WH300F-50L EFD20-series power30W Output voltage5V Output current6A POE Power Transformer
WH300F-50L EFD20-series power30W Output voltage5V Output current6A POE Power Transformer
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A conventional 100M PoE PD device does not need to support 802.3bt. 802.3bt is a four-pair high-power delivery standard, suited to ultra-high-power devices up to 90W (high-power APs, HD cameras, industrial terminals, etc.). The vast majority of 100M PoE devices on the market only need to be compatible with 802.3af (max 15.4W) and 802.3at (max 30W). Only when a 100M device's actual power consumption exceeds 30W and it requires four-pair combined power delivery to scale up power does it need to support 802.3bt.
Yes—PoE output always comes from the primary-side CT; on the secondary side, only 2 CTs are brought out for power delivery. This part's theoretical PoE power does not exceed 30W, so there is no design issue: pins 11/12 supply power and pin 9 connects to GND.
No. A 100M PoE transformer integrates only 2 pairs of differential windings, whereas gigabit Ethernet requires 4 pairs. In addition, the 100M transformer's bandwidth only supports 100Mbps and cannot meet the high-frequency signal transmission requirements of gigabit (1000Mbps).
