
The 40G QSFP+ QSFP-40G-ER4 40km 1310nm Duplex LC/UPC Module, Cisco is a QSFP+ optical transceiver delivering 44.6Gbps (4x 11.2Gbps) over SMF. Operating at 1310nm with a Duplex LC interface, it reaches 40km and is compliant with OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant. Built-in digital diagnostics give real-time access to operating parameters, making the module easy to deploy and maintain in 40G Ethernet data center and enterprise network environments.
Product Highlights
- QSFP+ form factor, 44.6Gbps (4x 11.2Gbps) data rate
- Wavelength: 1310nm
- Connector: Duplex LC
- Reach: up to 40km
- Fiber media: SMF
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | QSFP-40G-ER4 |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP+ |
| Max. Data Rate | 44.6Gbps (4x 11.2Gbps) |
| Wavelength | 1310nm |
| Max. Transmission Distance | 40km |
| Connector | Duplex LC |
| Media | SMF |
| Transimitter Type | DFB CWDM |
| Receiver Type | APD |
| TX Power | -2.7~4.5dBm |
| Receiver Sensitivity | <-21.2dBm |
| Power Budget | 18.5dB |
| Receiver Overload | -4.5dBm |
| Max. Power Consumption | ≤3.5W |
| Extinction Ratio | >5.5dB |
| Host FEC | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Protocols | OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant |
Applications
Network architects choose the 40G QSFP+ QSFP-40G-ER4 40km 1310nm Duplex LC/UPC Module, Cisco for 40G Ethernet data center and enterprise network environments: it runs 44.6Gbps (4x 11.2Gbps) over SMF and reaches 40km. With its Duplex LC optical interface, the module works directly with the SMF infrastructure already installed in most facilities. It is interoperable with Cisco platforms and replaces the Cisco part QSFP-40G-ER4 directly.
Standards and Compatibility
On the compatibility side, this unit is the practical equivalent of the Cisco part QSFP-40G-ER4 and works in Cisco systems out of the box. Standards compliance covers OTN OTU3, 40G Ethernet, SATA/SAS3, MSA Compliant.
Ordering Information
To order, quote QSFP-ER4-40G together with your quantity. Stock items ship quickly; for OEM orders we support custom labels, retail packing and vendor-specific coding, all handled in our own factory.
How We Ship
Most orders travel by international express and arrive within days; palletized freight by air or sea is used for volume orders. If you prefer, we ship on your DHL, UPS or FedEx account, or deliver to your appointed agent in China for onward consolidation.
Quality and Testing
Every unit we ship is tested in our own test bed on mainstream switch and transport platforms before packing. Our test center has been fully upgraded, which sets us apart from other third party product providers: 10G, 40G, 100G, 200G and 400G transceivers and direct attach cables are verified on the latest top brand equipment, including selected original switches that can hardly be found elsewhere.
Package
Products are first packed into blister trays or self-sealed bags and then into cartons. Standard labels and marks are applied by default, and customized packing and labeling are available on request.
Built to Your Spec
Our product line has grown with the industry for three decades, from GBIC-era modules to today's 800G and 1.6T interconnects. If the exact configuration you need is not listed, we can usually build it: custom lengths, mixed connector breakouts, OEM branding and project-specific firmware coding are all supported.



