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How do I use Ethernet to power a device? Use Power over Ethernet (PoE): a compatible power sourcing device sends DC power over copper Ethernet cable alongside network data to a powered device. Check the device’s PoE standard, type or class, and power requirement first; then choose a compatible PoE switch or injector with enough per-port output and, for a switch serving several devices, enough total power budget.
What PoE does—and what it does not do
Power over Ethernet combines DC power and network data on copper Ethernet cabling. It can eliminate the need for a separate power supply and nearby outlet at the powered device, such as a compatible network camera. An Ethernet-shaped RJ-45 port alone does not mean a device accepts PoE.
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The two roles are:
- Power sourcing equipment (PSE): supplies power. It may be built into a PoE switch or provided by midspan equipment such as a PoE injector.
- Powered device (PD): receives power, such as a PoE-capable camera or access point.
In standards-based PoE, the PSE detects whether a connected device is compatible before applying power. Do not connect a non-PoE device on the assumption that any Ethernet link can safely carry power.
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PoE wattage figures can describe power supplied at the PSE or available at the PD. They are not interchangeable: power delivered to the device is lower in applicable classes because of the defined delivery path. The figures below are standards-related limits, not measurements of a particular product or a guarantee for every installed cable run.
#1 Best Overall
- 𝗙𝘂𝗹𝗹 𝗚𝗶𝗴𝗮𝗯𝗶𝘁 𝟴-𝗣𝗼𝗿𝘁 𝗣𝗼𝗘 𝗖𝗼𝗻𝗳𝗶𝗴𝘂𝗿𝗮𝘁𝗶𝗼𝗻 - 8 PoEplus (802.3at/af) Gigabit RJ45 providing up to 30W per port and total PoE power budget of 65W. Up to 16 Gbps switching capacity.
- 𝗘𝘅𝘁𝗲𝗻𝗱𝗲𝗱 𝗣𝗼𝗘 𝗧𝗿𝗮𝗻𝘀𝗺𝗶𝘀𝘀𝗶𝗼𝗻 - Up to 820 ft PoE transmission distance with Extend Mode button on, perfect for surveillance camera deployment in large areas.
- 𝗣𝗼𝗘 𝗔𝘂𝘁𝗼 𝗥𝗲𝗰𝗼𝘃𝗲𝗿𝘆 - Automatically reboots your dropped or unresponsive PoE-powered devices with PoE Auto Recovery Mode on.
- 𝗣𝗹𝘂𝗴 𝗮𝗻𝗱 𝗣𝗹𝗮𝘆 - Simply plug and play for instant connectivity with no configuration required.
- 𝗦𝗶𝗹𝗲𝗻𝘁 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻 - Fanless design reduces power consumption and ensures silent operation, ideal for noise-sensitive homes or businesses.
| IEEE standard / type | Maximum PSE port supply | Maximum power at the PD | Source and qualification |
|---|---|---|---|
| 802.3af / Type 1 | 15.4 W | Not stated here | Cisco IE3500 Series Switch Software Configuration Guide, IOS XE 26.2.x, updated September 28, 2026; PSE-facing figure. |
| 802.3at / Type 2 | 30 W | Not stated here | Cisco IE3500 Series Switch Software Configuration Guide, IOS XE 26.2.x, updated September 28, 2026; PSE-facing figure. |
| 802.3bt / Type 3 | Not stated here | Up to 51 W | Ethernet Alliance, 2019 overview; PD-side figure. |
| 802.3bt / Type 4 | 90 W | Up to 71.3 W | Cisco IE3500 Series Switch Software Configuration Guide, IOS XE 26.2.x, updated September 28, 2026, for PSE supply; Ethernet Alliance, 2019 overview, for PD-side power. |
These figures explain why “90 W PoE” should not be read as 90 W arriving at every Type 4 device. The PD’s specification is the useful number when checking whether a source can power that device. For 802.3bt, Types 3 and 4 use all four cable pairs to support higher power; power classification also lets the source manage power allocation.
Choose a PoE switch or injector
PoE switch
A switch with PoE built in is usually the straightforward central source when powering multiple endpoints or when centralized network and power management is useful. Compare the number of PoE ports, each port’s supported standard and output, and the switch’s total PoE budget. A switch can have many PoE-capable ports yet still have a system-wide power ceiling shared among active ports.
Rank #2
- [Flexible Full Gigabit 5-Port PoE Configuration] 4x PoE+ (802.3at/af) 10/100/1000 Mbps RJ45 ports providing up to 30W per port and total PoE power budget of 65W, together w/ 1x Gigabit Non-PoE Port for high-speed connections.
- [Plug and Play] Easy setup with no software installation or configuration needed.
- [Advanced Software Features] Prioritize your traffic and guarantee high quality of video or voice data transmission with Port-based 802.1p/DSCP QoS and IGMP Snooping.
- [Sturdy Metal Case] Durable metal casing and desktop/wall-mounting design are well-suited for different environments.
- [Reliable and Quiet] IEEE 802.3X flow control provides reliable data transfer and Fanless design ensures quiet operation.
Midspan injector
An injector adds PoE to an Ethernet link when the existing switch does not supply it. IEEE describes PSE placement at an endpoint or midspan. For a one-device installation, an injector can avoid replacing a working non-PoE switch, provided the injector is IEEE-compatible and meets the PD’s power requirement.
Choose between them based on how many endpoints need power, what network equipment is already installed, whether centralized management matters, and the source’s available power. A single injector’s rating does not solve a total-budget issue on a separate PoE switch.
Rank #3
- GIGABIT ETHERNET PORTS: Features 8 x 1.0Gbps Ethernet ports for high-speed connectivity. Auto-negotiating ports detect the optimal speed for connected devices and work with existing Cat5e or Cat6 Ethernet cables.
- POWER-OVER-ETHERNET (PoE): Includes 8 PoE+ ports with 62W total power budget, plus uninterrupted PoE and per-port PoE controls for managed power delivery.
- EASY SMART MANAGED NETWORK SWITCH: Intuitive software interface offers Easy Smart Managed Essentials capabilities to configure VLANs, prioritize traffic with QoS, monitor ports, and manage network security for small businesses.
- FLEXIBLE MOUNTING OPTIONS: Compact metal design supports desktop or wall-mount placement for versatile installation.
- SILENT & ENERGY-EFFICIENT OPERATION: Fanless design ensures silent performance, while IEEE 802.3az Energy Efficient Ethernet reduces power consumption without compromising high-speed network performance.
How to connect a device with PoE
- Check the powered device’s official specification or label. Record its required IEEE standard, type or class, and power. Confirm explicitly that it accepts PoE; do not infer that from an Ethernet jack.
- Choose the source. Use an existing PoE switch if it supports the device’s requirement, or select a compatible injector for a link whose switch lacks PoE.
- Check capacity at both levels. Verify the PSE’s per-port capability against the PD’s requirement. If several devices share a switch, check its total PoE budget and how it allocates power as well.
- Confirm the Ethernet path and standards match. Use appropriate structured copper Ethernet cabling for the installation, and make sure the PSE and PD support interoperable IEEE PoE standards. Higher-power 802.3bt Types 3 and 4 use all four pairs.
- Connect the link and check status. Connect the PSE, Ethernet path, and PD according to their manuals. Check the switch or injector indicators and the device’s status to confirm power and network connectivity.
Cable category by itself does not change the PoE type negotiated by compatible equipment or increase the PSE’s power budget. Maximum cable length, conductor gauge, bundle temperature behavior, and interoperability can depend on the particular installation and products; use their documentation rather than assuming one universal prescription.
If the device does not power on
- Confirm the endpoint is a PoE-capable PD and that its specified standard, type or class, and power requirement are supported by the PSE.
- Check that PoE is enabled on the switch port, if the model provides a port setting.
- Check whether the switch has power budget available and whether its allocation behavior is limiting the port.
- For an injector, verify its PoE standard and rating against the device specification, and check the connections using the manufacturers’ instructions.
Switch menus, indicators, and troubleshooting behavior vary by model and software version. Cisco’s configuration documentation covers PoE budget and power management for its products; follow the exact documentation for the equipment in use.
Rank #4
- More Ports, PoE Ready: UGREEN ethernet switch offers 8 PoE+ (802.3at/af) Gigabit ports (up to 30W each) and 2 Gigabit uplink ports, with a total power budget of 60W. Ideal for efficient power delivery and seamless network connectivity
- Intelligent Power Management: If power exceeds 60W, it cuts ports in priority order (8–1) to prevent overload. It auto-detects PoE devices, supplies power to them, and transmits data only to non-PoE devices. Short-circuited ports shut off independently
- PoE Auto Recovery: In Extend Mode, ports 1–6 automatically detect and restart powered devices (such as cameras or access points) when they go offline or freeze, ensuring stable PoE operation without manual monitoring or restart
- One Touch, Three Modes: The unmanaged ethernet switch can easily switch between Standard, Port Isolation (VLAN), and Extend with one button. Port Isolation separates ports 1–8 to prevent network storms. Extend mode supports PoE up to 820 ft, ideal for security systems and long-distance deployment
- High-Speed, Low Latency: The ethernet splitter offers 1000Mbps connectivity for real-time, lag-free monitoring with security cameras, efficient IP phone connections for work, and enhanced performance for wireless access points across your network
Standards names and vendor labels
Use the IEEE standard and the device’s stated type or class to compare equipment, rather than relying on a marketing label alone. Cisco’s Catalyst 9000 documentation distinguishes IEEE standards from Cisco technologies such as UPOE and UPOE+. Those Cisco names should not be treated as synonyms for IEEE 802.3bt in every context; product terminology can vary by vendor and product family.
Quick Recap
Best Value
- GIGABIT ETHERNET PORTS: Features 5 x 1.0Gbps Ethernet ports for high-speed connectivity. Auto-negotiating ports detect the optimal speed for connected devices and work with existing Cat5e or Cat6 Ethernet cables.
- POWER-OVER-ETHERNET (PoE): Includes 4 PoE+ ports with a 63W total power budget, plus dynamic PoE allocation that redistributes unused power to support more connected devices.
- PLUG-AND-PLAY UNMANAGED NETWORK SWITCH: Simple plug-and-play setup with no software to install or configuration required.
- FLEXIBLE MOUNTING OPTIONS: Compact metal design supports desktop or wall-mount placement for versatile installation.
- SILENT & ENERGY-EFFICIENT OPERATION: Fanless design ensures silent performance, while IEEE 802.3az Energy Efficient Ethernet reduces power consumption without compromising high-speed network performance.
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