Keep EX4400 infrastructure running with a 550 W DC power supply designed for ORV3 deployments. Built for Juniper switching environments that demand dependable power delivery, this PSU supports the operational continuity expected in enterprise access and aggregation layers. Its DC input design fits environments where centralized power architecture is already in place, making it a practical choice for data centers and network rooms that standardize on DC distribution. For teams maintaining high-density switch stacks, a dedicated replacement PSU helps reduce downtime risk and keeps service windows controlled. This module is intended for organizations that value predictable maintenance, platform compatibility, and clean spare-part strategy. Rather than overbuying capacity or adapting a generic replacement, you get a power supply aligned to the EX4400 ORV3 platform and its electrical requirements. That specificity matters when uptime, serviceability, and rack consistency are part of the procurement decision.