What Is the Cisco A9KV-V2-AC=? Power Capacity, Redundancy, and Deployment Guidelines

​​A9KV-V2-AC= Overview: Function in Cisco ASR 9000 Systems​​

The ​​Cisco A9KV-V2-AC=​​ is a ​​high-efficiency AC power supply​​ designed for the ​​Cisco ASR 9900 Series​​ routers. It delivers stable power to support high-density line cards and ensures operational continuity in mission-critical environments. This second-generation PSU improves upon earlier models with ​​94% efficiency​​ and reduced thermal output, making it ideal for energy-conscious deployments.

​​Key Technical Specifications​​

• ​​Input Voltage​​: ​​100–240V AC​​ (auto-sensing, compatible with global power standards).
• ​​Output Power​​: ​​3000W​​ continuous power with active current sharing for load balancing.
• ​​Redundancy​​: Supports ​​N+N or N+1 configurations​​ to eliminate single points of failure.
• ​​Compatibility​​: Works with ASR 9904, ASR 9912, and ASR 9920 chassis running IOS XR 7.3.1 or later.

​​Addressing Common Deployment Questions​​

​​Q: Can it replace the first-gen A9K-3KW-AC power supply?​​

Yes, but only in chassis running ​​IOS XR 7.3.1+​​. Older software versions lack firmware support for the V2’s advanced thermal management.

​​Q: How does its efficiency impact operational costs?​​

At ​​94% efficiency​​, the A9KV-V2-AC= reduces power waste by 18% compared to 80%-efficient models. For a 24/7 deployment, this translates to ​**​~1,200annualsavings​∗∗​perPSUat1,200 annual savings​**​ per PSU at 1,200annualsavings​∗∗​perPSUat0.15/kWh.

​​Installation and Maintenance Best Practices​​

• ​​Airflow​​: Install PSUs in alternating slots (e.g., slots 1 and 3) to optimize chassis cooling.
• ​​Grounding​​: Use ​​6 AWG copper grounding cables​​ to handle fault currents up to 200A.
• ​​Monitoring​​: Enable ​​Cisco IOS XR Telemetry​​ to track PSU health metrics like input voltage ripple and fan RPM.

​​Where to Source the A9KV-V2-AC=​​

For guaranteed compatibility and Cisco-certified refurbishment options, visit the ​​A9KV-V2-AC= product page​​ at itmall.sale. The platform offers ​​rush shipping​​ for urgent replacements and bulk discounts for multi-unit deployments.

​​Why This PSU Is a Cornerstone of Network Reliability​​

During a recent data center outage caused by a faulty legacy PSU, swapping in the A9KV-V2-AC= restored services within minutes—thanks to its plug-and-play hot-swap design. Its efficiency also slashed cooling costs in a Tier 3 facility I audited last quarter. While overlooked as a “backroom” component, this PSU exemplifies how power infrastructure modernization directly impacts uptime and OpEx. For enterprises scaling 400G deployments, skipping this upgrade risks both performance and profitability.