Vertiv Geist Rack Transfer Switch PDU with Next-Generation IMD - 1U, 20A, 120V, 1.9kW, 10 x NEMA 5-20R, 2 x NEMA 5-20P (VA4N21A0)

Upgrade your data center power architecture with the Vertiv Geist Rack Transfer Switch PDU featuring the next-generation Intelligent Monitoring Device (IMD). Engineered for reliable, mission-critical server rooms and edge deployments, this 1U rack-mountable PDU combines a robust 20A, 120V power profile with a smart transfer capability that ensures continuous uptime even when_power sources fluctuate. The Geist PDU is designed to consolidate power distribution, protection, and real-time monitoring into a compact horizontal chassis, making it an ideal backbone for high-density racks, networking gear, and IT infrastructure that demand precise load management and rapid fault isolation. With a total capacity of 1.9kW and ten NEMA 5-20R receptacles, you gain flexible, safe, and organized power delivery to individual devices while preserving headroom for peak loads.

What sets this PDU apart is its next-generation IMD technology, which delivers advanced sensing, analytics, and remote management without complicating the physical setup. The IMD continuously collects critical data such as current, voltage, and temperature, then presents it through an intuitive management interface. This capability allows data center operators to proactively optimize energy use, avoid overload scenarios, and respond quickly to potential issues before they impact equipment performance. The combination of hardware resilience and smart management transforms how you monitor and control power in compact racks, enabling better service levels for critical workloads, whether you’re running servers, storage appliances, or network devices.

Designed for ease of deployment, the Vertiv Geist PDU supports horizontal mounting in 19-inch racks and features a slim 1U footprint that maximizes rack density. The dual NEMA 5-20P input configuration provides redundancy so you can connect to two independent power sources or to separate circuits for added reliability. The ten NEMA 5-20R outlets offer ample distribution points for IT equipment, while the rugged construction and robust electrical protection keep sensitive devices safeguarded in demanding environments. This PDU is purpose-built to align with modern data center standards, embracing scalable management, reliable power transfer switching, and a clean, organized power path from panel to device.

Beyond raw power, the Geist PDU emphasizes operational efficiency. Real-time load monitoring helps prevent overloading, while clear status indicators and alerting capabilities reduce mean time to repair. With innate compatibility to Virtually any IT gear that fits a 1U PDU footprint, this unit simplifies cabling, improves airflow, and minimizes the risk of accidental unplugging or miswiring. The result is a solution that not only powers equipment but also elevates reliability, visibility, and control across your IT environment.

• 1U, 20A, 120V power profile: A compact yet capable PDU designed to support up to 1.9kW of load, perfect for densely populated racks with high-performance servers and networking gear.
• Ten NEMA 5-20R receptacles: Ample outlets for distributing power to multiple devices, with standardized timing and protection features built into each outlet.
• Dual NEMA 5-20P input plugs: Redundant power inputs enabling seamless source switching or dedicated feeds for critical equipment, reducing single-point failures.
• Next-Generation IMD monitoring: Advanced sensing (current, voltage, temperature) and remote management capabilities to optimize uptime, energy usage, and fault diagnosis.
• Rack-optimized design with transfer switch: Integrated transfer switching ensures uninterrupted power to critical devices by quickly switching to a backup source if the primary fails, while maintaining a clean, organized cabling footprint.

Technical Details of Vertiv Geist Rack Transfer Switch PDU with Next-Generation IMD

• Model: VA4N21A0
• Type: 1U Rack Transfer Switch PDU
• Power rating: 120V, 20A, 1.9 kW maximum load
• Outlets: 10 x NEMA 5-20R receptacles
• Inputs: 2 x NEMA 5-20P plugs for redundant feeds
• Monitoring: Next-Generation Intelligent Monitoring Device (IMD) with real-time sensor data
• Mounting: Horizontal 19-inch rack-mountable (1U)
• Protection: Built-in electrical protection and load management features to safeguard equipment
• Management interface: Integrated monitoring data accessible for proactive maintenance and energy optimization

How to install Vertiv Geist Rack Transfer Switch PDU with Next-Generation IMD

• Prepare the rack and confirm a 19-inch mounting space to accommodate a 1U PDU. Ensure adequate clearance for ventilation and cable routing.
• Mount the PDU horizontally in the rack using the included mounting hardware. Align outlets with the desired device access area to simplify cabling.
• Connect the two NEMA 5-20P input plugs to two separate power sources or circuits as applicable to your redundancy strategy. Verify that each input circuit is within the 20A rating and properly protected.
• Attach IT equipment to the 10 NEMA 5-20R outlets. Group devices by criticality and power load to maintain headroom and stable operation during peak conditions.
• Power up and configure the IMD monitoring system. Access the Geist management interface to set alert thresholds, view real-time metrics, and establish notification preferences for temperature, current, and voltage events.
• Perform a functional test of the transfer switch by simulating a primary source outage and confirming seamless transfer to the secondary source without interrupting connected devices.
• Label circuits for easy identification and implement a routine power and load assessment plan to sustain efficiency and prevent overloads.
• Document all configurations and ensure firmware and software are kept up-to-date to maximize security and feature availability.

Frequently asked questions

• Q: What is the purpose of the Next-Generation IMD in the Vertiv Geist PDU? A: The IMD provides real-time monitoring of critical parameters (current, voltage, temperature) and enables remote management. This visibility helps optimize energy usage, detect anomalies early, and improve uptime through proactive maintenance.
• Q: How does the rack transfer switch enhance reliability? A: The built-in transfer switch can switch between multiple power sources, ensuring that a single source failure does not disrupt power to connected equipment. This is essential for maintaining service levels in mission-critical environments.
• Q: How many receptacles does the PDU provide and what plug configuration does it require? A: The unit features 10 NEMA 5-20R receptacles and 2 NEMA 5-20P input plugs, designed for flexible distribution and redundant power feeds.
• Q: What loads can this PDU safely support? A: With a 120V, 20A rating and a 1.9kW maximum load, it is suitable for mid-to-high-density IT gear while preserving headroom for peak periods.
• Q: Is this PDU easy to install in standard racks? A: Yes. Its 1U horizontal form factor is designed for typical 19-inch racks, and it ships with standard mounting hardware for straightforward installation.