APC Rack PDU 9000 Switched Zerou 20A - APDU9959NA3

APC by Schneider Electric APDU9959NA3 Switched 0U Vertical Rack PDU

Overview

The APDU9959NA3 is a 0U vertical switched rack PDU from APC by Schneider Electric, designed to deliver individually controlled power distribution across 24 outlets in space-constrained data center and IDF closet deployments. Mounted vertically in the rear of standard 2-post or 4-post racks, it occupies zero rack units — a meaningful distinction when every horizontal U is allocated to compute or networking gear. At 20A input over a NEMA L6-20P plug on a 200–208V circuit, this unit slots into the three-phase or stepped-down 208V infrastructure common in enterprise server rooms and colocation environments.

Switched control means each outlet can be independently toggled on or off — remotely, on a schedule, or in response to an event — without touching the rack. For rack PDU deployments where remote power cycling is a hard requirement (lights-out facilities, remote branch offices, managed hosting), that per-outlet switching capability is the core functional differentiator over metered-only or basic PDU models. Explore the full APC by Schneider Electric power management catalog for complementary UPS and monitoring solutions.

Key Features

• 0U Vertical Mounting: Installing vertically in the rack's rear vertical channel means no horizontal rack space consumed — critical in fully loaded 42U racks where losing even 1U to a PDU is not an option. The zero-U form factor preserves every slot for revenue-generating equipment.
• 24 Switched AC Outlets (C13/C15/C19/C21): The mixed outlet complement handles the full range of server and networking loads. C13 covers standard 1U servers and switches; C15 handles higher-temperature environments (common near hot-aisle containment); C19 and C21 serve high-draw devices like blade chassis and large UPS bypass loads. Having all four types on a single PDU eliminates the need for adapters.
• 20A / 200–208V Input (NEMA L6-20P): Sized for standard 208V branch circuits in North American enterprise environments. The L6-20P plug mates directly with the 20A locking receptacles found on most PDU-capable UPS outputs and PDU distribution strips — no field-fabricated wiring or adapters needed. At 3,300 VA load capacity, you have headroom to run 18–20 typical 1U servers on a single branch circuit without approaching the 80% continuous-load rule.
• Per-Outlet Switching: Remote power cycling of individual outlets is the primary reason to choose a switched PDU over a metered alternative. Hung servers, unresponsive network devices, and equipment that requires a hard reboot after firmware updates can all be cycled without dispatching a technician — measurable savings in facilities where a truck roll costs $150–$500 per visit.
• 200–208V Nominal I/O: Input and output voltages are matched at 200–208V, so there's no internal voltage conversion or regulation — the PDU distributes what the circuit delivers. Confirm your branch circuit is correctly spec'd before ordering; this unit is not compatible with standard 120V North American circuits.
• Wide Operating Temperature Range (-5°C to 60°C): Covers most real-world data center environments, including edge deployments in unconditioned telecom spaces or industrial control rooms where ambient temperatures can spike above typical IT norms. Storage down to -25°C is relevant if units are staged in cold warehouses before deployment.
• 5–95% Operating Humidity (Non-Condensing): Broad humidity tolerance supports deployment in environments without precision climate control — useful for branch office wiring closets where HVAC is building-grade rather than data-center-grade.
• CUL, FCC 15A, IEC 62368-1, PSE Certifications: Multi-jurisdiction safety compliance — CUL covers Canadian installations, PSE covers Japan, and IEC 62368-1 is the current harmonized AV/IT safety standard replacing the older IEC 60950-1. FCC Part 15A addresses conducted/radiated emissions. These certifications matter for multi-national deployments and for facilities management teams that require documented safety compliance before energizing new equipment.

Integration and Compatibility

The APDU9959NA3 is designed for enterprise rack power distribution environments running 200–208V infrastructure. The NEMA L6-20P plug mates with standard 20A locking 208V receptacles on compatible UPS systems and power distribution panels. The mixed outlet types (C13/C15/C19/C21) provide broad compatibility with 1U servers, blade chassis, network switches, and storage arrays without field modifications.

For facilities planning a full power chain, pairing this PDU with an appropriately sized APC UPS and a automatic transfer switch provides both runtime backup and remote management continuity. Confirm your UPS output receptacle type and amperage rating before commission — a 20A PDU on a 16A UPS output receptacle is a wiring compliance issue regardless of load.

Network engineers deploying in high-density switching environments should also reference available managed PoE switches alongside power planning to ensure holistic rack-level power budgeting.

Frequently Asked Questions

Q: What input plug does the APDU9959NA3 use, and what circuit does it require?

A: The APDU9959NA3 uses a NEMA L6-20P locking plug and requires a 200–208V, 20A dedicated branch circuit. It is not compatible with standard 120V North American circuits.

Q: How many outlets does the APDU9959NA3 have, and what types?

A: It provides 24 AC outlets in a mix of C13, C15, C19, and C21 coupler types — covering standard servers, higher-temperature loads, and high-draw blade or storage equipment without adapters.

Q: Does the APDU9959NA3 take up rack unit (U) space?

A: No. The APDU9959NA3 is a 0U unit that mounts vertically in the rear of the rack, consuming no horizontal rack unit space.

Q: What is the maximum load capacity of the APDU9959NA3?

A: The unit is rated at 3,300 VA load capacity on a 20A / 200–208V circuit. Per NEC continuous-load rules, size your connected load to no more than 80% of this figure (approximately 2,640 VA) for sustained operation.

Q: What safety certifications does the APDU9959NA3 carry?

A: The APDU9959NA3 holds CUL (Canada), FCC Part 15A (USA), IEC 62368-1 (international AV/IT safety), and PSE (Japan) certifications.

Q: What is the operating temperature range for the APDU9959NA3?

A: Operating range is -5°C to 60°C (23°F to 140°F), with storage rated from -25°C to 65°C. It tolerates 5–95% relative humidity (non-condensing) in both operating and storage conditions.