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Small metal SFP transceiver with LC duplex port, matte silver finish

D-Link

D-Link DEM-311GT SFP transceiver 1 Gbps LC 850nm multimode 220m/550m

SKU CH-T4B2-PWSZ8 MPN DEM-311GT

Connects Gigabit Ethernet over multimode fibre up to 220m on 62.5µm or 550m on 50µm using an 850nm LC SFP transceiver

  • Port countLC
  • Transfer speed1 Gbit/s
  • Power adapterSupport Voltage: 3.1-3.5 V Max Voltage: 6.0 V Max Current: 3
  • HighlightsOptical Receiver Sensitivity: -18dBm (max) Class 1 Laser: EN
  • Product dimensions2.3 in × 1.2 in × 0.5 in
  • Product weight0.2
  • Gigabit speeds over multimode fiber up to 220 m on 62.5 µm and 550 m on 50 µm
  • Hot-pluggable SFP transceiver installs or removes without powering down the switch
  • LC duplex connector provides secure low-loss fiber termination
  • Metal housing reduces EMI and increases physical durability
  • Class 1 laser certified to EN 60825-1 and FDA 21 CFR 1040.10/1040.11 for eye safety

SFP transceiver for Gigabit multimode links

The D-Link DEM-311GT is a Small Form-Factor Pluggable transceiver that delivers 1 Gbps over multimode fibre. It uses an 850 nm wavelength and LC duplex connectors to link switches, routers or servers inside a building or campus network. The module is hot-pluggable so it can be inserted or removed without powering down the host equipment. A metal housing limits electromagnetic interference and adds mechanical durability.

Suitable for short-range multimode deployments

This transceiver fits networks that run over 62.5 µm fibre up to 220 m or 50 µm fibre up to 550 m at Gigabit speed. It is not intended for single-mode fibre runs, for distances beyond 550 m, or for 10 Gbps and higher line rates. Buyers who need longer reach or faster throughput should select a different module.

850 nm wavelength and LC interface

The optical interface operates at 850 nm with a receiver sensitivity of -18 dBm maximum and complies with Class 1 laser safety per EN 60825-1. LC duplex connectors are required on the patch cords, and the host port must accept SFP modules with a 3.1–3.5 V supply range.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $51.99
Cheaper than about 72% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand nameD-Link
Model nameDEM-311GT
Performance
Transfer speed1 Gbit/s
Ports & slots
Port countLC
Power
Power adapterSupport Voltage: 3.1-3.5 V
Max Voltage: 6.0 V
Max Current: 300 mA
Size & build
Product dimensions2.3 in × 1.2 in × 0.5 in
Shipping weight0.07 kg
Package size127 × 76 × 53 mm

Questions about this item

Should I choose the 220m or 550m reach for my fibre run?

The 220m figure applies to 62.5µm multimode fibre while the 550m figure applies to 50µm multimode fibre; match the module to the fibre type already installed.

What does the 1 Gbps transfer rate deliver in an actual switch?

It provides full-duplex Gigabit Ethernet throughput over 850nm multimode fibre up to the distance supported by your cable grade.

How does the LC interface limit the connection in practice?

The LC duplex connector caps the link to the 220m or 550m multimode reach defined by the 850nm optics and the fibre core size used.

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