​​Functional Overview and Target Applications​​

The Cisco PSU4.3KW-HVPI= is a ​​4.3-kilowatt hot-swappable power supply​​ engineered for high-density data center and enterprise environments. Designed to support Cisco Nexus 9000 Series switches and UCS B-Series Blade Servers, it provides ​​N+1 redundancy​​ and operates at ​​240V AC high-voltage input​​, making it ideal for:

• ​​AI/ML Workloads​​: Powering GPU/TPU clusters in hyperscale data centers
• ​​5G Core Networks​​: Ensuring uptime for high-throughput routers and switches
• ​​High-Performance Compute (HPC)​​: Delivering stable power to UCS C480 ML servers

​​Technical Specifications and Compliance​​

• ​​Input Voltage​​: 200–277V AC (50/60Hz)
• ​​Efficiency​​: 94% at 50% load (80 PLUS Platinum equivalent)
• ​​Output​​: 12V DC rail with ​​360A max current​​
• ​​Compliance​​:
  • ​​IEC 62368-1​​ (Safety standards)
  • ​​NEBS Level 3​​ (GR-63-CORE seismic/vibration)
  • ​​ENERGY STAR 3.0​​
• ​​Environmental​​:
  • Operating Temperature: 0°C to 45°C (derate 2% per °C above 40°C)
  • Altitude: Up to 3,000 meters

​​Compatibility and Integration​​

​​Supported Cisco Platforms​​

• ​​Switches​​: Nexus 9504/9508 with N9K-PUV4 chassis
• ​​Servers​​: UCS B200 M6 Blade, UCS C480 ML (requires UCSB-PSU-4KW adapter)
• ​​Routers​​: ASR 9904 with A9K-PWR-4KW module

​​Third-Party Validation​​

• ​​NVIDIA DGX A100​​: Validated for 48V DC busbar integration
• ​​Schneider APC Smart-UPS​​: Compatible with 208V PDUs via CAB-HVDC-208V=

​​Installation and Redundancy Configuration​​

​​Step-by-Step Deployment​​

1. ​​Safety Precautions​​: Lock out upstream circuit breakers per NFPA 70E.
2. ​​Mounting​​: Slide PSU into chassis slot until latch engages (audible click).
3. ​​Redundancy​​: Configure N+1 mode via Cisco UCS Manager or NX-OS CLI:

   power redundancy-mode combined  
   power supply 1 priority primary  

​​Thermal Management​​

• Maintain ≥5cm clearance between PSUs for airflow.
• Monitor via show environment power (alarm threshold: 50°C).

​​Performance Benchmarks​​

​​Data Center Efficiency Gains​​
A Tier IV facility reduced PUE from ​​1.45 to 1.18​​ by:

• Deploying 24x PSU4.3KW-HVPI= in Nexus 9508 chassis
• Leveraging ​​dynamic power sharing​​ during load spikes
• Achieving ​​99.999% uptime​​ over 18 months

​​Power Utilization Metrics​​

​​Addressing Critical Deployment Concerns​​

​​Q: How does it handle voltage fluctuations?​​

• ​​Voltage Ride-Through​​: Maintains output for 20ms during 50% voltage sag.
• ​​Surge Protection​​: 6kV line-to-ground per IEC 61000-4-5.

​​Q: Can it operate in mixed-voltage environments?​​

• ​​Yes​​, with CAB-HVDC-208V= adapter for 208V PDUs.
• ​​Derating​​: Max output reduces to 3.8KW at 208V.

​​Q: Maintenance best practices?​​

• ​​Fan Replacement​​: Every 5 years (Cisco PSU-FAN-4KW= kit).
• ​​Capacitor Health Check​​: Use show power supply detail to monitor ESR.

​​Lifecycle Management​​

​​Firmware Updates​​

• ​​NX-OS​​: 10.2(3)F+ for adaptive current sharing.
• ​​UCS Manager​​: 4.2(3c)+ for predictive failure analytics.

​​End-of-Life Strategy​​

• ​​Last RMA Date​​: Q2 2031 (Cisco EOL Notice #7842).
• ​​Recycling​​: Separate aluminum heatsinks from PCB per R2v3.

​​Operational Insights from Financial Sector Deployments​​
In trading data centers, the PSU4.3KW-HVPI=’s ​​2ms failover​​ during grid fluctuations prevented 2.8Minpotentiallossesduringpeakvolatility.While48VDCgainstraction,its​∗∗​adaptiveAC/DCbus​∗∗​enabledseamlessintegrationwithlegacyUPSsystems—avoiding2.8M in potential losses during peak volatility. While 48V DC gains traction, its ​**​adaptive AC/DC bus​**​ enabled seamless integration with legacy UPS systems—avoiding 2.8Minpotentiallossesduringpeakvolatility.While48VDCgainstraction,its​∗∗​adaptiveAC/DCbus​∗∗​enabledseamlessintegrationwithlegacyUPSsystems—avoiding600k in infrastructure upgrades. The unanticipated benefit? Its ​​harmonic distortion <5%​​ eliminated the need for external filters in sensitive algo-trading setups.

For procurement and technical validation: [“PSU4.3KW-HVPI=” link to (https://itmall.sale/product-category/cisco/).