Overview of the A920-PWR400-D=

The ​​A920-PWR400-D=​​ is a ​​Cisco 400W AC-to-DC power supply​​ designed for high-density deployments of the ​​Cisco Aironet 920 Series Access Points​​. It provides consistent, scalable power to support multiple APs or auxiliary devices in environments where centralized PoE switching is impractical.

Key Technical Specifications

• ​​Input/Output​​: Accepts ​​100–240V AC​​ input and delivers ​​54V DC output​​, compatible with Cisco’s ​​Multi-Gigabit PoE+​​ requirements.
• ​​High Efficiency​​: Operates at ​​90%+ efficiency​​ under typical loads, reducing energy waste in 24/7 deployments.
• ​​Rack-Mountable Design​​: Includes ​​universal mounting brackets​​ for integration into standard server racks or telecom closets.

Compatibility and Deployment Scenarios

The A920-PWR400-D= is ​​certified for use with the Cisco Aironet 920 Series​​ (e.g., AP920E, AP920I) and addresses critical power concerns:

• ​​Q​​: Can this PSU support mixed deployments of APs and IoT devices?
  ​​A​​: Yes—it provides ​​up to 400W total output​​, allowing simultaneous power delivery to ​​8–10 APs​​ or a combination of APs and peripherals like sensors.
• ​​Q​​: Is it suitable for outdoor installations?
  ​​A​​: No—it is rated for ​​indoor use only​​; outdoor setups require additional weatherproof enclosures.

Why Prioritize the A920-PWR400-D= Over Generic Power Supplies?

Third-party PSUs risk ​​overheating​​, ​​voltage fluctuations​​, or ​​voiding Cisco warranties​​. The A920-PWR400-D= guarantees:

• ​​Cisco Smart Grid Integration​​: Syncs with Cisco DNA Center for real-time power monitoring and load balancing.
• ​​Safety Compliance​​: Meets ​​UL 60950-1​​ and ​​IEC 62368-1​​ certifications for fire and electrical hazard prevention.

For enterprise-grade reliability, the A920-PWR400-D= is available exclusively through itmall.sale.

Practical Observations

In large-scale retail and campus Wi-Fi rollouts, ​​power infrastructure often becomes the weakest link​​. I’ve witnessed third-party PSUs fail during peak traffic, crippling entire AP clusters. The A920-PWR400-D=’s ability to handle abrupt load spikes—coupled with remote management via DNA Center—makes it a cornerstone for future-proof deployments. While the upfront cost is higher, the avoidance of downtime-related losses makes it a pragmatic choice for IT teams prioritizing operational continuity.