2021-12-01 22:28:09 +00:00
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:PROPERTIES:
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:ID: 6de2329b-bdba-45ff-bfda-d4df5c2879c8
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:ROAM_ALIASES: PoE
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:END:
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#+title: Power Over Ethernet
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2024-12-19 01:02:13 +00:00
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#+caption: Standard Types and Power Levels
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| Name | IEEE Standard | Maximum PSE Power | PD Available Power |
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|-------+-----------------------+-------------------+--------------------|
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| PoE | IEEE 802.3af (Type 1) | 15.4 W | 12.95 W |
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| PoE+ | IEEE 802.3at (Type 2) | 30 W | 25.50 W |
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| PoE++ | IEEE 802.3bt (Type 3) | 60 W | 51 W |
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2024-12-19 05:19:07 +00:00
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| PoE++ | IEEE 802.3bt (Type 4) | 90 W | 71.3 W |
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#+caption: PoE Classes
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| Class | Usage | Classification current (mA) | Power range at PD (W) | Max power from PSE (W) |
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|-------+------------------------------------------+-----------------------------+-----------------------+------------------------|
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| 0 | Default | 0–5 | 0.44–12.94 | 15.4 |
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| 1 | Optional | 8–13 | 0.44–3.84 | 4.00 |
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| 2 | Optional | 16–21 | 3.84–6.49 | 7.00 |
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| 3 | Optional | 25–31 | 6.49–12.95 | 15.4 |
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| 4 | Valid for Type 2 (802.3at) devices[fn:1] | 35–45 | 12.95–25.50 | 30 |
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| 5 | Valid for Type 3 (802.3bt) devices | 36–44 & 1–4 | 40 (4-pair) | 45 |
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| 6 | 36–44 & 9–12 | 51 (4-pair) | 60 | |
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| 7 | Valid for Type 4 (802.3bt) devices | 36–44 & 17–20 | 62 (4-pair) | 75 |
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| 8 | 36–44 & 26–30 | 71.3 (4-pair) | 90 | |
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* Footnotes
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[fn:1] Class 4 is not allowed for 802.3af devices
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