Side-by-Side Comparison
Power over Ethernet
PoE (802.3af) vs. PoE+ (802.3at)
Comparing 2 standards across 9 specifications. 8 key differences identified.
Comparing:
PoE (802.3af)
PoE+ (802.3at)
Power over Ethernet (PoE, IEEE 802.3af Type 1) is a 2003 networking standard that delivers up to 15.40 W of direct current (DC) power from a Power Sourcing Equipment (PSE) port, guaranteeing 12.95 W of usable power at the Powered Device (PD) over two twisted pairs.
Power over Ethernet Plus (PoE+, IEEE 802.3at Type 2) is a 2009 standard delivering up to 30.0 W of DC power per PSE port and guaranteeing 25.50 W of continuous power at the connected Powered Device (PD) across two twisted pairs of Category 5e or better cable.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
IEEE Standard
|
IEEE 802.3af-2003 | IEEE 802.3at-2009 |
|
PoE Type
|
Type 1 (PoE) | Type 2 (PoE+) |
|
PSE Output Power (Max)
|
15.40 W | 30.0 W |
|
PD Input Power (Guaranteed)
|
12.95 W | 25.50 W |
|
PSE Output Voltage Range
|
44.0–57.0 V DC | 50.0–57.0 V DC |
|
PD Input Voltage Range
|
37.0–57.0 V DC | 42.5–57.0 V DC |
|
Max Current
|
350 mA | 600 mA |
|
Twisted Pairs Energized
|
2 pairs (Alternative A or B) | 2 pairs (Alternative A or B) |
|
Minimum Cable Category
|
Category 3 (Cat 5/5e standard) | Category 5e |