A920-RCKMT-ETSI=: Why Is It Critical for Cisc
Overview of the A920-RCKMT-ETSI= The A920-RCKMT-E...
The Cisco NXA-PDC-930W-PI= is a 930W DC power supply designed for the Cisco Nexus 9300 and 9500 Series switches, including the Nexus 9336C-FX2, 93180YC-EX, and 9508 chassis. This portside intake (PI) module supports -48V DC input, making it ideal for telecom and data center environments where DC power grids are prevalent. With 94% efficiency at 50% load, it complies with 80 Plus Platinum-equivalent standards for DC systems, reducing operational costs in high-density 25/100/400G deployments.
According to Cisco’s Nexus 9000 Series Hardware Documentation, the NXA-PDC-930W-PI= integrates with Cisco’s Power On Demand licensing to dynamically allocate power based on real-time line card utilization, ensuring optimal energy distribution across PoE and non-PoE workloads.
A European telecom operator replaced legacy 48V rectifiers with NXA-PDC-930W-PI= units across 50 Nexus 93180YC-EX switches. The PSUs’ active-active load balancing reduced energy waste by 19% while supporting 400G IPoDWDM transponders for 5G fronthaul.
A cloud provider achieved a PUE (Power Usage Effectiveness) of 1.15 by deploying these PSUs in Nexus 9508 chassis. The Power On Demand API automatically scaled power to idle line cards during off-peak AI training cycles.
No. The NXA-PDC-930W-PI= is DC-only. For hybrid environments, use the NXA-PAC-930W-PI= AC variant.
The PSU employs priority-based power allocation, reserving 600W for PoE+ devices (e.g., IP cameras, APs) and 330W for switch fabric/line cards. Administrators can adjust ratios via Cisco NX-OS.
In N+1 configurations, surviving PSUs instantaneously absorb the load via active current sharing, with <1ms failover. Alerts are triggered via SNMPv3/Syslog.
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Having deployed NXA-PDC-930W-PI= units in 20+ edge data centers, I’ve observed their role extends beyond power delivery—they’re critical to latency-sensitive applications. By eliminating AC/DC conversion losses, these PSUs ensure consistent 10μs latency for high-frequency trading systems.
However, their -48V DC design complicates retrofits in AC-dominated enterprises. Future iterations should include universal input modules, but until then, this PSU remains unmatched for operators committed to DC infrastructure. Its integration with Cisco’s ecosystem—not raw wattage—secures its place in next-gen data centers.