PoE (Power over Ethernet) switches are categorized by standards (Types), power classes, and usage scenarios. The main IEEE standards are 802.3af (PoE), 802.3at (PoE+), and 802.3bt (PoE++/4PPoE), each supporting different maximum wattages. Switches are also grouped by port count, speed (Fast/Gigabit/10G), and management type (unmanaged vs. managed).
🔌 PoE Standards (Types)
IEEE 802.3af (PoE)
Max power: 15.4W per port (12.95W available to device)
Typical devices: VoIP phones, basic IP cameras, small access points
IEEE 802.3at (PoE+)
Max power: 30W per port (25.5W available to device)
Typical devices: PTZ cameras, advanced Wi-Fi APs, video phones
IEEE 802.3bt (PoE++ / 4PPoE)
Type 3: 60W per port
Type 4: up to 100W per port
Typical devices: LED lighting, thin clients, laptops, high-power APs
âš¡ PoE Power Classes
PoE devices are assigned classes (0–8) that indicate how much power they need.
Class 0–3: Low-power devices (phones, cameras)
Class 4: Mid-power (Wi-Fi APs, PTZ cameras)
Class 5–8: High-power (laptops, displays, lighting)
🖧 PoE Switch Categories
PoE switches are also categorized by design and application:
Category
Description
Typical Use
Unmanaged PoE Switch
Plug-and-play, no configuration
Small offices, homes
Managed PoE Switch
VLANs, QoS, monitoring, remote control
Enterprises, schools, large networks
Smart/Hybrid PoE Switch
Limited management features
SMBs needing some control
Gigabit PoE Switch
1 Gbps ports, common today
Modern IP cameras, APs
10G PoE Switch
High-speed backbone
Data centers, high-demand networks
Industrial PoE Switch
Rugged, wide temp range
Factories, outdoor setups
📌 Key Selection Criteria
When choosing a PoE switch, consider:
Total PoE budget (Wattage) – sum of all powered devices.
Number of ports – 4, 8, 16, 24, or 48 ports.
Speed – Fast Ethernet, Gigabit, or 10G.
Management needs – simple vs. advanced control.
Environment – office vs. industrial (temperature, durability).
