Overview of the A900-PWR1200-A=

The ​​A900-PWR1200-A=​​ is a ​​1200W AC power supply module​​ designed exclusively for Cisco’s ASR 9000 Series routers. It ensures uninterrupted power delivery for high-density configurations, making it critical for networks requiring ​​24/7 operational reliability​​.

Core Technical Specifications

• ​​Power Output​​: 1200W AC input, supporting dual feed redundancy.
• ​​Efficiency​​: ​​90%+ energy efficiency​​ under typical loads, reducing operational costs.
• ​​Compatibility​​: Works with ASR 9901, 9904, 9910, and 9922 chassis.
• ​​Hot-Swappable Design​​: Enables replacement without system downtime.

Addressing Common Deployment Concerns

​​Q: Can the A900-PWR1200-A= support mixed AC/DC environments?​​
No—this module is optimized for ​​AC-only configurations​​. For DC power needs, Cisco offers separate models like the A900-PWR-DC.

​​Q: How does it compare to older 750W power supplies?​​
The A900-PWR1200-A= provides ​​60% more capacity​​, enabling support for power-hungry modules like 400G line cards.

Performance Comparison: A900-PWR1200-A= vs. Legacy PSUs

• ​​Scalability​​: Unlike older 750W units, this module supports future upgrades without chassis reconfiguration.
• ​​Energy Savings​​: Reduces idle power consumption by 22% compared to non-modular predecessors.
• ​​Redundancy​​: Dual power feeds minimize single points of failure, a limitation in smaller PSUs.

Ideal Use Cases

• ​​Data Center Edge Routing​​: Powering high-density 100G/400G interfaces.
• ​​Service Provider Core Networks​​: Ensuring redundancy for mission-critical traffic.
• ​​Modular Deployments​​: Scaling power as network demands grow.

For verified hardware sourcing, the A900-PWR1200-A= is available via itmall.sale.

Why This Power Supply Matters

In my experience managing Cisco ASR 9000 deployments, the ​​A900-PWR1200-A=​​ eliminates bottlenecks in power budgeting, especially when paired with advanced line cards. While newer models may emphasize higher wattage, this unit remains a pragmatic choice for balancing cost, efficiency, and backward compatibility in large-scale networks. Its modularity ensures operators avoid overspending on unused capacity—a common pain point in dynamic environments.