PoE Network Switch Guide for CCTV 2026

A PoE network switch does two jobs at once: it moves data between your cameras and NVR, and it feeds each connected device DC power over the same Ethernet cable — so an IP camera runs off one cable run instead of a cable plus a separate 12V supply or injector. The important qualification is that the switch itself still needs its own power, normally from the mains, since it's the device generating and injecting that DC current (the exception is a PoE-powered switch, which takes its power from an upstream PoE port instead); a plain "unpowered" data switch, or a mains-wiring powerline adapter, does not do this and won't run a camera.

What Is a PoE Network Switch, and Do You Actually Need One?

A PoE network switch carries data and 48V DC power over the same Cat5e/Cat6 cable, eliminating the need for separate power supplies at each camera location and simplifying installation.

A PoE network switch carries data and 48V DC power over the same Cat5e/Cat6 cable, so an IP camera plugs into one RJ45 socket instead of needing a separate 12V power supply or injector at every location — this is confirmed by Cisco's PoE explainer. For CCTV, that single-cable-per-camera design is the entire commercial case for choosing PoE over a standard switch.

Why does an Ethernet switch need power in the first place?

The switch itself needs a power input because it's the device supplying the DC voltage it injects onto the cable — it can't pass on power it hasn't got. For most switches that input is the mains; PoE-powered (pass-through) switches are the exception, drawing their power from an upstream PoE port.

This answers "why does ethernet switch need power": a PoE switch takes its own power input (from the mains, directly or through an external adapter) and converts it, then pushes DC down each active port alongside the data signal, within whatever total PoE power budget that model is rated for.

On a switch like the Hikvision 16-Port PoE Switch DS-3E0318P-E/M(B), that budget is 130W shared across all connected cameras — it's why port count and camera wattage both matter when sizing a switch, not just port count alone.

PoE switch vs unpowered switch vs powerline adapter

A non-PoE ("unpowered") network switch is fine for data-only runs — linking a router to a PC or NAS — but it will never power a camera, because it has no PoE circuitry to inject DC onto the line at all. It's a legitimate, cheaper choice where nothing downstream needs power.

Don't confuse either of these with a powerline adapter: a "network switch with powerline adapter" setup uses your building's mains wiring to extend Ethernet data between two points, which is a completely different technology solving a completely different problem (extending a LAN segment, not powering an end device).

Type	Carries data	Carries DC power	Typical CCTV use
PoE switch	Yes	Yes (per switch's PoE budget)	Powers IP cameras directly, no injector needed
Unpowered switch	Yes	No	Data-only links; cameras need separate 12V or an injector
Powerline adapter	Yes (over mains wiring)	No (to end device)	Extends network reach through walls, not camera power

Do you actually need one?

If you're deploying IP cameras, yes — a PoE switch removes the need to run a separate 12V power cable or fit an injector at every camera location, and it's the standard approach for multi-camera IP installs, so the answer to "is there a PoE network switch" is simply yes. "Can you power a network switch with PoE" is a different question: most switches need their own mains supply, but PoE-powered (pass-through) switches do exist that take their power from an upstream PoE port, and some pass part of it on to devices further down the line. If your installation is analogue/HDCVI with power already run separately, or you're only linking data-only devices, an unpowered switch does the job at lower cost — check each device's datasheet before assuming PoE is needed on every port.

PoE vs PoE+: Which Standard Do Your Cameras Actually Need?

The 802.3af standard (PoE) delivers up to 15.4W per port, while 802.3at (PoE+) doubles that ceiling to 30W per port, and both run over Cat5e/Cat6 cable up to a 100m maximum length, per Cisco's PoE overview. Which one your camera actually needs depends entirely on what that camera does, not on a blanket rule.

The key takeaway: match the standard to the camera's own datasheet wattage, never assume.

What PoE (af) typically covers

A standard fixed-lens bullet or dome camera, without heaters or built-in lighting, usually draws well under the 15.4W ceiling that 802.3af provides. This is the segment where a basic PoE switch does the job without needing the extra headroom of PoE+. The Hikvision DS-3E0105P-E/M 5-Port PoE Switch is one option here, with its four PoE ports sharing a 35W total budget.

Where PoE+ (at) becomes necessary

PTZ cameras, models with built-in heaters, IR arrays, or integrated floodlights routinely push consumption past what plain PoE can supply, which is exactly the gap 802.3at closes with its 30W-per-port ceiling. The Hikvision 4-Port Gigabit PoE Switch (DS-3E0505P-E) supports 802.3af and 802.3at, with up to 30W per port and a 60W total power budget across its ports — useful headroom when even one or two cameras on the run are PoE+ hungry devices.

Don't guess — check the datasheet

Camera type	Typical demand	Standard needed
Fixed bullet/dome, no extras	Under 15.4W	PoE (af) usually sufficient
PTZ, heater, IR array, floodlight	Can exceed 15.4W	PoE+ (at) often required

This table is a starting point, not a substitute for checking the specific camera's own power rating — wattage varies by model, lens, and any accessories fitted. The only reliable check is the camera manufacturer's datasheet wattage figure, cross-referenced against the switch's per-port and total power budget.

Total budget matters as much as per-port ceiling

Even where every camera individually sits under 15.4W, a switch's overall PoE budget can be exhausted before every port is fully loaded — this is why the 60W total budget on the 4-Port Gigabit switch matters alongside its per-port 802.3at rating. Larger deployments with multiple PoE+ devices need a switch whose total budget, not just its per-port maximum, comfortably covers the sum of every connected camera's actual draw.

For multi-camera runs needing more ports and higher aggregate budgets, options such as the Hikvision 16-Port PoE Switch (DS-3E0318P-E/M(B)) with its 130W budget, or the DS-3E0526P-E 24-Port PoE Gigabit Switch at 370W, give more room for PoE+ devices without hitting a ceiling.

This is genuinely case-dependent: a five-camera fixed-lens installation and a five-camera mix of PTZ and floodlight models have very different power profiles even with an identical camera count. Always check the individual product's own specification sheet before choosing a switch, and where in doubt, shop at CCTV Master or ask about trade pricing for guidance on matching switch budget to camera load.

Managed vs Unmanaged: What's the Real Difference for CCTV?

Unmanaged switches work straight out of the box with zero configuration; managed switches add VLANs, per-port monitoring and remote diagnostics at the cost of setup time and technical know-how. For most CCTV installs, that tradeoff decides itself.

Almost every PoE switch in our current range is unmanaged, including the Hikvision 16-Port PoE Switch DS-3E0318P-E/M(B), the 24-Port DS-3E0326P-E/M(B), the DS-3E0518P-E 16-Port, and the DS-3E0526P-E 24-Port. The exception is the Dahua PFS4218-16ET-240, a Layer 2 managed 16-port PoE switch with a 240W budget that shows power draw per port and event statistics, with device search and upgrades through Dahua's ConfigTool or a web browser. If a project genuinely needs full VLAN tagging, spanning tree or SNMP monitoring, confirm those specific features on a managed switch's datasheet before you specify it.

There's one useful middle ground worth knowing about. Some unmanaged switches — not every model, so check the datasheet — offer a switchable VLAN mode that isolates downlink ports so they can only talk to the uplink port, cutting broadcast traffic and stopping camera-to-camera chatter — a slice of managed-style control without the configuration overhead of a true managed switch.

Long-range models add an Extend mode too: the DS-3E0318P-E/M(B) and DS-3E0326P-E/M(B) push PoE transmission out to 300 metres, and on the DS-3E0318P-E/M(B) a port running in long-range mode drops to 10Mbps — useful where a camera run is long and full speed isn't the priority.

The practical split: a typical single-site installation with its cameras feeding one NVR usually runs well on an unmanaged switch — plug it in, no CLI, no login screen. Larger sites needing network segmentation, VLAN tagging across multiple subnets, or remote SNMP diagnostics may need a managed switch, so check which of those features a model actually supports before you specify a job.

How Many Ports and How Much PoE Budget Do You Need?

Size a switch by camera count plus one spare port, then verify the total PoE wattage budget covers every camera running simultaneously, since shared power pools limit how many devices can be powered at once.

Size a switch by counting cameras plus one spare port for the NVR or router uplink, then check the total PoE wattage budget covers every camera running at once — not just the per-port maximum. A switch with 16 free ports is useless if its shared power budget runs out at camera twelve, because a PoE switch shares one fixed wattage budget across all its active ports rather than giving each one its full per-port allowance — the DS-3E0318P-E/M(B), for example, can supply up to 30W on any single port but has around 130W to share across all 16.

The port count tells you how many cameras fit; the wattage budget tells you how many can actually be powered at once. A 4-megapixel turret camera drawing more current than expected, or several PTZ units with heaters, can eat a shared budget far faster than a simple port count suggests — always check the camera's own PoE draw before assuming a switch has headroom.

First-party switch range by port count and budget

Model	Ports	PoE budget	Extend mode	Price
DS-3E0105P-E/M	5-port (4 PoE + 1 uplink)	35W total	300m	£47.88
DS-3E0505P-E 4-Port Gigabit PoE Switch	5-port Gigabit (4 PoE + 1 uplink)	60W total	—	£52.32
Hikvision 16-Port PoE Switch DS-3E0318P-E/M(B)	16-port	130W total	300m	—
DS-3E0326P-E/M(B) 24-Port PoE Switch	24-port	230W total	300m	—

For a small four-camera install, the Gigabit DS-3E0505P-E gives a 60W shared budget across its 4 PoE ports at £52.32. The 5-port DS-3E0105P-E/M at £47.88 adds 300m extend mode for long cable runs, but against a smaller 35W budget.

Once you're past four or five cameras, jump to the 16-port DS-3E0318P-E/M(B) with its 130W budget or the 24-port DS-3E0326P-E/M(B) at 230W, both offering 300m extend mode for longer camera runs. Always add the rated draw of every camera you intend to connect and compare that total against the switch's stated PoE budget, not its port count, before ordering — Shop at CCTV Master or ask about trade pricing if you're speccing a multi-camera site and want help matching budget to camera load.

Related products

Related products from our own range:

• Hikvision 16-Port PoE Switch | DS-3E0318P-E/M(B) — Hikvision 16-port PoE unmanaged switch with 130 W power budget, 300 m extended range and Gigabit uplink ports for CCTV and network installations.
• DS-3E0326P-E/M(B) 24-Port PoE Switch for CCTV — Hikvision 24-port PoE switch with 230 W power budget, 300 m extend mode and Gigabit uplinks. Unmanaged, plug-and-play design for IP camera systems.
• Hikvision DS-3E0518P-E 16-Port PoE Switch — 16-port Gigabit PoE switch with 230W total power budget, IEEE 802.3af/at support and 6kV surge protection. Unmanaged, rack-mountable design.
• DS-3E0526P-E 24-Port PoE Gigabit Switch — 24-port Gigabit PoE switch with 370W power budget, IEEE 802.3af/at support and 6kV surge protection. Unmanaged, rack-mountable for CCTV and network installations.