Replacement for DEM331R: Drop-In Alternatives We Stock
Looking for a replacement for the DEM331R (DEM331R - D-Link 1Gbps 1000Base-BX-U Single-mode Fiber 40km TX-1310nm/ RX-1550nm 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 DEM331R
| SKU | DEM331R |
|---|---|
| Product | DEM331R - D-Link 1Gbps 1000Base-BX-U Single-mode Fiber 40km TX-1310nm/ RX-1550nm LC Connector SFP Transceiver Module |
| Current price | $218.83 |
| Stock status | In Stock |
| Detail page | View DEM331R › |
Drop-in replacements for DEM331R
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.
GLC-BX40-D-I - Cisco 1.25Gb/s 1000Base-BX40-D Single-Mode Fiber 40km 1550nm-TX/1310nm-RX LC Connector SFP Transceiver Module
SKU: GLC-BX40-D-I
Price: $309.82
34060638-001 - Huawei 1.25Gbps Single-mode Fiber 40km TX: 1310nm RX: 1550nm LC Connector SFP BiDi Transceiver Module
SKU: 34060638-001
Price: $3,359.04
34060639-001 - Huawei 1.25Gbps Single-mode Fiber 40km TX: 1550nm and RX 1310nm LC Connector SFP BiDi Transceiver Module
SKU: 34060639-001
Price: $3,645.64
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
SFP-GD-BD53 - Gigatech MRV 1Gbps 1000Base-BX-D Bi-Directional 40km Single-mode Fiber 1550nm/1310nm SFP Transceiver
SKU: SFP-GD-BD53
Price: $290.54
TN-SFP-OC3SB42 - Transition 100Mbps 100Base-FX Single-mode Fiber 1550nm TX/1310nm RX SM (LC) 40km SFP (mini-GBIC) Transceiver Module
SKU: TN-SFP-OC3SB42
Price: $363.16
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
SFP-10G-ER - Cisco 10Gb/s 10GBase-ER Single-Mode Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: SFP-10G-ER
Price: $312.00
EX-SFP-10GE-ER - Juniper 10Gbps 10GBase-ER Single-mode Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: EX-SFP-10GE-ER
Price: $452.63
SFP-10G-ER-S - Cisco 10Gb/s 10GBase-ER Single-Mode Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: SFP-10G-ER-S
Price: $743.86
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.