QDD-400G-SR8-S Cisco Compatible 400GBASE-SR8 QSFP-DD PAM4 Transceiver - 100m
Warranty: Lifetime
Quick answer: The QDD-400G-SR8-S Cisco-compatible module is a 400GBASE-SR8 QSFP-DD optic that runs 400 Gigabit Ethernet over multimode fiber at 850 nm, up to 70 m on OM3 and 100 m on OM4/OM5, using eight 50G PAM4 lanes on an MPO-16 connector, with DOM. It is coded to work in Cisco switches that call for QDD-400G-SR8-S. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco QDD-400G-SR8-S Compatible 400GBASE-SR8 QSFP-DD PAM4 Optical Transceiver - 100m Reach
This third-party QSFP-DD optical transceiver is fully compatible with Cisco QDD-400G-SR8-S, delivering 400Gbps Ethernet over parallel multimode fiber (MMF) up to 100 meters. Perfect for short-reach, high-density connections in AI/HPC GPU clusters, hyperscale data centers, and spine-leaf architectures where low cost and power efficiency are key.
Built to MSA standards with 8x50G PAM4 parallel lanes, it features an MPO-16 connector and digital diagnostics (DOM). Backed by our lifetime warranty and rigorous testing—get 70-90% savings vs. genuine Cisco OEM with proven reliability.
Key Features
- Massive Cost Savings: Premium compatible optics—scale dense AI networks affordably.
- Plug-and-Play: Hot-pluggable QSFP-DD form factor with pre-programmed EEPROM for seamless Cisco compatibility.
- Short-Reach Efficiency: 100m over OM4/OM5 MMF—ideal for intra-rack or row-level GPU interconnects.
- Lifetime Warranty: Fully tested.
- Use Cases: High-bandwidth links in AI/HPC GPU clusters, data center top-of-rack switches, or multi-node training fabrics.
Technical Specifications
- Data Rate: 400Gbps (400GBASE-SR8, 8x53.125Gbps PAM4)
- Wavelength: 850nm
- Connector: MPO-16 (parallel MMF)
- Reach: Up to 100 meters on OM4/OM5 multimode fiber (70m on OM3)
- Power Consumption: ≤12W
- Operating Temperature: 0°C to 70°C
- Standards Compliance: IEEE 802.3bs, QSFP-DD MSA, CMIS 4.0, RoHS
- Features: Digital Optical Monitoring (DOM/DDM) support
Compatibility
Programmed for full compatibility with Cisco platforms and MSA-compliant systems, including:
- Cisco Nexus 9000/3000 series (400G ports)
- Cisco ACI and data center switches
- Arista 7800R/7500R series
- NVIDIA/Mellanox Quantum-2 (in Ethernet mode)
- Other QSFP-DD 400G platforms (Juniper, Broadcom-based)
Requires MPO-16 multimode cabling (not included). Need DR4 longer-reach, AOC/DAC options, or bulk quotes? Contact us—we're building the best selection for 400G AI infrastructure.
Frequently Asked Questions
What cable does it need?
A 16-fiber MPO-16 multimode trunk (OM3, OM4 or OM5). It will not mate with the 12-fiber MPO-12 cables used by 40G and 100G SR4 optics.
SR8 or DR4: which do I need?
SR8 is the lower-cost choice for multimode runs up to 100 m inside a data center. DR4 runs up to 500 m over single-mode fiber with an MPO-12/APC connector.
Compatible module or genuine Cisco: what is the difference?
This is a new third-party module programmed (coded) to be recognized by Cisco equipment that calls for this part number, at a fraction of the Cisco-branded price. Choose the genuine Cisco part only if your support contract or internal policy requires Cisco-branded parts.
What warranty and shipping come with it?
Resilient Tec's lifetime warranty. US standard shipping is free with no minimum, and orders typically arrive in 3 to 5 days.
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QDD-400G-DR4-S Cisco Compatible, 400G QSFP-DD DR4 Transceiver
QSFP-DD-400G-CU1M Cisco Compatible, 400G QSFP-DD Passive DAC Cable
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Quick answer: The QDD-400G-SR8-S Cisco-compatible module is a 400GBASE-SR8 QSFP-DD optic that runs 400 Gigabit Ethernet over multimode fiber at 850 nm, up to 70 m on OM3 and 100 m on OM4/OM5, using eight 50G PAM4 lanes on an MPO-16 connector, with DOM. It is coded to work in Cisco switches that call for QDD-400G-SR8-S. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco QDD-400G-SR8-S Compatible 400GBASE-SR8 QSFP-DD PAM4 Optical Transceiver - 100m Reach
This third-party QSFP-DD optical transceiver is fully compatible with Cisco QDD-400G-SR8-S, delivering 400Gbps Ethernet over parallel multimode fiber (MMF) up to 100 meters. Perfect for short-reach, high-density connections in AI/HPC GPU clusters, hyperscale data centers, and spine-leaf architectures where low cost and power efficiency are key.
Built to MSA standards with 8x50G PAM4 parallel lanes, it features an MPO-16 connector and digital diagnostics (DOM). Backed by our lifetime warranty and rigorous testing—get 70-90% savings vs. genuine Cisco OEM with proven reliability.
Key Features
- Massive Cost Savings: Premium compatible optics—scale dense AI networks affordably.
- Plug-and-Play: Hot-pluggable QSFP-DD form factor with pre-programmed EEPROM for seamless Cisco compatibility.
- Short-Reach Efficiency: 100m over OM4/OM5 MMF—ideal for intra-rack or row-level GPU interconnects.
- Lifetime Warranty: Fully tested.
- Use Cases: High-bandwidth links in AI/HPC GPU clusters, data center top-of-rack switches, or multi-node training fabrics.
Technical Specifications
- Data Rate: 400Gbps (400GBASE-SR8, 8x53.125Gbps PAM4)
- Wavelength: 850nm
- Connector: MPO-16 (parallel MMF)
- Reach: Up to 100 meters on OM4/OM5 multimode fiber (70m on OM3)
- Power Consumption: ≤12W
- Operating Temperature: 0°C to 70°C
- Standards Compliance: IEEE 802.3bs, QSFP-DD MSA, CMIS 4.0, RoHS
- Features: Digital Optical Monitoring (DOM/DDM) support
Compatibility
Programmed for full compatibility with Cisco platforms and MSA-compliant systems, including:
- Cisco Nexus 9000/3000 series (400G ports)
- Cisco ACI and data center switches
- Arista 7800R/7500R series
- NVIDIA/Mellanox Quantum-2 (in Ethernet mode)
- Other QSFP-DD 400G platforms (Juniper, Broadcom-based)
Requires MPO-16 multimode cabling (not included). Need DR4 longer-reach, AOC/DAC options, or bulk quotes? Contact us—we're building the best selection for 400G AI infrastructure.
Frequently Asked Questions
What cable does it need?
A 16-fiber MPO-16 multimode trunk (OM3, OM4 or OM5). It will not mate with the 12-fiber MPO-12 cables used by 40G and 100G SR4 optics.
SR8 or DR4: which do I need?
SR8 is the lower-cost choice for multimode runs up to 100 m inside a data center. DR4 runs up to 500 m over single-mode fiber with an MPO-12/APC connector.
Compatible module or genuine Cisco: what is the difference?
This is a new third-party module programmed (coded) to be recognized by Cisco equipment that calls for this part number, at a fraction of the Cisco-branded price. Choose the genuine Cisco part only if your support contract or internal policy requires Cisco-branded parts.
What warranty and shipping come with it?
Resilient Tec's lifetime warranty. US standard shipping is free with no minimum, and orders typically arrive in 3 to 5 days.
You Might Also Need
QDD-400G-DR4-S Cisco Compatible, 400G QSFP-DD DR4 Transceiver
QSFP-DD-400G-CU1M Cisco Compatible, 400G QSFP-DD Passive DAC Cable
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