
The 40G QSFP+ QSFP-40G-CSR4 400m 850nm MPO-12/UPC Module, Cisco is a QSFP+ optical transceiver delivering 42Gbps (4x 10.5Gbps) over MMF. Operating at 850nm with a MTP/MPO-12 Male interface, it reaches 400m@OM4 and is compliant with 40G Ethernet, SATA/SAS3, IEEE 802.3ba, 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, 42Gbps (4x 10.5Gbps) data rate
- Wavelength: 850nm
- Connector: MTP/MPO-12 Male
- Reach: up to 400m@OM4
- Fiber media: MMF
- Operating temperature: 0 to 70°C (32 to 158°F)
Specifications
| Cisco Compatible | QSFP-40G-CSR4 |
|---|---|
| Manufacturer | HT |
| Form Factor | QSFP+ |
| Max. Data Rate | 42Gbps (4x 10.5Gbps) |
| Wavelength | 850nm |
| Max. Transmission Distance | 400m@OM4 |
| Connector | MTP/MPO-12 Male |
| Media | MMF |
| Transimitter Type | VCSEL 850nm |
| Receiver Type | PIN |
| TX Power | -7.5~0dBm |
| Receiver Sensitivity | <-9.9dBm |
| Power Budget | 2.4dB |
| Receiver Overload | 2.4dBm |
| Max. Power Consumption | ≤1.5W |
| Extinction Ratio | >3dB |
| Host FEC | Supported |
| Bit Error Ratio (BER) | 1E-12 |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Protocols | 40G Ethernet, SATA/SAS3, IEEE 802.3ba, MSA Compliant |
Applications
Network architects choose the 40G QSFP+ QSFP-40G-CSR4 400m 850nm MPO-12/UPC Module, Cisco for 40G Ethernet data center and enterprise network environments: it runs 42Gbps (4x 10.5Gbps) over MMF and reaches 400m@OM4. With its MTP/MPO-12 Male optical interface, the module works directly with the MMF infrastructure already installed in most facilities. Compatibility with Cisco systems is verified in our own test lab before shipment, so the unit works out of the box as an equivalent of QSFP-40G-CSR4.
Standards and Compatibility
Compliance: 40G Ethernet, SATA/SAS3, IEEE 802.3ba, MSA Compliant. For projects standardized on Cisco hardware, this product replaces the QSFP-40G-CSR4 directly, with identical fit and function. Every unit's EEPROM coding and link behavior are verified on real host equipment in our lab, so what arrives at your site is ready to use.
Ordering Information
Our part number for this module is QSFP-CSR4-40G. When ordering, just let us know the quantity and whether you need the compatibility coding for a particular switch brand; labeling and packaging can also follow your channel requirements.
Tested Before Shipment
We do not ship untested stock. Each transceiver and cable is powered up in our test racks, checked for link stability, transmit power, receiver sensitivity and diagnostic readouts, and only then packed for delivery. This factory-level testing is one reason network integrators keep reordering from us year after year.
Packing Details
Standard packing is an anti-static bag plus blister protection, with cartons sized to keep products from moving in transit. We apply our standard labels by default; neutral packing or customer-branded labels, part number stickers and serial barcodes are all available on request.
Customization Service
Because we are the factory, customization is straightforward: non-standard lengths, different jacket materials, specific polarity or breakout wiring, and compatibility programming for particular switch brands are all routine work for us. Small trial orders are accepted so you can verify quality before scaling up.
Delivery
Goods are normally sent by courier such as DHL, UPS, FedEx, TNT or EMS; air and sea freight are also available on request. Commonly used items are kept in stock for immediate shipment, and out-of-stock items are usually delivered within a few working days. We can also ship on your courier account or hand goods to your appointed forwarder.



