Cisco PSU6.3KW-20A-HV=: High-Voltage 6.3kW Power Supply for Hyperscale Data Center and Industrial Networks

​​Product Architecture and Core Functionality​​

The ​​Cisco PSU6.3KW-20A-HV=​​ is a ​​high-voltage, high-efficiency power supply​​ designed for ​​48V DC power distribution​​ in hyperscale data centers, industrial automation, and telecom core networks. Built to support power-hungry infrastructure like ​​Cisco Nexus 92300YC switches​​ and ​​Cisco UCS X-Series servers​​, it addresses the growing energy demands of AI/ML clusters, 400G networking, and edge compute environments. Key innovations include:

• ​​Dual AC/DC Input Flexibility​​: Accepts ​​200–277V AC​​ or ​​380–480V DC​​ inputs with ​​auto-ranging capability​​, ideal for facilities with unstable or mixed power sources.
• ​​Hot-Swap Redundancy​​: ​​N+N modular redundancy​​ in ​​Cisco UCS 5108 Blade Chassis​​, ensuring ​​≤5 ms failover​​ during grid fluctuations.
• ​​Thermal Resilience​​: ​​IP42-rated enclosure​​ with ​​MIL-STD-810G​​ vibration resistance and ​​-40°C to 75°C​​ operational range.

Integrated with ​​Cisco Intersight Power Monitoring​​, the PSU provides real-time analytics for predictive maintenance and energy optimization.

​​Technical Specifications and Certifications​​

Cisco’s 2024 Power Infrastructure Report validates:

• ​​Electrical Performance​​:
  • ​​Input​​: ​​200–277V AC (50/60 Hz)​​ or ​​380–480V DC​​ (±15% tolerance).
  • ​​Output​​: ​​48V DC ±1%​​, ​​131A continuous current​​ (EN 50178).
• ​​Efficiency​​: ​​96% at 50% load​​, meeting ​​80 Plus Titanium​​ and ​​ENERGY STAR 5.0​​ standards.
• ​​Protection Features​​:
  • ​​Over-Temperature Shutdown​​: Activates at ​​85°C internal temperature​​ (IEC 62368-1).
  • ​​Surge Protection​​: ​​6 kV line-to-ground​​ (IEC 61000-4-5).
• ​​Certifications​​: ​​UL 62109​​, ​​NEBS Level 3​​, ​​CE Mark​​, ​​RoHS 3​​.
• ​​Environmental Compliance​​:
  • Operating Humidity: ​​5–95% non-condensing​​ (IEC 60068-2-78).
  • Altitude: ​​4,000 meters​​ (EN 50155).

Lab tests confirmed ​​MTBF of 2.1 million hours​​ under ​​70°C ambient stress​​ and ​​99.999% uptime​​ during ​​30-day load cycling​​.

​​Key Use Cases and Deployment Scenarios​​

​​1. Hyperscale Data Center GPU Clusters​​

A North American cloud provider deployed 150 PSUs to power ​​NVIDIA HGX H100​​ GPU racks, achieving ​​≤1% voltage ripple​​ during ​​10,000A transient loads​​ in AI training workloads.

​​2. Heavy Industrial Automation​​

A German automotive manufacturer used the PSU in ​​Cisco IE 3400 switches​​ within robotic welding cells, surviving ​​20G mechanical shocks​​ and ​​metal particulate exposure​​.

​​3. 5G Core Network Power Resilience​​

An Asian telecom operator integrated the PSU into ​​Cisco NCS 5700 routers​​, ensuring ​​99.999% availability​​ for ​​5G UPF (User Plane Function)​​ during monsoon-season grid instability.

​​Addressing Critical Customer Concerns​​

​​Q: How does it handle voltage sags in regions with unreliable grids?​​

The ​​Active Voltage Regulation (AVR)​​ circuit maintains ​​±0.5% output deviation​​ even during ​​50% voltage sag​​ events (per EN 50160).

​​Q: Is it compatible with lithium-ion battery systems?​​

Yes, via ​​Cisco RSP-7600​​ battery shelves, but requires ​​LiFePO4​​ chemistry for ​​-20°C charging​​ and ​​≥5,000 cycle life​​.

​​Q: What maintenance ensures longevity?​​

• ​​Monthly​​: Inspect ​​DC busbar connections​​ with ​​Cisco CAB-TORQUE-40​​ torque wrench (40 Nm).
• ​​Quarterly​​: Replace ​​fan modules​​ using ​​Cisco FRU-PSU-FAN6.3KW=​​ field-replaceable units.

​​Installation and Optimization Best Practices​​

1. ​​Phase Balancing​​:
   • Distribute PSUs across ​​three-phase circuits​​ to limit ​​neutral current imbalance​​ to ​​≤3%​​ (IEEE 519).
2. ​​Grounding Compliance​​:
   • Use ​​4/0 AWG grounding cables​​ (≤0.05 Ω resistance) bonded to ​​UL 467​​-listed busbars.
3. ​​Firmware Management​​:
   • Update via ​​Cisco UCS Manager​​ to enable ​​Dynamic Power Capping​​ for workload-aware efficiency.

For enterprises migrating from ​​12V systems​​, Cisco offers ​​trade-in rebates covering 25% of costs​​ under its High-Voltage Modernization Program.

​​Why Hyperscalers and Enterprises Standardize on This PSU​​

• ​​Total Cost of Ownership​​: ​​$4,500 per unit​​ (TCO over 10 years), ​​35% lower​​ than HPE/ABB equivalents.
• ​​Compliance​​: Exceeds ​​ANSI/TIA-942 Tier IV​​ and ​​ISO 50001​​ for energy management.
• ​​Future-Proofing​​: Supports ​​800G CPO (Co-Packaged Optics)​​ with ​​≤5% power headroom​​.

For procurement details, visit the Cisco PSU6.3KW-20A-HV= product page at ITMall.sale.

​​Operational Insights from Extreme Environments​​

From Arctic data centers to tropical 5G hubs, two truths prevail:

1. ​​Heat Is the Silent Killer​​: A Saudi Arabian hyperscaler reduced ​​PSU failures​​ by ​​50%​​ after adopting ​​Cisco Intersight​​-driven fan-speed adjustments for ​​55°C ambient temps​​.
2. ​​Grids Will Fail—Plan Accordingly​​: A Chilean mining firm averted ​​$10M in downtime​​ by leveraging the PSU’s ​​480V DC input​​ to bypass unstable AC grids during earthquakes.

In an industry obsessed with computational leaps, the PSU6.3KW-20A-HV= underscores a foundational truth: ​​power integrity is the bedrock of innovation​​. While GPUs and ASICs grab headlines, this PSU’s relentless reliability—whether in a desert sandstorm or a monsoon—fuels the unglamorous, indispensable work of keeping bits flowing. For engineers, it’s a humbling reminder: brilliance means nothing without electrons to power it.