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Reliable 40G CSR4 module providing stable 300m MMF connectivity.
QSFP-40G-CSR4=
4X10GBASE-SR QSFP TRANSCEIVER MODULE MPO 300M
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QSFP-40G-CSR4=
4X10GBASE-SR QSFP TRANSCEIVER MODULE MPO 300M
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QSFP-40G-CSR4= is a QSFP transceiver that delivers a 40G data rate, designed specifically for short-range applications with multi-mode fiber connectivity. The module features LC connectors and is engineered to support Ethernet protocols, making it ideal for high-density data centers, enterprise networks, and telecom environments.
This transceiver is built in a compact QSFP form factor with dimensions intended to meet industry standards for hot-pluggable optical modules. It supports robust carrier-grade networking applications by ensuring reliable, high-speed transmission over short distances, and is optimized for use in environments where performance and compatibility with Cisco systems are critical.
QSFP-40G-CSR4= price is $629.00, a 82.2% saving from the Cisco list price of $3,534.00. QSFP-40G-CSR4= is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40G-CSR4= for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.
To get the detailed certification, please go to the Compliance Center.
 QSFP-40G-CSR4= |  QSFP-40GE-LR4-S |  CVR-CFP-4SFP10G= |  QSFP-40G-BD-RX= |  QSFP-40G-LR4-S= | |
|---|---|---|---|---|---|
| Compatibility | Cisco | Cisco, Juniper, Huawei, Arista | N/A | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | LC | LC | LC | LC | LC |
| Data Rate | 40G | 40G | 10G | 40G | 40G |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Fiber Type | Multi-mode | Single-mode | N/A | Multi-mode | Single-mode |
| Form Factor | QSFP | QSFP | CFP | QSFP | QSFP |
| Height | N/A | N/A | N/A | N/A | N/A |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 100 m | 10 km | N/A | 100 meters | 10 km |
| Network Interface | Ethernet | Ethernet | Ethernet | Fiber | Ethernet |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | N/A | 5.5W | N/A | N/A | N/A |
| Product Name | QSFP-40G-CSR4= | QSFP-40GE-LR4-S | CVR-CFP-4SFP10G= | QSFP-40G-BD-RX= | QSFP-40G-LR4-S= |
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Transmission Distance | Short-Range | Long-Range | Short-Range | Short-Range | Long-Range |
| Wavelength | 850 nm | 1271/1294/1318/1341 nm | N/A | 850nm | 1310 nm |
| Weight | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | N/A |
Reliable 40G CSR4 module providing stable 300m MMF connectivity.
Consistent MPO performance across data hall links.
Maintained steady 4x10G aggregation under load.
Excellent short-range 40G solution for dense racks.
Strong signal integrity and dependable throughput.
Easy deployment and reliable optical stability.
Solid CSR4 performance meeting enterprise standards.
The QSFP-40G-CSR4= is a 40 Gbps QSFP transceiver module that aggregates four 10 Gbps channels using 4×10GBASE-SR optics and an MPO connector, enabling high-density, short-reach data center links up to 300 meters over OM3 fiber.
This module supports a total data rate of 40 Gbps via four 10 Gbps channels at a nominal wavelength of 850 nm, optimized for multimode fiber transmission.
The QSFP-40G-CSR4= is compatible with OM3 and OM4 multimode fibers, supporting up to 300 meters on OM3 and up to 400 meters on OM4 when properly certified.
It uses a standard MPO/MTP™ 12-fiber female connector for the 4×10GBASE-SR channels, simplifying high-density fiber routing.