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Get a Quote or Samples →Dual-port 10/100/1000BASE-T LAN transformer (Ethernet transformer): 48-pin DIP, 1500 Vrms isolation, PoE+ (up to 720 mA). Operating temperature −40 to +85 °C.
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01Specifications
Values from published data for this part (parameters, FAQ and evaluation report). The datasheet prevails.
02Applications
The transformer isolates the PHY from the cable and couples the TX and RX differential pairs to the RJ45 jack.
Center-tap biasing on the PHY side depends on the PHY type (voltage-mode or current-mode).
Typical application for reference. Follow the PHY vendor's reference design.
Reference designs by application:Industrial ControlSecurity MonitoringData Communication
03Documents
04Quality
ISO certificates cover VOOHU's management systems. RoHS and REACH test reports cover tested samples of each product family.
05Ordering
Samples are available for evaluation, and selected parts are free of charge. Our FAE team will be glad to confirm the options for your project.
Get a Quote or Samples →06Compare
Red marks values that differ from this part; data from the published parameters of each part.
07FAQ
The specifications state that PoE supports 30 W and each channel can withstand 720 mA DC balance current. 30 W corresponds to IEEE 802.3at, also known as PoE+. The original text is given by channel. When making a port power supply budget, please understand it according to the original text. Do not multiply the number of channels to convert to the total port current. This paragraph does not apply when the port is to be powered according to 802.3bt Type 3/Type 4. Tell us the target current per port, and VOOHU will confirm the applicable scope based on current controlled data.
Two. There are 8 `1CT:1CT` inside, forming 8 channels and 4 pairsets - each Gigabit port occupies 2 pairsets, so it is a dual Gigabit port. The Chip Side (1–24 pins) and Cable Side (25–48 pins) are clearly marked on the schematic diagram. The same 48-pin 100Mbps device will have four ports, because each 100Mbps port only needs 2 channels; when inferring the number of ports based on the number of pins, you must first determine the speed range, otherwise the difference will be doubled.
Operating temperature -40 °C to +85 °C, covering common temperature ranges in outdoor and industrial sites. The WHDG48209PG has 40 °C more cold end than most 0 °C to +70 °C plug-in Gigabit parts in this catalog. It should be noted that this is the operating temperature range of the device itself. The actual temperature inside the chassis plus the self-heating of the device must fall within this range. Therefore, the device temperature point should still be measured at the highest planned internal temperature of the whole machine and the most unfavorable air duct. The isolation withstand voltage is 1500 VAC/1 mA/60 seconds. The package is plug-in type and is wave soldered.
08Support
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Typical application