D-Link DEM-436XT-BXD20 Compatible 10GBASE-BX SFP+ BiDi Transceiver (SMF, 1330nm-TX/1270nm-RX, 20km, LC, DOM)
This D-Link DEM-436XT-BXD20 compatible SFP+ BiDi module supports 10GBASE-BX throughput up to 20km over a single strand of single-mode fiber (SMF). Unlike the regular SFP+, this BiDi transceiver integrates a DFB transmitter and PIN receiver into a simplex LC interface. By utilizing the WDM technology, it supports bidirectional communication by transmitting a 1330nm wavelength and receiving a 1270nm signal simultaneously on the same fiber. This design effectively doubles transmission capacity without requiring new fibers, thereby simplifying cabling installation. As a third-party supplier, OPTCORE provides 10GBASE-BX-D SFP+ BiDi at a very affordable price when compared to the original DEM-436XT-BXD20. Each transceiver has been coded and passes the test with the 10G SFP+ port of D-Link network switches, routers, servers, and network interface cards (NICs). Please note that this SFP+ BiDi module must be used in pairs with another transceiver of complementary wavelengths.
Features

Proven Performance
When performance and reliability are vital, use our 10G SFP+ BiDi module to build your network. OPTCORE transceivers are engineered, produced, and tested in-factory for reliable end-to-end quality.

Proven Compatibility
There’s an easy way to verify compatibility: test in real network devices. The OPTCORE 10G SFP+ BiDi module is tested for compatibility with multi-switch devices to ensure flawless functioning.

Enjoy Massive Saving
Compared to the original transceiver, the OPTCORE 10G SFP+ BiDi module can save you up to 80% on project and optical networking cabling. You won't find a better combination of quality and affordability.
Specifications
Compatible OEM Part# | DEM-436XT-BXD20 | Manufacturer | OPTCORE |
Manufacturer Part# | OPB10G-3220DCR | Form Factor | SFP+ BiDi |
Data Rate | 10 Gbps | Wavelength | 1330nm-TX/1270nm-RX |
Media Type | SMF | Max Distance | 20 km |
Transmitter Type | DFB | Receiver Type | PIN |
Transmitter Power | -3 ~ 3 dBm | Receiver Sensitivity | < -14.4 dBm |
Extinction Ratio | > 3.5 dB | Receiver Overload | > 0.5 dBm |
Connector | LC Simplex | Power Consumption | 1.2 W |
DDM/DOM | Yes | Compliance | RoHS, CE, REACH SFP+ MSA, IEEE 802.3ae SFF-8431, SFF-8432, SFF-8472 |
Environment | Operating Temperature: 0~70°C Storage Temperature: -40~85°C |
Application | 10GBase-LR/10GBase-LW Ethernet 10G fiber channel 10G data center switches and routers 10G network interface cards 10G fiber media converters |
Shipping Weight | 0.03 kg | Dimensions (LxWxH) | 56.7×13.7×8.5 mm |
Application Diagram











Key Features
Double Network Capacity without New Fiber Deployment
The regular transceiver requires two fibers to accomplish communications, while the BiDi SFP+ can communicate over just one fiber strand. By switching to a BiDi transceiver, you can instantly double network throughput with the same fiber infrastructure and finally save 50% on fiber deployment costs.
Intelligent DOM/DDM for Smart Networks
With built-in Digital Optical Monitoring function, the 10G SFP+ BiDi 20km module allows users to monitor the fiber link operating parameters in real-time. That ensures a reliable optical network and helps locate network problems quickly.
Optimal Performance and Quality for 10G Networks
Featuring a built-in Semtec/Macom chip and reliable BOSA with integrated DFB laser + PIN receiver, the BiDi SFP+ 20km module delivers low power consumption (≤1.2W) and stable optical links for 10G Bidirectional networks like 10G Ethernet and Fibre Channel. You can rest assured regarding quality and warranty.
Compatibility
- DGS-1510-20: 20-Port SmartPro Stackable Switch
- DGS-1510-28: 28-Port SmartPro Stackable Switch
- DGS-1510-28P: 28-Port SmartPro PoE Switch
- DGS-1510-28X: 28-Port SmartPro Stackable Switch
- DGS-1510-28XMP: 28-Port SmartPro PoE Switch
- DGS-1510-52: 52-Port SmartPro Stackable Switch
- DGS-1510-52X: 52-Port SmartPro Stackable Switch
- DXS-1100-10TS: 10-Port Smart Managed Switch
- DXS-1210-12SC: 12-Port 10G Web Smart Switch
- DXS-1210-12TC: 12-Port 10G Web Smart Switch
- DGS-3420-28TC: 20-Port xStack L2+ Stackable Switch
- DGS-3420-28PC: 20-Port PoE xStack L2+ Switch
- DGS-3420-28SC: 20-Port SFP xStack L2+ Switch
- DGS-3420-52T: 48-Port xStack L2+ Stackable Switch
- DGS-3420-52P: 48-Port PoE xStack L2+ Switch
- DGS-3620-28PC: 28-Port PoE+ L3 Managed Switch
- DGS-3620-28SC: 28-Port SFP L3 Managed Switch
- DGS-3620-28TC: 28-Port L3 Managed Switch
- DGS-3620-52P: 52-Port PoE+ L3 Managed Switch
- DGS-3620-52T: 52-Port L3 Managed Switch
- DXS-3600-16S: 8-Port 10G Managed Aggregation Switch
- DXS-3600-32S: 24-Port 10G Managed Aggregation Switch
- DXE-810S: 10G SFP+ PCI Express Adapter
Note: All trademarks, products, and company names mentioned are the property of their respective owners and are used for comparative purposes only. This product is NOT certified or endorsed by D-Link.
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