| Electronics > Projects, Designs, and Technical Stuff |
| POE IEEE 802.3af pad spacing |
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| Samuel Kälin:
Hi everyone, I don't use forums very often, so please bear with me. :) I am designing a Arduino-compatible ESP32-based POE as a hobby project. It is an isolated power design that should fit the IEEE 802.3af standard. The first Prototype is already here and working (mostly :P ). For the second Version I decided to switch the POE-Ethernet jack to a low-profile variant, so that Arduino-Shields actually fit onto it. The best one I found is https://www.digikey.ch/product-detail/de/w-rth-elektronik/7498210220A/732-10843-ND/6598165 (Datasheet: https://katalog.we-online.de/pbs/datasheet/7498210220A.pdf). In the datasheet it states that it is IEEE 802.3af compliant. Now my problem: The data- and the power-pads are incredibly close together. Wouldn't that lead to a lower than 1500V rms isolation if I lead the data-lines to the other side of the isolation-zone? Do I need to add a Signal-Transformer despite already having one integrated into the Ethernet-Jack? Does anyone have any experience with the required pad-spacing? I appreciate every answer, thanks ;D Samuel |
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