D-Link DEM-331R – 1000BASE-BX-U Single-Mode 40km Gigabit SFP Transceiver with Simplex LC Connector, TX 1310nm / RX 1550nm & Hot-Swappable Design
Overview:
• The D-Link DEM-331R is a Bidirectional Gigabit SFP Fiber Transceiver designed for installation in compatible SFP slots of network switches and fiber network devices.
• It supports Gigabit Ethernet transmission over single-mode fiber using a single fiber strand for both transmitting and receiving data.
• The module uses bidirectional wavelength operation, transmitting at 1310nm and receiving at 1550nm.
• The DEM-331R supports fiber cable distance up to 40km, making it suitable for long-distance campus, enterprise, and MAN fiber links.
• It features a Simplex LC connector, standard SFP metal housing, 3.3V power supply, and hot-swappable installation, and it should be paired with the matching opposite-end transceiver.
Key Features:
• 1000BASE-BX-U Gigabit SFP transceiver
• Single-mode fiber support
• Single-fiber bidirectional operation
• Distance up to 40km
• Simplex LC connector
• TX 1310nm / RX 1550nm wavelength
• IEEE 802.3z Gigabit compliant
• Hot-swappable SFP design
• Standard Small Form-Factor Pluggable package
• Single 3.3V power supply
• Durable metal enclosure
• Interoperable with D-Link Gigabit switches
• Suitable for long-distance Gigabit fiber uplinks
• Designed to pair with DEM-331T
Technical Specifications:
General:
• Brand: D-Link
• Model: DEM-331R
• Product Type: Bidirectional Gigabit SFP Fiber Transceiver
• Transceiver Type: SFP
• Fiber Media Support: Single-Mode
• Network Standard: IEEE 802.3z 1000BASE-BX-U
• Fiber Application: Long-Distance Single-Fiber Gigabit Link
• Maximum Distance: Up to 40km
• Application: Gigabit Fiber Uplink, Switch Interconnection, Backbone Link, MAN Fiber Link, Single-Fiber Network Extension
Interface and Fiber Specifications:
• Connector: Simplex LC Connector
• Fiber Type: 9/125µm Single-Mode Fiber
• Fiber Strand: Single Fiber Strand for Transmission and Reception
• Operation Type: Bidirectional Operation
• Transmit Wavelength: 1310nm
• Receive Wavelength: 1550nm
• Cable Distance: 40km
Optical Performance:
• Transmit Power Range: 2 to -3dBm
• Receive Power Range: -1 to -23dBm
• Sensitivity: -23dBm
• Minimum Power Budget: 20dB
• Maximum Power Budget: 25dB
Power and Physical Specifications:
• Power Supply: 3.3V
• Supply Current: 300mA
• Heat Generated: 2.14kJ/h
• MTBF: 420,660 Hours
• Dimensions: 13.4 × 55.5 × 11.28mm
• Weight: 20g
• Housing: Durable Metal Enclosure
• Hot Swappable: Supported
Certifications:
• EMI: FCC Class B, ICES-003 Class B, CE Class B, VCCI Class B
• Safety: TUV, UL, FDA
• RoHS: Compliant
Applications:
• Long-distance Gigabit fiber uplink
• Single-fiber network extension
• Switch-to-switch fiber connectivity
• Backbone fiber links
• Building-to-building network links
• Campus network infrastructure
• Enterprise fiber networks
• Metropolitan Area Network applications
• Long-distance fiber connectivity up to 40km
Connect Gates Recommendation:
• Connect Gates recommends the D-Link DEM-331R for projects that require Gigabit single-fiber bidirectional connectivity up to 40km.
• It is suitable when only one fiber core is available and a long-distance Gigabit fiber link is required.
• The DEM-331R should be paired with DEM-331T to complete the TX/RX wavelength match correctly.
• For proper installation, Connect Gates recommends checking switch SFP compatibility, single-mode fiber availability, LC connector compatibility, fiber distance, and the matching opposite-end transceiver wavelength before deployment.