SMT PoE Transformers
for
Silicon Laboratories Si3400 & Si3401
- Specified by Silicon Laboratories for Si3400 & Si3401 PD Controllers
- Designed for 15 Watt, IEEE 802.3af-compliant PoE applications
- 36 – 72 V input. Versions for 12 V, 5 V and 3.3 V output
- 200 kHz operating frequency
- Power inductor DO5010H-333 also specified for Si3400 circuit.
- RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations.
Photo 
Pricing 
Materials declaration FA2805
FA2924 FA2925
SPECIFICATIONS
Dimensions 
Schematic
Tape and reel specifications
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| FA2924-AL_ | 40.0 | 36.0 | 0.100 | 0.025 | 0.666 | 13 : 4 | 2.0 | 3.3 V, 4.5 A |
| FA2805-CL_ | 40.0 | 36.0 | 0.108 | 0.040 | 0.621 | 5 : 2 | 2.0 | 5.0 V, 3.0 A |
| FA2925-AL_ | 40.0 | 36.0 | 0.100 | 0.155 | 0.566 | 1 : 1 | 2.0 | 12.0 V, 1.25 A |
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| 1 | When ordering, please specify packaging code: e.g. FA2925-ALD | |
| Packaging: |
D = 13" reel, machine-ready 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. |
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| 2 | Inductance is for the primary, measured at 200 kHz, 0.2 Vrms, 0 Adc. | |
| 3 | Ipk is peak primary current drawn at minimum input voltage. | |
| 4 | DCR for the secondary is per winding. | |
| 5 | Leakage inductance is measured across the primary with all other windings shorted. | |
| 6 | Turns ratio is with the secondary windings connected in parallel. | |
| 7 | Output is with the secondary windings connected in parallel. | |
| 8 | Ambient temperature range: | –40°C to +85°C |
| 9 | Storage temperature range: | Component: –40°C to +85°C Packaging: –40°C to +80°C |
| 10 | 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. | |
| 11 | Electrical specifications at 25°C. | |
| Refer to Soldering Coilcraft Components before soldering. | ||