400	$2.71
2800	$2.33
5000	$2.14

For high volume or non-stock items, request a quote.

Packaging

D = 13" machine-ready reel

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Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Power (W)	Input Voltage (V)	Inductance min (µH) 2	DCR max (mΩ) 3				Leakage Inductance max (µH) 4	Turns Ratio 5	Frequency (kHz)	Isolation Voltage (Vrms) 6	Secondary Output (V, A)
Part number 1 (Hover for schematics)	Power (W)	Input Voltage (V)	Inductance min (µH) 2	Pri	Sec	Sync	Bias	Leakage Inductance max (µH) 4	Pri : Sec : Sync : Bias	Frequency (kHz)	Isolation Voltage (Vrms) 6	Secondary Output (V, A)
FCT1-33D3SL_	30	36 — 72	72.9	27.5	5.0	160.0	250.0	0.425	1 : 0.33 : 0.56 : 1	250	1500	3.3 V , 9 A
FCT1-50D3SL_	30	36 — 72	72.9	27.5	10.0	160.0	250.0	0.420	1 : 0.44 : 0.56 : 1	250	1500	5 V , 6 A
FCT1-120D3SL_	30	36 — 72	72.9	27.5	28.5	160.0	250.0	0.175	1 : 1 : 0.56 : 1	250	1500	12 V , 2.5 A
FCT1-195D3SL_	30	36 — 72	72.9	27.5	32.0	160.0	250.0	0.235	1 : 1.44 : 0.44 : 0.88	250	1500	19.5 V , 1.55 A
FCT1-240D3SL_	30	36 — 72	72.9	27.5	72.5	160.0	250.0	0.235	1 : 1.78 : 0.44 : 0.88	250	1500	24 V , 1.25 A

Notes

When ordering, please specify packaging code: e.g. FCT1-240D3SLD
Inductance is measured at 250 kHz, 0.2 Vrms, 0 Adc.
DCR for the primary and secondary is with the windings connected in parallel.
Leakage inductance is for the primary windings with the secondary windings shorted.
Turns ratio is with the primary windings and the secondary windings connected in parallel.
1500 Vrms winding to winding isolation.

Termination:

L = RoHS tin-silver over tin over nickel over phos bronze.
T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
S = non-RoHS tin-lead (63/37). (Special order, added cost)

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (175 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

The primary windings and the secondary windings are to be
connected in parallel on the PC board.

Transformer	Recommended output inductor
FCT1-33D3SL	SER2013-472
FCT1-50D3SL	SER1360-103
FCT1-120D3SL	MSS1278-563
FCT1-195D3SL	MSS1278-154
FCT1-240D3SL	MSS1278-224

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.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
175	330	100	13	50,4	44,4	44	32	4	2	12,0	0,4

General specification

Core Material:

Ferrite

Weight:

10.1 – 10.7 g

Packaging:

175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 12.0 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More Info.

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FCT1-xxD3SL Forward Mode Transformers

for 30 Watt Telecommunications

Selected configuration not available

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning