SEL-2725

Five-Port Ethernet Switch

The SEL-2725 is an unmanaged five-port switch and copper-to-fiber-optic media converter. Single- or multimode fiber optics are available to accommodate a wide range of utility and industrial applications.

Starting at

$646

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Flexible Network Expansion

Apply the SEL-2725 as an unmanaged switch or as a media converter. Connect to devices in the same cabinet using shielded twisted-pair Category 5 cable, and communicate with the substation or plant LAN with a fiber-optic link.

Easy Installation

The SEL-2725 has no settings. The copper ports autoconfigure for crossover cables, the autospeed detects for 10 or 100 Mbps links, and it automatically detects half- or full-duplex operation. LED indicators simplify commissioning and help solve network problems.

Reliable Power Supply

Directly power the SEL-2725 from a wide range of sources with its universal power supply (12–250 Vdc, 110–240 Vac). It exceeds all harsh environmental standards, and its mean time between failures (MTBF) exceeds 2,500 years.*

Robust Performance in Harsh Environments

The SEL-2725 withstands vibration, electrical surges, electrostatic discharge, fast transients, and extreme temperatures. It meets or exceeds IEEE 1613 Class 2 and IEC 61850-3 standards for communications networking devices in electric power substations.

*This MTBF metric was calculated in December 2025.

SEL-2725 Features

SEL-2725 Details

Switch and Media Converter
Use the 100BASE-FX multimode or 100BASE-LX10 single-mode fiber-optic port options on the SEL-2725 to interconnect devices with the central or managed Ethernet switch. Apply to SEL-2725 as a multiport media converter to connect Ethernet 10/100BASE-T devices to one location or equipment rack. Keeping the electrical connections short and localized greatly reduces the possibility of induced noise. Commissioning and Troubleshooting
LED indicators simplify commissioning and help solve network problems. The green LED is solid color for established links and blinks when there is activity. The yellow LED is solid color for full-duplex operation and blinks to indicate a collision. Durability
The environmental specifications of the switch exceed the requirements of IEEE 1613 Class 2 and IEC 61850-3, making it suitable for operation in harsh environments, such as electric utility substations or industrial plants. Add conformal coating to the circuit boards to provide additional protection from harsh environments and airborne contaminants. Unmatched Reliability
Depend on reliability from SEL. Compare our superior specification compliance, lower price, and worldwide, ten-year warranty to alternatives.

Ethernet Port Configurations

Five 10/100BASE-T copper ports
Four 10/100BASE-T copper ports (Ports 1–4) and one 100BASE-FX multimode fiber port (Port 5)
Four 10/100BASE-T copper ports (Ports 1–4) and one 100BASE-LX single-mode fiber port (Port 5)
Three 10/100BASE-T copper ports (Ports 1–3) and two 100BASE-FX multimode fiber ports (Ports 4–5)
Three 10/100BASE-T copper ports (Ports 1–3) and two 100BASE-LX single-mode fiber ports (Ports 4–5)
Three 10/100BASE-T copper ports (Ports 1–3), one 100BASE-FX multimode fiber port (Port 4), and one 100BASE-LX single-mode fiber port (Port 5)

Fiber Interfaces

100BASE-FX (1,300 nm multimode LC connector, 2 km)
100BASE-LX10 (1,310 nm single-mode LC connector, 15 km)
100BASE-LX10 and 100BASE-FX (1,310 nm single-mode LC connector and 1,300 nm multimode LC connector)

Conformal Coating

Protect equipment from harsh environments and airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.