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QDD-400G-LR8-S
400G QSFP-DD Tranceiver, 400GBASE-LR8, Duplex LC, 10km Duple...
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QDD-400G-LR8-S is a 400G optical transceiver module in a QSFP-DD form factor engineered for long-range applications. It supports 400G Ethernet over single-mode fiber using LC connectors and is designed to transmit data reliably over distances up to 10 km, making it well suited for high-capacity data centers, telecom networks, and enterprise environments.
Optimized for high-speed interconnects, QDD-400G-LR8-S meets stringent industry standards with compact physical dimensions, low power consumption, and robust compatibility with leading network platforms. Its design and performance make it an ideal choice for modern infrastructures requiring long-range, high-throughput optical communication.
QDD-400G-LR8-S price is $24,898.00, a 47.2% saving from the Cisco list price of $47,187.00. QDD-400G-LR8-S is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QDD-400G-LR8-S for additional pricing. Browse the full Cisco 400G Optical Modules series or explore all Cisco products.
To get the detailed certification, please go to the Compliance Center.
| QDD-400G-LR8-S |  QDD-400G-DR4-S |  QDD-2X100-CWDM4-S |  QDD-2X100-SR4-S |  QDD-400-CU2M | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP-DD | QSFP-DD | QSFP28 | QSFP28 | QSFP-DD |
| Data Rate | 400G | 400G | 100G | 2x100G | 400G |
| Connector Type | LC | LC | LC | LC | Twinaxial |
| Wavelength | 1310 nm | N/A | 1271/1291/1311/1331 nm | 850 nm | N/A |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Short-Range | Short-Range |
| Fiber Type | Single-mode | Multi-mode | Single-mode | Multi-mode | N/A |
| Max Distance | 10 km | 500 meters | 2000 meters | 100 meters (OM4) | 2 meters |
| Supported Protocols | Ethernet | Ethernet, Fibre Channel | Ethernet / Fibre Channel | Ethernet | Ethernet |
| Network Interface | Ethernet | Ethernet | Fiber | Fiber | Ethernet |
| Power Consumption | 20 W | N/A | 6 W | 6.5W | N/A |
| Operating Temperature | 0 to 70°C | 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 | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | N/A |
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista |
| Product Name | QDD-400G-LR8-S | QDD-400G-DR4-S | QDD-2X100-CWDM4-S | QDD-2X100-SR4-S | QDD-400-CU2M |
| Height | 0.80 inches | 0.44 inches | 0.67 inches | N/A | N/A |
| Width | 0.66 inches | 0.85 inches | 0.98 inches | N/A | N/A |
| Depth | 1.68 inches | 2.20 inches | 1.78 inches | N/A | N/A |
| Weight | 0.25 lbs | 0.12 lbs | 0.34 lbs | N/A | N/A |
Configured for 10km single mode links. Achieved consistent 400G throughput with stable optical levels.
Excellent long haul performance. Reliable 400G connectivity for core network expansion.
Smooth deployment and strong signal consistency over distance. Perfect for inter-site data center connectivity.
Stable 400G LR8 optics with predictable latency. Met all performance benchmarks in our testing.
High quality construction and dependable 10km reach. Ideal for backbone infrastructure upgrades.
Integrated flawlessly with our switching platform. Maintains clean signal even under heavy traffic.
Reliable long distance 400G solution. Delivered sustained bandwidth without interruptions.
The QDD-400G-LR8-S is a 400G QSFP-DD transceiver module that supports 400GBASE-LR8 transmission over Duplex LC single-mode fiber up to 10 km.
It supports link lengths up to 10 kilometers on OS2 single-mode fiber with Duplex LC connectors.
The module uses standard Duplex LC connectors for single-mode fiber links.
It operates at 400Gbps and complies with the IEEE 802.3bs 400GBASE-LR8 standard.
Yes, it is QSFP-DD MSA compliant and interoperable with most leading switch and router brands.
It uses eight CWDM lanes around 1310 nm for 400GBASE-LR8 transmission.
The typical power draw is ≤12 Watts, optimizing data center energy efficiency.
It operates reliably from 0 °C to 70 °C (32 °F to 158 °F) ambient temperature.
It is RoHS-compliant and meets CE, FCC and QSFP-DD MSA standards.
OS2 single-mode fiber with ≤0.5 dB/km attenuation is recommended.
Align the module with the QSFP-DD port, insert until it clicks, and secure the latch.
Use your switch’s diagnostic CLI or an SFP-DD tool to check optical power, temperature, and link status.
Yes, as long as they comply with QSFP-DD MSA and IEEE 802.3bs 400GBASE-LR8 specifications.
It provides a minimum output power of –5.3 dBm, receiver sensitivity of –10.4 dBm, and a 5.1 dB link margin.
It includes a 5-year limited warranty and free lifetime technical support.
Check fiber cleanliness, connector integrity, diagnostics reports, and correct lane mapping on your switch.