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QSFP-40GE-LR4
QSFP 40GBASE-LR4 Transceiver Module, LC, 10KM
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QSFP-40GE-LR4 is a QSFP+ transceiver engineered for 40G Ethernet applications. It supports a 40G data rate using LC connectors and is intended for long-range transmission over single-mode fiber, reaching distances up to 10 km. This module meets rigorous standards and supports Ethernet protocols, making it an ideal choice for data centers, enterprise networks, and telecom environments.
Designed with a reliable QSFP+ form factor, QSFP-40GE-LR4 offers industry-standard physical dimensions suitable for high-density network applications. Its robust design and compatibility with leading networking equipment from vendors such as Cisco, Juniper, Huawei, and Arista ensure that it delivers efficient performance in demanding long-range deployments.
QSFP-40GE-LR4 price is $3,309.00, a 76.4% saving from the Cisco list price of $13,995.00. QSFP-40GE-LR4 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QSFP-40GE-LR4 for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.
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| QSFP-40GE-LR4 |  CFP-40G-SR4 |  QSFP-40G-SR-BD |  CFP-40G-FR | |
|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP+ | CFP | QSFP | CFP |
| Data Rate | 40G | 40G | 40G | 40G |
| Connector Type | LC | LC | LC | LC |
| Wavelength | 1310 nm | 850 nm | 850nm | 1310nm |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Long-Range |
| Fiber Type | Single-mode | Multi-mode | Multi-mode | Single-mode |
| Max Distance | 10 km | 100 m | 150 meters | 10 km |
| Supported Protocols | Ethernet | Ethernet | Ethernet | Ethernet, Fibre Channel |
| Network Interface | Fiber | Fiber | Ethernet | Fiber |
| Power Consumption | 6.0 W | 6.5W | 3.8W | 6.0W |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista |
| Product Name | QSFP-40GE-LR4 | CFP-40G-SR4= | QSFP-40G-SR-BD= | CFP-40G-FR= |
| Height | N/A | N/A | N/A | 1.2 inches |
| Width | N/A | N/A | N/A | 4.4 inches |
| Depth | N/A | N/A | N/A | 7.5 inches |
| Weight | N/A | N/A | N/A | 1.5 lbs |
Delivered steady 40G throughput over single mode fiber. Reliable option for enterprise backbone expansion.
Installed easily and maintained consistent link performance across 10km.
Strong optical output and dependable signal integrity.
Reliable QSFP+ LR4 module with predictable latency and stability.
Excellent compatibility with our core switches. Zero packet drops.
Consistent long-range performance for mission critical links.
High quality optics providing stable 40G connectivity.
The QSFP-40GE-LR4 is a 40GBASE-LR4 quad-lane, hot-pluggable transceiver module supporting 40Gbps links over single-mode fiber up to 10km.
It uses single-mode fiber (SMF) with LC duplex connectors for reliable 40G transmission.
The QSFP-40GE-LR4 supports optical links up to 10 kilometers over single-mode fiber.
It employs four CWDM wavelengths centered at 1271nm, 1291nm, 1311nm, and 1331nm for 40G transmission.
It provides an aggregated data rate of 40Gbps via four independent 10Gbps lanes.
Yes, the module is hot-pluggable and can be inserted or removed without powering down the host device.
It is compatible with any QSFP+ 40GBASE-LR4-capable switch or router from major vendors such as Cisco, Juniper, and Arista.
Yes, it is SFF-8472 compliant and offers real-time DDM for optical power, temperature, voltage, and bias current.
The standard operating temperature range is 0°C to 70°C (32°F to 158°F).
Typical power consumption is under 3.5W, meeting IEEE 802.3ba power budgets.
It uses the QSFP+ form factor and complies with IEEE 802.3ba 40GBASE-LR4, MSA, and RoHS standards.
Align the module with the QSFP+ port, insert until the latch engages, then verify link status on your host device.
LR4 uses CWDM over single-mode fiber for up to 10km, while SR4 uses parallel multimode fiber for shorter distances up to 150m.
Yes, it supports Reed-Solomon FEC for improved link performance and error resilience.
It includes a one-year limited warranty and lifetime technical support from the manufacturer.
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