400GBASE-SR4 QSFP-DD 850nm 100m DOM MPO-12/APC MMF Optical Transceiver Module
The 400G QSFP-DD SR4 optical transceiver is engineered to meet the most demanding requirements of today’s hyperscale cloud and enterprise data centers. Featuring the double-density QSFP-DD form factor, this module packs eight 50 Gbps electrical lanes into a single interface, delivering a full 400 Gbps of bidirectional throughput. Using 850 nm VCSEL lasers and MPO-16 connectors over OM3/OM4 multimode fiber, it supports reliable, low-latency links of up to 70 m on OM3 and 100 m on OM4—ideal for top-of-rack (ToR) uplinks, spine-leaf fabrics, and high-performance computing (HPC) clusters.
Certified to IEEE 802.3bs and CMIS standards and tested for interoperability with leading switch vendors—including Cisco®, Arista®, Juniper®, HPE®, and Dell EMC®—the Fibrecross 400G QSFP-DD SR4 delivers effortless plug-and-play deployment in mixed-vendor environments.
| Part Number | GL4H-QDMM85SR4C | Tx Power (dBm) | -4.6~4 |
| Product | 400G QSFP-DD SR4 | Rx Power (dBm) | -6.4 |
| Max Data Rate | 425Gbps | Distance | 60m OM3 / 100m OM4 |
| Wavelength | 850nm | Connector | MPO-12/APC |
| Laser Type (TX/RX) | VCSEL/PIN | Temp | 0~70°C |
Top-of-Rack (ToR) Switch Uplinks
Spine-Leaf Data Center Fabrics
High-Performance Computing (HPC) Clusters
AI/ML Training Nodes
Hyperscale Cloud Environments
Network Aggregation & Core Layers
- High Data Rate: Up to 400 Gbps aggregated throughput via eight electrical lanes at 50 Gbps each.
- Short-Reach SR4 Interface: Four parallel optical lanes over OM4 (100 m) or OM3 (70 m) fiber.
- QSFP-DD Form Factor: Double-density QSFP footprint for enhanced port density.
- Low Power Consumption: <10 W per module to reduce cooling and power costs.
- RoHS & CE/FCC Compliance: Meets international environmental and safety standards.
- Digital Diagnostic Monitoring (DDM): Real-time monitoring of optical power, temperature, and voltage.
- Compatibility: The QSFP-DD interface is backward compatible with QSFP56, allowing users to easily upgrade existing equipment to support higher transmission rates.
Benefits for Data Center & Cloud Networks
High Port Density: QSFP-DD form factor doubles port count on switches and servers without increasing rack space.
Future-Proof Architecture: Supports IEEE 802.3bs and CMIS for seamless interoperability with next-generation 400G/800G switches.
Energy Efficiency: Low-power design minimizes operating expenses (OPEX) and carbon footprint.
Scalable Performance: Ideal for spine-leaf, leaf-ToR, and inter-rack connections in modern cloud infrastructures.
Reliable Monitoring: DDM provides continuous insight into link health, reducing downtime and maintenance.
Installation & Compliance
Hot-Plug Design: Enables live deployment and removal without powering down equipment.
Safety Standards: Certified under UL, CE, and FCC guidelines for electrical and laser safety.
Environmental Regulations: Fully RoHS-compliant, supporting green initiatives in data centers.
FAQ About 400G QSFP-DD SR4 Optical Transceiver
Fibrecross 400G QSFP-DD SR4 Optical transceivers are rigorously tested for compatibility with major switch and router brands, including Cisco®, Arista®, Juniper®, HPE®, and Dell EMC®. Compliant with IEEE 802.3bs and CMIS standards, they ensure plug-and-play operation across multi-vendor networks.
QSFP-DD (Double Density) provides 8 electrical lanes at 50 Gbps each (total 400 Gbps), while QSFP56 uses 4 lanes at 100 Gbps each. QSFP-DD modules double port density compared to QSFP56.
To ensure plug-and-play interoperability, confirm that your switch firmware supports IEEE 802.3bs and CMIS. Fibrecross QSFP-DD SR4 modules undergo interoperability testing with Cisco Nexus, Arista 7060, and other leading switch platforms.
The 400G QSFP-DD SR4 supports up to 70 m over OM3 and up to 100 m over OM4 multimode fiber, making it a versatile short-reach solution for ToR uplinks and spine-leaf fabrics.
Always use an MPO-16–specific cleaning tool and a lint-free wipe with 99% isopropyl alcohol. Regular cleaning of the connector endface prevents insertion loss and maintains optimal performance of your 400G SR4 fiber links.
Yes. The low-latency, high-throughput design of our 400G QSFP-DD SR4 transceiver makes it ideal for HPC cluster interconnects, AI/ML training nodes, and other compute-intensive applications requiring reliable short-reach optics.
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Why Choose Fibrecross?
With a proven track record in optical interconnect solutions, Fibrecross delivers high-performance, cost-effective transceivers backed by exceptional technical support. Optimize your network’s throughput, reliability, and scalability with our 400G QSFP-DD SR4 modules today.