Attom Rack | Model.U-003R11H
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The Attom U-003R11H Rack Mount UPS is a 3kVA online double-conversion power backup solution designed for servers, IT systems, and networking equipment. It delivers clean, stable, and uninterrupted power with advanced MCU-based control technology. Featuring a wide input voltage range, intelligent battery management, and full electrical protection, it ensures reliable performance even in unstable power conditions. Its compact rack-mount design allows easy integration into IT infrastructure, while RS232 and optional SNMP/Modbus support enable remote monitoring. This UPS is ideal for small to medium businesses requiring efficient and dependable power protection.
Description
The Attom Rack Mount UPS Model No. U-003R11H is a compact and reliable uninterruptible power supply designed to deliver stable, clean, and continuous power for critical IT infrastructure, server environments, and network systems. With a capacity of 3kVA, this UPS is engineered to ensure uninterrupted operation for sensitive electronic equipment such as servers, switches, storage devices, and communication systems, making it an essential solution for small to medium-sized IT setups.
Built with advanced online double-conversion technology, the U-003R11H provides continuous power conditioning by converting incoming AC power into DC and then back into a pure sine wave AC output. This process completely isolates connected equipment from all common electrical disturbances such as voltage fluctuations, spikes, surges, harmonics, and electrical noise. As a result, IT systems receive clean, stable, and high-quality power at all times, significantly reducing downtime risks and protecting hardware from damage.
The UPS features a single-phase input and single-phase output configuration, making it ideal for small server rooms, branch offices, and networking environments where stable power backup is required without complex three-phase systems. Its 3kVA capacity ensures reliable backup support for essential IT equipment, allowing smooth business continuity during power outages or unstable grid conditions.
Designed in a standard 19-inch rack mount form factor, the U-003R11H integrates seamlessly into modern IT infrastructure. Its compact and space-efficient design allows for easy installation in server racks, helping organizations optimize valuable rack space while maintaining organized and scalable systems. This makes it a practical choice for businesses focused on efficient infrastructure management.
At the core of the system is an intelligent MCU (microcontroller unit) control system that ensures precise monitoring and real-time management of all UPS operations. This advanced control technology continuously analyzes power conditions and dynamically adjusts system performance to maintain optimal efficiency, stability, and reliability. It also ensures rapid response during power disturbances, guaranteeing uninterrupted protection for connected devices.
The U-003R11H supports a wide input voltage range, allowing it to operate efficiently even in unstable power environments. This reduces unnecessary battery usage during minor fluctuations, extending battery life and lowering maintenance costs. It is designed to handle challenging grid conditions commonly found in commercial and industrial environments.
Intelligent battery management is integrated into the UPS to optimize charging cycles, prevent overcharging, and continuously monitor battery health. This ensures maximum backup performance during outages while significantly extending battery lifespan, making it a cost-effective long-term power solution.
The UPS includes comprehensive protection features such as overload protection, short circuit protection, over-voltage protection, under-voltage protection, and automatic bypass functionality. These safety mechanisms ensure both the UPS and connected equipment remain protected under all operating conditions.
For monitoring and control, the U-003R11H supports standard RS232 communication, with optional SNMP/Modbus integration for remote management. This allows IT administrators to monitor system performance, receive alerts, and manage the UPS remotely, improving operational efficiency and response time.
With high energy efficiency, the UPS minimizes power loss and heat generation, resulting in lower electricity consumption and improved sustainability. Its stable and quiet operation makes it suitable for indoor IT environments where reliability and noise control are important.
Overall, the Attom Rack Mount UPS Model No. U-003R11H is a dependable, efficient, and intelligent power backup solution designed for modern IT infrastructure. Its combination of advanced technology, compact design, and strong protection features makes it an excellent choice for ensuring uninterrupted power and safeguarding critical business operations.
| Specification | Details |
|---|---|
| Model | U-003R11H |
| Capacity | 3kVA |
| UPS Type | Online Double Conversion |
| Input Phase | Single Phase |
| Output Phase | Single Phase |
| Input Voltage | 100/110/115/120/127V |
| Input Voltage Range | 55–145 VAC (50% Load), 85–140 VAC (Full Load) |
| Frequency Range | 40–70Hz |
| Battery Voltage | 72/96VDC |
| Efficiency | Up to 90% |
| Control System | MCU Intelligent Control |
| Protection Features | Overload, Short Circuit, Over/Under Voltage, Bypass |
| Communication | RS232, Optional SNMP/Modbus |





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