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FCT1-xxD3SL Forward Mode Transformers

for 30 Watt Telecommunications

RoHS compliant
  • 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
Buy Now:
Count Unit price
1 $4.12
175 $3.30
700 $2.87
1400 $2.23
2800 $1.91
5000 $1.75

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

. in stock, ready to ship today.
Request a Sample:

Specifications

Electrical specifications at 25°C.

Part number 1 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)
Pri Sec Sync Bias Pri : Sec : Sync : Bias
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
  1. When ordering, please specify packaging code: e.g. FCT1-240D3SLD
  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. 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)
  • 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.
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):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

fct1xxd3slschematic.gif

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

fct1xxd3sldimensions.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T FCT1-xxD3SLorientation.gif
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.