APC Step-Down Transformer RM 2U 208V IN 120V OUT w/L5-20 Receptacles

Power infrastructure in today’s facilities demands equipment that can adapt to different voltages without compromising performance or safety. The APC RM 2U Step-Down Transformer is engineered to deliver reliable voltage conversion from high-voltage sources to low-voltage outputs with precision and ease. Designed for data centers, laboratories, and professional environments where 208V or 200V input must be transformed into 120V or 100V for sensitive equipment, this unit combines robust capacity with rack-friendly form factor to ensure your critical devices stay powered without interruption. Whether you’re expanding a server room, upgrading a network closet, or provisioning a telecom rack, this transformer is built to handle demanding loads while occupying minimal rack space. The RM 2U model embodies APC’s commitment to durability, reliability, and safety—providing you with a dependable solution for voltage conversion in environments where uptime matters as much as the equipment itself.

At the heart of this transformer is a straightforward, purpose-built design that prioritizes consistent performance. The unit accepts a 208V input (or 200V in some configurations) and outputs standard 120V or 100V, enabling you to power low-voltage equipment that otherwise would require a different infrastructure. The ability to support a load of up to 5000 VA means you can run multiple devices in parallel—servers, switches, storage arrays, and other critical hardware—without overloading the system. A key benefit for facilities managers is the per-phase current limit of 20 A, which helps ensure that each branch of your rack draws only as much power as it safely can handle. This balance between high-capacity output and careful current management is essential in busy data rooms where power planning, temperature control, and equipment life all hinge on stable supply and predictable performance.

The RM 2U’s rack-mountable design is another major advantage for professional deployments. Measuring a compact 2U in height, it easily fits into a standard 19-inch equipment rack, making it ideal for data centers, communications rooms, and lab setups where space optimization is critical. The front-facing L5-20 receptacles offer a secure, locking connection that helps resist accidental disconnections during routine maintenance or equipment movement. This combination of rack compatibility and locking receptacles reduces downtime risks and simplifies cable management, enabling technicians to organize power distribution cleanly and efficiently. For teams that operate in environments with dense equipment configurations, the RM 2U provides a reliable, scalable power solution that won’t disrupt existing layouts or require major reconfigurations.

Safety is a cornerstone of APC’s design ethos, and this step-down transformer reflects that commitment. The robust construction, tested electrical isolation, and disciplined voltage conversion work together to protect sensitive devices from spikes, surges, and fluctuations that can shorten equipment life or cause unexpected downtime. By delivering stable 120V or 100V output from a 208V source, the transformer helps ensure devices operate within their intended tolerances, preserving performance and prolonging component health. In addition, the unit’s reputable engineering and proven reliability translate to lower maintenance needs, fewer unexpected failures, and greater peace of mind for facilities teams responsible for mission-critical systems. When uptime and data integrity are non-negotiable, an APC power solution like this RM 2U transformer helps maintain a steady, dependable energy backbone for your hardware ecosystem.

Operational flexibility is another defining feature. The ability to handle a 208V input with a 120V/100V output makes this transformer suitable for a wide range of installations—from regional data centers serving diverse client needs to labs running specialized instruments that require stabilized voltages. The 2U footprint and the included L5-20 outlets support typical enterprise equipment footprints, while the transformer’s design accommodates future expansion. If you anticipate adding more devices or reconfiguring your rack layout, the RM 2U retains its value by offering scalable power distribution without requiring a complete electrical overhaul. This adaptability is especially valuable in environments that evolve rapidly, as it minimizes downtime during upgrades and reduces long-term capital expenditure while preserving system reliability and performance.

In short, the APC Step-Down Transformer RM 2U 208V IN 120V OUT w/L5-20 Receptacles combines high-capacity voltage conversion, compact rack-mount design, secure receptacles, and a focus on reliability to deliver a versatile, future-ready solution for powering low-voltage equipment in demanding environments. It’s crafted for professionals who demand consistent performance, efficient space utilization, and straightforward deployment—so you can keep your critical devices powered, protected, and ready to operate at peak efficiency.

• High-capacity voltage conversion for demanding loads — Converts 208V (or 200V) input to 120V or 100V output, enabling reliable operation of low-voltage equipment in diverse facilities. With a 5000 VA rating, you can support multiple devices in a single rack without sacrificing performance, making it an ideal choice for servers, storage, networking gear, and lab instruments. The 20 A per-phase limit ensures safe current distribution across rack-mounted equipment, helping prevent overloads while maintaining stable power delivery.
• Compact 2U rack-mount design for efficient space use — This transformer fits neatly into standard 19-inch racks, occupying just 2U of vertical space. Its slim profile makes it easy to integrate into existing setups without requiring additional real estate, freeing up valuable rack space for critical IT hardware. The efficient form factor supports dense rack configurations in data centers, telecom rooms, and research labs, reducing the footprint of power distribution infrastructure while maintaining easy access for service and maintenance.
• Secure L5-20 receptacles for dependable connections — Equipped with locking L5-20 outlets that provide a secure connection to downstream devices. These receptacles help minimize accidental unplugging during maintenance or reconfiguration and support reliable, continuous operation of powered equipment. The locking design is particularly beneficial in environments with vibration, mobility, or frequent cable movement, ensuring power stays steady when it’s needed most.
• Reliability you can trust for critical environments — Built by APC, a brand known for durable, mission-critical power solutions, this step-down transformer delivers steady voltage conversion with robust construction. The unit is designed to perform consistently under demanding conditions typical of data centers and professional labs, helping extend equipment life and reduce downtime. By delivering clean, stable output from a high-voltage source, it supports the longevity and performance of sensitive electronics and network infrastructure.
• Versatile applicability across data centers, labs, and telecom setups — The ability to convert from 208V/200V to 120V/100V makes it suitable for a wide range of devices and installations. Whether you’re powering servers, switches, PDU infrastructure, instrumentation, or telecommunications gear, this transformer provides a reliable, scalable solution that accommodates evolving power needs. Its rack-mount compatibility and sizeable VA rating make it a practical choice for facilities seeking a unified approach to voltage conversion and power management.

Technical Details of APC Step-Down Transformer RM 2U 208V IN 120V OUT w/L5-20 Receptacles

• Input voltage: 208V (and 200V configurations are supported in practice)
• Output voltage: 120V or 100V
• Load/capacity: 5000 VA
• Maximum total current draw per phase: 20 A
• Rack height: 2U
• Receptacles: L5-20 outlets

how to install APC Step-Down Transformer RM 2U 208V IN 120V OUT w/L5-20 Receptacles

• Prepare the installation space by selecting a standard 19-inch rack with adequate ventilation. Confirm that the rack hardware is rated for the weight and duty cycle of a 5000 VA transformer and that there is sufficient clearance for airflow around the unit.
• Mount the RM 2U transformer in the rack, aligning the chassis with the rack rails and securing it with the appropriate screws. Ensure front and rear panel clearances allow for cable management and service access.
• Connect the high-voltage input power to the transformer's input circuit using the appropriate power cord and connectors for your facility's electrical infrastructure. Follow all local electrical codes and, if needed, involve a licensed electrician to perform the connection.
• Connect your low-voltage equipment to the L5-20 receptacles on the transformer. Distribute the load across multiple outlets to avoid exceeding the per-phase 20 A limit and to maintain balanced power across the rack.
• Power on and verify output voltage with a calibrated multimeter or integrated rack monitoring tools. Check that loads are within the 120V/100V specifications and monitor for any irregularities such as voltage drop, unusual heat, or noise on the line. Label and document the connections for future maintenance and troubleshooting.

Frequently asked questions

• What does the APC RM 2U Step-Down Transformer do? It converts a higher voltage input (208V or 200V) into a lower voltage output (120V or 100V) to power low-voltage equipment safely and reliably, within a robust 2U rack-mount form factor.
• What is the power rating? The unit is rated for 5000 VA, providing substantial capacity to power multiple devices in a single rack configuration.
• What is the current limit per phase? It supports a maximum total current draw of 20 A per phase, helping to prevent overloading and maintain stable operation of connected equipment.
• Is this transformer rack-mountable? Yes. The RM 2U is designed to fit into a standard 19-inch equipment rack and occupies 2U of vertical space, making it ideal for data centers, labs, and telecom rooms.
• What kind of outlets does it have? It features locking L5-20 receptacles, which provide secure connections to downstream devices and reduce the risk of accidental unplugging.