QDD-400G-DR4-S Cisco Compatible 400GBASE-DR4 QSFP-DD PAM4 Transceiver - 500m
Warranty: Lifetime
Quick answer: The QDD-400G-DR4-S Cisco-compatible module is a 400GBASE-DR4 QSFP-DD optic that runs 400 Gigabit Ethernet up to 500 m over single-mode fiber at 1310 nm, using four 100G PAM4 lanes on an MPO-12/APC connector, with DOM. It is coded to work in Cisco switches that call for QDD-400G-DR4-S. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco QDD-400G-DR4-S Compatible 400GBASE-DR4 QSFP-DD PAM4 Optical Transceiver - 500m Reach
This third-party QSFP-DD optical transceiver is fully compatible with Cisco QDD-400G-DR4-S, delivering 400Gbps Ethernet over parallel single-mode fiber (SMF) up to 500 meters. Ideal for high-bandwidth data center interconnects, AI/HPC spine-leaf architectures, and hyperscale networks requiring longer reaches beyond copper/DAC limits.
Built to MSA standards with 4x100G PAM4 modulation, it features an MPO-12/APC connector and digital diagnostics (DOM). Backed by our lifetime warranty and rigorous testing—enjoy 70-90% savings vs. genuine Cisco OEM while ensuring reliable, high-performance optics.
Key Features
- Massive Cost Savings: Premium compatible optics at a fraction of OEM pricing—scale AI and data center networks affordably.
- Plug-and-Play: Hot-pluggable QSFP-DD form factor with pre-programmed EEPROM for seamless Cisco compatibility.
- Extended Reach: 500m over parallel SMF—perfect complement to short-reach SR8 or DACs.
- Lifetime Warranty: Fully tested.
- Use Cases: Spine-leaf links in large AI clusters, data center interconnections (DCI), or high-throughput storage fabrics.
Technical Specifications
- Data Rate: 400Gbps (400GBASE-DR4, 4x106.25Gbps PAM4)
- Wavelength: 1310nm
- Connector: MPO-12/APC (parallel SMF)
- Reach: Up to 500 meters on single-mode fiber
- 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
- Juniper QFX5700 and other QSFP-DD platforms
- NVIDIA/Mellanox (in Ethernet mode) and Broadcom-based systems
Requires MPO-12 parallel SMF cabling (not included). Need FR4 longer-reach, breakout options, or bulk quotes? Contact us—we're experts in 400G optics for AI workloads.
Frequently Asked Questions
What cable does it need?
A single-mode (OS2) MPO-12 trunk with angle-polished (APC) endfaces. Multimode or flat-polished (UPC) MPO cables will not work.
Can it break out to 4 x 100G?
Yes, on switches that support breakout: an MPO to 4 x duplex LC breakout cable connects one DR4 port to four 100G single-lane (DR) optics.
DR4 or SR8: which do I need?
SR8 runs over multimode fiber up to 100 m with an MPO-16 connector. DR4 runs over single-mode fiber up to 500 m with MPO-12/APC, which suits longer runs between rows.
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
MPO-12/APC OS2 single-mode trunk cable
QDD-400G-SR8-S Cisco Compatible, 400G QSFP-DD SR8 Transceiver
QSFP-DD-400G-CU1M Cisco Compatible, 400G QSFP-DD Passive DAC Cable
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Quick answer: The QDD-400G-DR4-S Cisco-compatible module is a 400GBASE-DR4 QSFP-DD optic that runs 400 Gigabit Ethernet up to 500 m over single-mode fiber at 1310 nm, using four 100G PAM4 lanes on an MPO-12/APC connector, with DOM. It is coded to work in Cisco switches that call for QDD-400G-DR4-S. Resilient Tec sells it new, with a lifetime warranty and free US shipping from Knoxville, TN.
Cisco QDD-400G-DR4-S Compatible 400GBASE-DR4 QSFP-DD PAM4 Optical Transceiver - 500m Reach
This third-party QSFP-DD optical transceiver is fully compatible with Cisco QDD-400G-DR4-S, delivering 400Gbps Ethernet over parallel single-mode fiber (SMF) up to 500 meters. Ideal for high-bandwidth data center interconnects, AI/HPC spine-leaf architectures, and hyperscale networks requiring longer reaches beyond copper/DAC limits.
Built to MSA standards with 4x100G PAM4 modulation, it features an MPO-12/APC connector and digital diagnostics (DOM). Backed by our lifetime warranty and rigorous testing—enjoy 70-90% savings vs. genuine Cisco OEM while ensuring reliable, high-performance optics.
Key Features
- Massive Cost Savings: Premium compatible optics at a fraction of OEM pricing—scale AI and data center networks affordably.
- Plug-and-Play: Hot-pluggable QSFP-DD form factor with pre-programmed EEPROM for seamless Cisco compatibility.
- Extended Reach: 500m over parallel SMF—perfect complement to short-reach SR8 or DACs.
- Lifetime Warranty: Fully tested.
- Use Cases: Spine-leaf links in large AI clusters, data center interconnections (DCI), or high-throughput storage fabrics.
Technical Specifications
- Data Rate: 400Gbps (400GBASE-DR4, 4x106.25Gbps PAM4)
- Wavelength: 1310nm
- Connector: MPO-12/APC (parallel SMF)
- Reach: Up to 500 meters on single-mode fiber
- 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
- Juniper QFX5700 and other QSFP-DD platforms
- NVIDIA/Mellanox (in Ethernet mode) and Broadcom-based systems
Requires MPO-12 parallel SMF cabling (not included). Need FR4 longer-reach, breakout options, or bulk quotes? Contact us—we're experts in 400G optics for AI workloads.
Frequently Asked Questions
What cable does it need?
A single-mode (OS2) MPO-12 trunk with angle-polished (APC) endfaces. Multimode or flat-polished (UPC) MPO cables will not work.
Can it break out to 4 x 100G?
Yes, on switches that support breakout: an MPO to 4 x duplex LC breakout cable connects one DR4 port to four 100G single-lane (DR) optics.
DR4 or SR8: which do I need?
SR8 runs over multimode fiber up to 100 m with an MPO-16 connector. DR4 runs over single-mode fiber up to 500 m with MPO-12/APC, which suits longer runs between rows.
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
MPO-12/APC OS2 single-mode trunk cable
QDD-400G-SR8-S Cisco Compatible, 400G QSFP-DD SR8 Transceiver
QSFP-DD-400G-CU1M Cisco Compatible, 400G QSFP-DD Passive DAC Cable
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