Reference Data
PoE Specification
Property
802.3af
(PoE)
Type 1
802.3at
(PoE+)
Type 2
802.3bt
(4PPoE)
Type 3
802.3bt
(4PPoE)
Type 4
Non-Standard
UPoE
Max. power
delivered by PSE
(Watts)
15.4
30
60
90/100
60
Min. power
Available for PD
(Watts)
12.95
25.5
51-60
71-90
51
Voltage range
At PSE (Volts)
44-57
50-57
50-57
52-57
Max. 57
Voltage
available at PD
(Volts)
37-57
42.5-57
42.5-57
41.1-57
Max. 57
Max current (mA)
350
600
600 per pair
960 per pair
600-720
Number of wire
that carries power
(pair)
2-pair
2-pair
4-pair
4-pair
4-pair
PoE Classification
Class Number
PSE output Power
(Watts)
PD input power
(Watts)
PD type
Notes
0
15.4
12.95
1
802.3af
1
4
3.84
1
(2-pair PoE)
2
7
6.49
1
3
15.4
12.95
1
4
30
25.5
2
802.3at (PoE+)
5
45
40
3
802.3bt
6
60
51
3
(4PPoE)
7
75
62
4
802.3bt
8
99
71.3
4
(4PPoE)
Note:
- PSE does not always meet the wattage specification for its class.
- Actual wattage may vary depending on the network cable’s grade/quality and length.
