PoE injector MikroTik GPEN21 with SFP support, Gigabit Ethernet (10/100/1000 Mbps), 2 RJ-45 ports, white, 12–57V input

The MikroTik GPEN21 is a PoE injector with SFP support that provides Gigabit Ethernet connectivity at 10/100/1000 Mbit/s. Designed to power compatible network devices over Ethernet, the unit comes in white and is supplied as a single device per package. It accepts a wide AC adapter input voltage range and is intended for integration into wired network setups where remote powering is required.

Advantages

The GPEN21 offers both Gigabit Ethernet performance and SFP compatibility in a compact housing. It supports a broad input voltage range and can deliver up to 30 watts of power to connected devices, enabling flexible deployment in various network environments. Its small form factor simplifies placement within racks or near network endpoints.

Suitable for

• Powering PoE-enabled access points and IP cameras
• Supplying power to network switches or devices with SFP uplinks
• Small office or home network segments requiring remote power over Ethernet

Key specifications

• Power input range: 12–57 V (AC adapter)
• Power consumption: 30 W
• Data rates: 10/100/1000 Mbit/s (Gigabit Ethernet)
• Ports: 2 Ethernet (RJ-45) ports and SFP support
• Operating temperature: -20 °C to 70 °C
• Dimensions: 92 × 104 × 24 mm
• Colour: White

How to use

Connect the AC adapter within the specified 12–57 V range to the injector, then connect the upstream network source and the powered device to the appropriate Ethernet/SFP ports. Ensure the connected device supports PoE and that the injector power budget meets the device requirements. Verify link status after connections and place the injector in a location with adequate ventilation within the specified operating temperature range.

Recommendations

Use a compatible AC adapter rated for the required input voltage and sufficient power output. Keep the unit away from direct heat sources and moisture, and confirm PoE polarity and power class compatibility when connecting sensitive equipment.