Cisco PSU3.2KW-DCPI=: High-Efficiency 3.2kW DC Power Supply for Data Center and Enterprise Networks

​​Product Architecture and Core Functionality​​

The ​​Cisco PSU3.2KW-DCPI=​​ is a ​​3.2-kilowatt 48V DC power supply​​ engineered for high-density data center switches, routers, and converged infrastructure platforms like the ​​Cisco Nexus 9500 Series​​ and ​​Cisco UCS C4800 ML​​. Designed to meet the escalating power demands of modern AI/ML workloads and 400G networking, it features:

• ​​Dual-Input Redundancy​​: Accepts ​​200–240V AC​​ or ​​-48V DC​​ inputs with automatic failover (≤10 ms switchover).
• ​​High Efficiency​​: ​​94% efficiency​​ at 50% load, compliant with ​​80 Plus Platinum​​ and ​​ENERGY STAR 4.0​​.
• ​​Scalable Power Delivery​​: ​​N+1 redundancy​​ support in ​​Cisco UCS 5108 Blade Server Chassis​​, enabling ​​≤1% voltage ripple​​ under full load.

The PSU integrates with ​​Cisco Intersight​​ for real-time power telemetry and predictive failure analysis, critical for hyperscale environments.

​​Technical Specifications and Certifications​​

Cisco’s 2024 Power Systems Validation Report highlights:

• ​​Electrical Performance​​:
  • ​​Input​​: ​​200–240V AC (50/60 Hz)​​ or ​​-48V DC​​ (±20% tolerance).
  • ​​Output​​: ​​48V DC ±1%​​, ​​66.7A​​ continuous current (IEC 62368-1).
• ​​Protection Mechanisms​​:
  • ​​Over-Current Protection (OCP)​​: ​​72A​​ threshold with ​​<100 μs​​ response.
  • ​​Thermal Management​​: ​​Dual ball-bearing fans​​ with ​​N+1 redundancy​​, maintaining ​​≤55°C​​ internal temps.
• ​​Certifications​​: ​​UL 60950-1​​, ​​NEBS Level 3​​, ​​CE Mark​​, and ​​RoHS 3​​.
• ​​Environmental Compliance​​:
  • Operating Temperature: ​​0°C to 55°C​​ (ASHRAE Class A4).
  • Altitude: ​​3,000 meters​​ (EN 50155).

Lab tests achieved ​​MTBF (Mean Time Between Failures) of 1.8 million hours​​ under ​​55°C ambient stress​​.

​​Key Use Cases and Deployment Scenarios​​

​​1. Hyperscale Data Center Spine-Leaf Fabrics​​

A European cloud provider deployed 200 PSUs in ​​Nexus 9336C-FX2​​ spines to support ​​400G-ZR​​ optics, reducing energy costs by ​​18%​​ versus older 2.5kW units.

​​2. AI/ML GPU Cluster Power Distribution​​

A tech giant used the PSU to power ​​NVIDIA DGX A100​​ clusters via ​​Cisco UCS C4800​​, achieving ​​≤0.5% voltage deviation​​ during ​​5,000A transient spikes​​.

​​3. Telecom Core Network Modernization​​

An Asian carrier integrated the PSU into ​​Cisco NCS 5500 Series​​ routers, supporting ​​10 kW per rack​​ density for 5G UPF (User Plane Function) workloads.

​​Addressing Critical Customer Concerns​​

​​Q: How does it handle input voltage fluctuations in unstable grids?​​

The ​​Active Harmonic Correction (AHC)​​ circuit maintains ​​THD (Total Harmonic Distortion) ≤5%​​ even at ​​180V AC input​​, complying with ​​EN 61000-3-2​​.

​​Q: Can it support lithium-ion battery backups?​​

Yes, via ​​Cisco RSP-7700​​ battery shelves, but requires ​​LiFePO4 chemistry​​ for ​​-10°C charging​​ compatibility.

​​Q: What maintenance is required?​​

• ​​Quarterly​​: Clean ​​fan filters​​ with ​​Cisco CAB-CLN-FAN​​ tools to prevent ​​≥10% airflow reduction​​.
• ​​Biannual​​: Test ​​hold-up time​​ (>20 ms per EN 61000-4-11) using ​​Cisco PWR-TESTER-3KW=​​.

​​Installation and Optimization Guidelines​​

1. ​​Rack Power Balancing​​:
   • Distribute PSUs across ​​three-phase circuits​​ to limit ​​phase imbalance​​ to ​​≤5%​​ (IEC 60439).
2. ​​Grounding Compliance​​:
   • Use ​​6 AWG grounding cables​​ (≤0.1 Ω resistance) bonded to ​​EN 50174-2​​ compliant busbars.
3. ​​Firmware Updates​​:
   • Upgrade via ​​Cisco UCS Manager​​ to enable ​​Adaptive Voltage Scaling (AVS)​​ for dynamic load adjustments.

For enterprises migrating from ​​AC-only​​ systems, Cisco offers ​​trade-in rebates covering 20% of costs​​ under its DC Power Modernization Initiative.

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

• ​​Total Cost of Ownership​​: ​​$2,800 per unit​​ (TCO over 7 years), ​​25% lower​​ than HPE/Delta equivalents.
• ​​Compliance​​: Meets ​​ANSI/TIA-942 Tier IV​​ and ​​EU Code of Conduct 2024​​ for data center efficiency.
• ​​Future-Proofing​​: Supports ​​800G optics​​ via ​​Cisco QSFP-DD-800G​​ with ​​≤3% power overhead​​.

For purchasing details, visit the Cisco PSU3.2KW-DCPI= product page at ITMall.sale.

​​Operational Insights from Mission-Critical Deployments​​

Two lessons dominate global deployments:

1. ​​Dust Kills Efficiency​​: A Middle Eastern hyperscaler reduced ​​PSU failures​​ by ​​40%​​ after enforcing ​​biweekly filter cleaning​​—proving that even platinum-rated efficiency falters without airflow.
2. ​​Transients Are Inevitable​​: A Wall Street firm eliminated ​​GPU cluster reboots​​ by leveraging the PSU’s ​​AVS​​ to absorb ​​7,000A transients​​ during algorithmic trading surges.

In an era where every watt and volt dictates competitive advantage, the PSU3.2KW-DCPI= isn’t just a component—it’s the unsung hero of digital transformation. While engineers obsess over flops and packets, this PSU quietly ensures the electrons fueling progress arrive precisely when and where needed. The lesson? In infrastructure, reliability isn’t glamorous—until it’s gone. And when uptime is measured in nines, even a flicker matters.