D-Link DEM-431XT 10GBASE-SR Multi-Mode SFP+ Transceiver
PRODUCT DESCRIPTION
D-Link DEM-431XT 10GBASE-SR Multi-Mode SFP+ Transceiver (DEM-431XT) - 5 Years Local Warranty
10 Gigabit over Multi-Mode Fibre
The D-Link DEM-431XT is a 10GBASE-SR SFP+ transceiver using an 850 nm laser over multi-mode fibre with a duplex LC connector. D-Link rates it for 300 m on OM3 and 550 m on OM4 fibre — ideal for switch uplinks and server connections within a building or data room.
Compact and Hot Pluggable
The module follows the SFF-8432 SFP+ form factor for high port density, draws 300 mA at 3.3 V, and is hot pluggable and RoHS compliant. It is certified CE, FCC and VCCI for EMI and UL, TUV and CDRH for safety.
Need help choosing? Email sales@sourceit.com.sg with your switch model, fibre type and link distance and we will match the right module for you.
D-Link DEM-431XT Datasheet — Technical Specifications
General
| Product Name | D-Link DEM-431XT 10GBASE-SR Multi-Mode SFP+ Transceiver |
| Part Number | DEM-431XT |
| Series | DEM-400 Series 10 Gigabit SFP+ Transceivers |
| Local Warranty (Singapore) | 5 years, supplied by SourceIT with a GST invoice |
Optical Interface
| Standard | IEEE 802.3ae 10GBASE-SR |
| Connector | Duplex LC |
| Media | Multi-mode fibre 50/125 µm or 62.5/125 µm |
| Wavelength | 850 nm |
| Distance by Fibre | 62.5 µm 160 MHz·km: 26 m; 62.5 µm OM1 200 MHz·km: 33 m; 50 µm 400 MHz·km: 66 m; 50 µm OM2 500 MHz·km: 82 m; 50 µm OM3 2000 MHz·km: 300 m; 50 µm OM4 3700 MHz·km: 550 m |
| Tx Power | -6.5 dBm (min) to -1 dBm (max) |
| Rx Sensitivity | -11.1 dBm |
Module, Environmental & Certifications
| Form Factor | SFP+ (SFF-8432), 14.8 x 56.5 x 11.85 mm |
| Weight | 18 g |
| Power | 3.3 V: 300 mA |
| Hot Pluggable | Yes; RoHS compliant |
| Operating Temperature | 0 to 70 °C |
| Storage Temperature | -40 to 85 °C |
| Operating Humidity | 5 to 85% |
| Storage Humidity | 5 to 95% |
| EMI | CE, FCC, VCCI |
| Safety | UL, TUV, CDRH |
Compatibility & Software Support
Host Ports
Plugs into a 10G SFP+ slot. D-Link's datasheet does not publish a host compatibility list — send us your switch model and we will confirm before you order.
Diagnostics
Digital Diagnostic Monitoring (DDM) is not listed for this model; D-Link sells separate "-DD" versions with DDM.
Package Contents & DEM-400 10G SFP+ Ordering Information
D-Link 10G SFP+ Transceivers (DEM-400 Series datasheet)
| Model | Standard | Media | Distance | Part No. |
| DEM-410T | 10GBASE-T (also 1000BASE-T) | Copper RJ45, Cat6a | 30 m | DEM-410T |
| DEM-431XT (this listing) | 10GBASE-SR, 850 nm | Multi-mode, duplex LC | 300 m OM3 / 550 m OM4 | DEM-431XT |
| DEM-432XT | 10GBASE-LR, 1310 nm | Single-mode, duplex LC | 10 km | DEM-432XT |
We also list other D-Link 10G SFP+ optics — DEM-433XT, DEM-434XT, DEM-435XT, DEM-436XT-BXD / BXU and the DDM versions DEM-431XT-DD / DEM-432XT-DD; see each listing for its specifications.
Package contents are not listed in D-Link's datasheet — ask us if you need confirmation of what is in the box.
Datasheet & Downloads
| D-Link datasheet | DEM-400 Series 10G SFP+ Datasheet, March 2019 (PDF) |
| D-Link product page | DEM-431XT on dlink.com |
Need a PDF sent directly? Email sales@sourceit.com.sg quoting DEM-431XT.
Frequently Asked Questions — D-Link DEM-431XT
How far can the DEM-431XT reach?
300 m on OM3 and 550 m on OM4 multi-mode fibre; much shorter on older OM1/OM2 fibre (33 m and 82 m). Check your cabling grade before ordering.
Does it support DDM?
DDM is not listed for the DEM-431XT. If you need optical diagnostics, choose the DEM-431XT-DD.
What connector does it use?
Duplex LC.
What warranty do I get?
5 years local warranty in Singapore, supplied by SourceIT with a GST invoice.
