Replacement for DEM331T: Drop-In Alternatives We Stock
Looking for a replacement for the DEM331T (DEM331T - D-Link 1Gbps 1000Base-BX-D Single-mode Fibre 40km TX1550nm/ RX1310nm LC Connector SFP Transceiver Module)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the DEM331T
| SKU | DEM331T |
|---|---|
| Product | DEM331T - D-Link 1Gbps 1000Base-BX-D Single-mode Fibre 40km TX1550nm/ RX1310nm LC Connector SFP Transceiver Module |
| Current price | $226.08 |
| Stock status | In Stock |
| Detail page | View DEM331T › |
Drop-in replacements for DEM331T
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
SFP-LHX1310-40-D - Zyxel SFP-LHX1310-40 1.25Gbps 1000Base-EX Single-Mode Fibre 40km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: SFP-LHX1310-40-D
Price: $134.01
GLC-BX-U-40KM - Cisco 1Gbps 1000Base-BX-U Single-mode Fiber 40km 1310nmTX/1490nmRX LC Connector SFP Transceiver Module
SKU: GLC-BX-U-40KM
Price: $145.87
SFP-OC3-LR1-AS - Agilestar OC-3/STM-1 LR-1 Single-mode Fibre 40km 1310nm LC Connector SFP Transceiver Module
SKU: SFP-OC3-LR1-AS
Price: $126.11
OC3-SFP-LR1 - Alcatel ATM/SONET 155Mbps OC-3/LR-1 Single-Mode Fibre 40km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: OC3-SFP-LR1
Price: $157.26
SFP-MR27D-LR1 - Gigatech MRV OC-48/STM-16 LR1 Single-Mode Fibre 40km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: SFP-MR27D-LR1
Price: $290.54
DS-SFP-FC8G-ER - Cisco Single-mode 8Gbps Fibre Channel Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: DS-SFP-FC8G-ER
Price: $828.95
OC3-SFP-LR1-AS - Agilestar ATM/SONET OC-3/STM-1 LR-1 Single-mode Fibre 40km 1310nm LC Connector SFP Transceiver Module
SKU: OC3-SFP-LR1-AS
Price: $2,352.29
DEM331R - D-Link 1Gbps 1000Base-BX-U Single-mode Fiber 40km TX-1310nm/ RX-1550nm LC Connector SFP Transceiver Module
SKU: DEM331R
Price: $218.83
DEM-433XT-DD - D-Link 10Gbps 10GBase-ER Single-mode Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: DEM-433XT-DD
Price: $450.00
DEM-433XT - D-Link 10Gbps 10GBase-ER Single-mode Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: DEM-433XT
Price: $669.58
XFP-1550-10GE-40KM - Huawei 11.1Gbps Single-mode Fiber 40km 1550nm LC Connector XFP Optical Transceiver Module
SKU: XFP-1550-10GE-40KM
Price: $10,639.63
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.