Choose a Power over Ethernet standard based on each device’s power requirement: IEEE 802.3af supports up to 15 watts per port, 802.3at supports up to 30 watts, and 802.3bt supports higher-power devices, with some switches providing up to 90 watts per port. Add the expected power draw of all connected devices, then select a hardened Power over Ethernet switch with a total power budget that covers the combined load and its per-port limits, such as 120, 240, or 320 watts in this assortment.

Compare the enclosure rating and operating temperature range, such as IP66 or NEMA 4/4X protection for outdoor installations and IP40 protection with operation from -40°F to 167°F for some industrial switches. Also review installation features such as a rugged metal housing, DIN rail mounting, integral surge protection, redundant power inputs, battery charging, and automatic transfer to standby power, based on the needs of the site.

Choose copper Ethernet ports when you need to connect nearby PoE devices, such as cameras, access controllers, or other edge equipment, with power and data over one cable. Choose fiber SFP uplinks for longer runs or electrically noisy environments, and choose a combination when the switch must serve local PoE devices while linking to a remote network over fiber.

Plan for the switch’s required power source, PoE budget, and device load, which may include 48- to 55-volt DC input, AC power with battery charging, or an external power supply, along with copper Ethernet ports, a Gigabit SFP uplink, or both. Choose an enclosure suited to the site, such as a rugged IP40 housing for harsh indoor environments or a NEMA 4/4X, IP66-rated enclosure for outdoor installations, and account for the switch’s operating-temperature range and mounting method.