Vertiv Liebert TDU 4000VA/4000W 120VAC Step-Down Transformer

The Vertiv Liebert TDU - 4000VA/4000W 120VAC is a robust, high-capacity step-down transformer and voltage converter engineered to deliver reliable 120 VAC power from higher voltage sources. Designed for commercial, industrial, and IT environments, this unit safely converts 208 VAC or 240 VAC input into a stable 120 VAC output, helping protect sensitive equipment, preserve performance, and minimize downtime. Built with a focus on efficiency, durability, and ease of integration, the Liebert TDU is an essential power companion for servers, networking gear, audio-visual setups, test benches, and other critical loads that demand consistent voltage and clean power delivery. Whether you're equipping a data closet, a repair facility, or a multi-user workplace, this transformer delivers the reliability you need while maintaining a compact footprint that fits into cabinets, utility rooms, or under desks.

• High-capacity power with dependable performance: The Liebert TDU supports up to 4000 VA and 4000 W, making it suitable for demanding loads and equipment clusters that require steady, regulated power. Its generous rating absorbs startup surges and peak loads without compromising output quality, helping protect equipment from undervoltage or overvoltage events that can shorten component life.
• Flexible input to output conversion: Specifically designed to accept higher mains voltages commonly found in many regions, including 208 VAC or 240 VAC, and deliver a stable 120 VAC output. This makes it an ideal solution for powering U.S.-style devices in facilities with international or mixed-voltage electrical systems while maintaining proper grounding and voltage reference.
• Clean, reliable 120 VAC for sensitive loads: The transformer provides a stable 120 VAC output that supports sensitive electronics, servers, network gear, laboratory instruments, and lab equipment. By isolating devices from voltage irregularities present on the input side, it helps minimize risk from transients, brownouts, or occasional surges that can degrade performance over time.
• Rugged construction with practical installation options: Built to handle busy environments, the Liebert TDU combines a sturdy enclosure with efficient thermal management and space-conscious sizing. Its durable design suits rack or floor installations in data centers, workshops, or maintenance rooms where reliable power delivery is critical across demanding workloads.
• Comprehensive protection and ease of use: Integrated safeguards—such as overload protection, short-circuit protection, and thermal monitoring—help protect both the transformer and connected equipment. The unit is designed for straightforward wiring and integration into existing electrical layouts, reducing installation time and complexity for facility teams and service professionals.

Technical Details of Vertiv Liebert TDU 4000VA/4000W 120VAC

• Capacity: 4000 VA / 4000 W
• Input voltage: 208–240 VAC
• Output voltage: 120 VAC
• Frequency: 50/60 Hz (compatible with common regional mains standards)
• Phase: Single-phase
• Protection features: Overload protection, short-circuit protection, thermal monitoring
• Construction: Rugged steel enclosure designed for commercial environments
• Applications: Ideal for powering IT equipment, audiovisual setups, lab instruments, and other devices that require a stable 120 VAC supply from higher-voltage mains

How to install Vertiv Liebert TDU 4000VA/4000W 120VAC

• Prepare the installation area: Choose a cool, dry, and well-ventilated location with adequate clearance for airflow and heat dissipation. Ensure the surface is level and capable of supporting the unit’s weight.
• Power off the site’s main supply: Before wiring, disconnect power at the service panel and verify absence of voltage to prevent shock or damage during installation.
• Mount and secure the transformer: Position the Liebert TDU in the selected space (rack-mount, cabinet, or floor stand as applicable). Use mounting hardware recommended by Vertiv to secure the unit firmly and minimize vibration.
• Connect the input supply: Wire the 208–240 VAC input leads to the transformer's input terminals following local electrical codes. Ensure proper grounding and secure connections to avoid arcing or loose contacts.
• Attach the output feeds: Connect the 120 VAC load-side conductors to the transformer's output terminals. Route cables neatly to prevent interference and ensure that connected devices are within the unit’s rated capacity.
• Ground and verify: Confirm a solid equipment ground connection. Recheck all terminations for tightness and correct polarity. Restore power at the main panel and test with a small load before applying full load.
• Test operation: Power up the connected equipment and monitor voltage at the output to verify a stable 120 VAC under typical load conditions. Check for unusual heat buildup or noise, and ensure protective indicators are functioning.
• Maintenance considerations: Periodically inspect connections, enclosure integrity, and ventilation. If overheating or fault indicators appear, power down safely and consult a qualified electrician or Vertiv support for service.

Frequently asked questions

• What voltage does the Vertiv Liebert TDU convert? It accepts higher input voltages in the 208–240 VAC range and provides a stable 120 VAC output suitable for a wide range of equipment.
• What loads can it support? With a rating of 4000 VA / 4000 W, it is designed to power demanding devices, clusters of IT equipment, servers, networking gear, or other sensitive electronics that require a reliable 120 VAC supply.
• Is professional installation required? Electrical work should be performed by a qualified electrician to ensure proper wiring, grounding, and compliance with local electrical codes and safety standards.
• Does it protect against voltage surges and surges? The Liebert TDU includes protection features such as overload and short-circuit protection, along with thermal monitoring, to help guard connected equipment from abnormal voltage conditions.
• Is the unit UL-listed or certified? Vertiv products typically meet prevailing safety and performance standards; verify current certification details from official Vertiv documentation or product packaging in your region.