What Is the Cisco A99-PS-F-FLR=? Redundant Power Design, Compatibility, and Use Cases

​​Product Overview and Primary Role​​

The ​​Cisco A99-PS-F-FLR=​​ is a ​​field-replaceable power supply module​​ designed for high-availability network environments. It provides ​​N+1 redundancy​​ and ​​hot-swappable functionality​​, ensuring uninterrupted operation for critical Cisco chassis systems like the ​​Catalyst 9400​​ or ​​Nexus 9500​​ series.

​​Technical Specifications and Key Features​​

• ​​Power Capacity​​: Delivers ​​3000W​​ output with ​​AC/DC dual-mode support​​, compatible with 110V-240V input ranges.
• ​​Redundancy Protocol​​: Integrates with Cisco’s ​​Power Supply Redundancy Manager (PSRM)​​ for automatic failover during primary PSU faults.
• ​​Modular Design​​: ​​Hot-swappable trays​​ minimize downtime during replacements or upgrades.
• ​​Environmental Tolerance​​: Operates in ​​-40°C to 70°C​​ ranges, suitable for industrial or edge deployments.

​​Addressing Core User Concerns​​

​​1. How does the “FLR” designation impact deployment?​​

The ​​FLR (Field-Replaceable)​​ feature allows technicians to swap the module without shutting down the chassis, critical for ​​24/7 data centers​​ or ​​service provider networks​​.

​​2. Is this PSU compatible with mixed AC/DC power sources?​​

Yes. The ​​A99-PS-F-FLR=​​ supports ​​simultaneous AC and DC inputs​​, enabling hybrid power grids for facilities transitioning to renewable energy sources.

​​3. What chassis platforms are supported?​​

This module is validated for ​​Catalyst 9400​​, ​​Nexus 9500​​, and ​​ASR 9900​​ series. Verify firmware compatibility (e.g., ​​IOS-XE 17.6+​​) before installation.

​​Procurement and Validation​​

For guaranteed compatibility, “A99-PS-F-FLR=” is available here. Ensure the supplier provides ​​Cisco’s Power Validation Report​​ to confirm alignment with your chassis’s load requirements.

​​Operational Insights​​

While the ​​A99-PS-F-FLR=​​ excels in legacy high-end chassis, newer platforms like the ​​Catalyst 9600​​ or ​​Nexus 9236C​​ increasingly adopt modular ​​Rectifier Shelf (RS)​​ designs for centralized power distribution. For enterprises standardized on Catalyst 9400 or Nexus 9500, however, this PSU remains indispensable—especially in edge sites lacking stable power infrastructure. Just factor in the ​​2RU space per module​​ when planning rack density.