PoE Switches for IP Camera Systems: Everything You Need to Know
Power over Ethernet (PoE) technology allows a single CAT6 cable to carry both data and electrical power to your IP cameras. The PoE switch is the device that provides that power. Choosing the right one is critical for a reliable system.
How PoE Works
A PoE switch injects DC power onto the same twisted-pair cable used for network data. When a PoE-compatible camera is plugged in, it negotiates with the switch to receive the power it needs — all through the same RJ45 connector.
PoE Standards
| Standard | Max Power Per Port | Use Case |
|---|---|---|
| IEEE 802.3af (PoE) | 15.4W | Basic IP cameras, access points |
| IEEE 802.3at (PoE+) | 30W | PTZ cameras, high-powered cameras |
| IEEE 802.3bt (PoE++) | 60–90W | Advanced PTZ, multi-sensor cameras |
Most standard IP cameras require 7-15W. PTZ cameras typically require 20-30W. Always check your camera's PoE requirement before selecting a switch.
Total Power Budget
Every PoE switch has a total power budget — the maximum watts it can deliver across all ports simultaneously. A 8-port switch with a 65W budget cannot power eight 15W cameras at once (which would require 120W). Always calculate your total camera power draw and select a switch with at least 20% headroom.
Formula: (Number of cameras × max watts per camera) × 1.2 = minimum switch power budget
Unmanaged vs Managed PoE Switches
- Unmanaged — plug and play, no configuration needed, lower cost. Ideal for small systems under 16 cameras.
- Managed — VLAN support, traffic prioritization (QoS), remote monitoring, bandwidth control. Required for large enterprise deployments.
Long-Range PoE
Standard PoE has a 100-meter (328ft) limit per cable run. For cameras beyond that distance, use a long-range PoE switch (extended mode) that can push power and data up to 250 meters at reduced speed — or use a PoE extender.
Shop PoE Switches at IDS CCTV
We stock Hikvision and Uniview PoE switches from 4-port to 24-port in managed and unmanaged configurations. Browse our accessories section or search "PoE switch" to find the right model.
