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Ubiquiti Networks

Ubiquiti Networks ER-4-US firewall appliance 4-port Gigabit 1 SFP

SKU CH-GDRD-REVXH MPN ER-4-US

Fanless 4-port Gigabit router with one SFP port, delivering 3.4 million packets per second and 4 Gbps line rate

  • Speed10/100/1000Mbps
  • LAN Ports3 x 10/100/1000 RJ45 Ports 1 x 1 Gbps SFP Port
  • VPNNo
  • TemperatureOperating Temperature: -10 ~ 50 degree Celsius (14 ~ 122 deg
  • HumidityOperating Humidity: 10% ~ 90% non-condensing
  • FeaturesMax. Power Consumption: 13W Power Internal: AC Power Adapter
  • Fanless design runs silently in any environment
  • Quad-core processor handles 3.4 million packets per second at 64-byte size
  • Four Gigabit ports including one SFP give flexible WAN or LAN links
  • Compact metal chassis fits tight rack or desk spaces
  • Low 13 W draw keeps operating costs down

Compact four-port router with SFP uplink

The Ubiquiti EdgeRouter 4 is a fanless, metal-cased gateway aimed at small offices and technically minded home users who need deterministic throughput without acoustic noise. Its quad-core processor and 1 GB of RAM drive a routing engine rated at 3.4 million packets per second for 64-byte frames and a sustained 4 Gbps line rate for packets of 128 bytes or larger.

Silent metal chassis and mixed copper-fibre

The enclosure measures 1.22 by 9.02 by 5.37 inches and weighs 1.75 lbs, drawing a maximum of 13 W from an internal 110-240 V AC supply. Three RJ45 ports handle 10/100/1000 Mbps copper links while a single 1 Gbps SFP cage accepts fibre or direct-attach modules for uplinks or long-haul runs. Operating temperature spans -10 to 50 °C at 10-90 % non-condensing humidity.

Verify power, mounting and management expectations

The unit ships with an AC adapter and a reset button but no rack ears or DIN clips, so confirm you have shelf or wall space for the 9-inch width. EdgeOS provides both a graphical web interface and a full CLI, while UNMS mobile app support allows remote monitoring; ensure your team is comfortable with either workflow before deployment.

Highlights

  • Fanless design runs silently in any environment
  • Quad-core processor handles 3.4 million packets per second at 64-byte size
  • Four Gigabit ports including one SFP give flexible WAN or LAN links
  • Compact metal chassis fits tight rack or desk spaces
  • Low 13 W draw keeps operating costs down

Specifications

BrandUbiquiti
ModelER-4-US
Part NumberUBI-ER-4-US
Speed10/100/1000Mbps
LAN Ports3 x 10/100/1000 RJ45 Ports
1 x 1 Gbps SFP Port
VPNNo
TemperatureOperating Temperature: -10 ~ 50 degree Celsius (14 ~ 122 degree Fahrenheit)
HumidityOperating Humidity: 10% ~ 90% non-condensing
FeaturesMax. Power Consumption: 13W
Power Internal: AC Power Adapter
Power Input: 110-240V AC
Button: Reset
Dimensions1.22" x 9.02" x 5.37"
Weight1.75 lbs.
Shipping weight1.40 kg
Package size290 × 257 × 69 mm

Questions about this item

What throughput does the Gigabit SFP port actually cap at?

The SFP port runs at 1 Gbps, so line-rate traffic is limited to 1 Gbps even though the router can forward 4 Gbps for packets of 128 bytes or larger.

What clearance does the 1.22" x 9.02" x 5.37" metal case need for rack or shelf mounting?

The unit is 1.22 inches high, 9.02 inches wide and 5.37 inches deep; allow at least that footprint plus cable bend radius behind the RJ45 and SFP ports.

How is the EdgeRouter 4 powered up for the first time, and what step is often missed?

Connect the included AC adapter to the 110-240V input, then wait for the boot sequence to finish before accessing the web UI or CLI; skipping the wait causes login failures.

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