APC 9000 Switched, ZeroU, 20A, 208V, (21) C13/C15 & (3) C19/C21, L620 Cord Rack Power Distribution Unit

Overview

The APC APDU9959NA3 is a switched rack power distribution unit designed to deliver precise and remotely managed power to a full rack of servers and networking equipment without occupying any horizontal rack space. It operates in 208-volt environments and mounts vertically on the rear or side of APC NetShelter enclosures, allowing quick installation without tools. With a capacity of 3300 VA and a 16 A line rating, it supports a variety of high-density IT devices including blade servers and high-draw network switches.

Key features

• ZeroU vertical design that preserves every rack unit for IT hardware, maximizing usable space.
• Twenty-one outlets compatible with C13 or C15 plugs and three larger outlets for C19 or C21 plugs, accommodating diverse equipment needs.
• Switched outlets provide individual power control, enabling power cycling, staggered start-up sequences, and outlet locking to prevent overloads.
• Remote management through a built-in network interface, with optional Wi-Fi connectivity via the APC AP9834 USB device for flexible monitoring in remote or cable-limited locations.
• Toolless mounting system that aligns with APC NetShelter enclosures, allowing fast and easy installation or replacement.
• L6-20 input plug designed for connection to standard 20 A, 208 V branch circuits common in modern data centers and edge environments.

Key specs

• Input voltage: 208 V
• Current rating: 20 A input, 16 A line-rated output
• Power capacity: 3300 VA
• Outlets: 21 C13/C15 and 3 C19/C21
• Mounting: Vertical ZeroU, tool-less installation on APC NetShelter enclosures
• Input plug type: L6-20
• Remote management: Network interface with optional Wi-Fi via APC AP9834

Connectivity and compatibility

This power distribution unit is designed to integrate seamlessly with APC NetShelter racks, mounting vertically to save space and connect easily to existing infrastructure. The combination of C13/C15 and C19/C21 outlets supports a wide range of IT equipment, from standard servers to high-power networking devices. The L6-20 input plug fits standard 20 A, 208 V circuits commonly found in enterprise data centers and edge locations.

Performance and reliability

With switched outlets, administrators gain granular control over power delivery, allowing for remote rebooting of individual devices and reducing the need for physical intervention. This capability helps maintain uptime by enabling quick responses to alarms and power issues. The unit’s 3300 VA capacity and 16 A line rating ensure it can handle dense server configurations and high-draw network appliances reliably.

Ideal uses and environments

This PDU is well suited to enterprise data centers, co-location cages, lab environments, and edge sites where space is limited but reliable, manageable power distribution is critical. Its vertical ZeroU design makes it a strong choice for racks that need every available unit for IT hardware, while its remote management features support efficient operations in both local and remote installations.