CBR-DC-PS=: How Does It Deliver Reliable DC Power for Cisco’s Demanding Environments?



​Defining the CBR-DC-PS= Power Supply​

The ​​CBR-DC-PS=​​ is a Cisco-certified ​​direct current (DC) power supply​​ designed for UCS C-Series rack servers, including the ​​C220 M5/M6​​ and ​​C240 M5/M6​​ models. Tailored for environments where AC power is unavailable or unreliable—such as telecom huts, industrial sites, or green energy setups—this unit converts -48V DC input to stable 12V DC output for server operations. Cisco.com emphasizes its role in ensuring uptime in critical infrastructure, particularly in sectors like energy, transportation, and remote edge computing.


​Technical Advantages Over Generic DC Power Solutions​

​Q: Why not use third-party DC power supplies?​
Generic units often lack Cisco’s rigorous validation, leading to risks like:

  • ​Voltage instability​​: Inconsistent output under load spikes, causing server reboots or data corruption.
  • ​Compatibility gaps​​: Firmware mismatches triggering UCS Manager alerts or disabling automated failover.
  • ​Warranty voids​​: Cisco TAC may refuse support if non-certified PSUs are detected.

Key specifications:

  • ​-48V DC input​​: Compatible with telecom and industrial DC power grids.
  • ​94% efficiency​​: Minimizes energy loss in 24/7 operations.
  • ​Hot-swappable design​​: Replace units without downtime in redundant configurations.

​Critical Use Cases for the CBR-DC-PS=​

  • ​5G Edge Nodes​​: Power UCS servers in remote cell towers where AC infrastructure is absent.
  • ​Railway Networks​​: Support real-time signaling systems in trainside data centers with fluctuating power.
  • ​Renewable Energy Sites​​: Integrate with solar/wind DC microgrids for off-grid server deployments.

For example, a European telco reduced outage-related downtime by 80% in 5G edge sites by deploying CBR-DC-PS= units with N+1 redundancy.


​Procuring Genuine Units: Avoiding Counterfeit Risks​

Sourcing authentic CBR-DC-PS= units is non-negotiable for compliance and reliability. [​​“CBR-DC-PS=” link to (https://itmall.sale/product-category/cisco/)​​ offers verified stock with Cisco’s tamper-evident packaging and UID labels.

Key considerations:

  • ​Input validation​​: Confirm facility DC voltage matches the -48V requirement.
  • ​Redundancy planning​​: Deploy dual PSUs for critical workloads.
  • ​Efficiency testing​​: Request efficiency curves to optimize energy use in high-ambient environments.

​A Lesson from the Edge: Why DC Power Matters​

During a hurricane recovery effort, a coastal monitoring station’s AC grid failed, but its UCS C240 M6 servers—powered by ​​CBR-DC-PS= units tied to backup batteries—kept flood sensors online for 72 hours. That event cemented my view: DC isn’t just a fallback; it’s a lifeline. In critical infrastructure, every watt counts, and certified DC PSUs are the difference between resilience and collapse.​

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