Arista PWR-721-DC-RED | 720XP 700W DC Power Supply, Front-to-Rear Airflow

Q: Which Arista switches are compatible with the PWR-721-DC-RED?
A: This power supply is designed for Arista 720XP 1RU switches, including models 720XP-48Y6 and 720XP-24Y6. It supports N+1 redundant power configurations and should be installed in power supply bay #1 if only one unit is used.

Q: What is the difference between PWR-721-DC-RED and PWR-521-DC-RED?
A: The PWR-721-DC-RED provides 700W of output power, while the PWR-521-DC-RED delivers 500W. Both are DC power supplies for 720XP switches with front-to-rear airflow, but the 700W model supports higher PoE budgets and more demanding configurations.

Q: Can I mix AC and DC power supplies in the same 720XP switch?
A: While the 720XP switches support both AC and DC power supplies, it is recommended to use matching power supply types for optimal redundancy and load-sharing performance. Consult Arista documentation for specific deployment scenarios.

Q: What airflow direction does the red handle indicate?
A: The red handle on Arista power supplies indicates front-to-rear airflow. This must match the airflow direction of your fan modules and chassis configuration to ensure proper cooling.

Q: Is this a spare or configurable power supply?
A: The PWR-721-DC-RED is designated as a spare power supply, typically ordered for adding redundancy to existing 720XP switches or as a field replacement unit.