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How To Choose the Right Power Distribution Unit for Your Data Center IT Enclosure?

April 24, 2024


Hello there! If you’ve ever wondered about the backbone of a data center’s electrical setup, let me introduce you to Power Distribution Units or PDUs. These aren’t just fancy power strips; they’re crucial for managing and distributing electricity to the servers and hardware that power our digital world. Choosing the right PDU isn’t just about keeping the lights on; it’s about ensuring efficiency, reliability, and scalability in data centers.

In this article, we’re diving deep into the world of PDUs to help you pick the perfect one for your needs. Whether setting up a new data center or upgrading an existing one, the right PDU can make all the difference. Let’s begin this journey to find a PDU that matches your specific requirements, ensuring your data center runs smoothly and efficiently.

IT enclosure with computer and monitor

Understanding Power Distribution Units (PDUs)

So, what exactly is a Power Distribution Unit (PDU)? In simple terms, a PDU is a device used in data centers to distribute electric power to various components, such as servers, networking devices, and other IT equipment. Think of it as a sophisticated version of your home power strip with many more features and responsibilities.

The role of a PDU in data center infrastructure is critical. It’s not just about providing power; it’s about managing it efficiently. PDUs are designed to ensure that all sensitive IT equipment gets a stable and reliable power supply so it can operate without interruption. 

They come in various forms and capabilities, from basic models that distribute electricity to more advanced ones that can monitor and control power usage, helping to optimize energy efficiency and prevent overloads.

In essence, PDUs are the unsung heroes in the background, ensuring your data center’s heart keeps beating without skipping a beat. Whether you’re managing a small server room or a large-scale enterprise data center, understanding the role and functions of PDUs is a critical step in ensuring a robust and efficient IT operation.

Power Distribution Unit for IT Enclosure in Data Center

Types of PDUs and Their Applications

In the realm of data centers, PDUs come in various forms, each suited to different needs and scenarios. Let’s break down the types and explore where each one fits best.

Basic PDUs

Basic PDUs are the simplest form of power distribution units. They function like a power strip, offering multiple outlets to power server racks without additional features like power monitoring or remote control capabilities.

Use Cases:

  • Small data centers or IT Enclosures where advanced features are not necessary.
  • Testing environments where temporary setups are standard and cost-efficiency is critical.

Basic PDUs are sufficient in scenarios with minimal load balancing or remote monitoring, such as in smaller setups or less critical applications where cost savings are a priority.

Metered PDUs

Metered PDUs step up the game by monitoring the amount of power being used by the connected devices. They typically feature local display panels that show power consumption data, which can be crucial for managing capacity.


  • Prevent Overloads: By showing real-time power data, they help avoid circuit overloads.
  • Capacity Planning: They offer valuable insights for future infrastructure expansion by monitoring ongoing power usage.

Metered PDUs are ideal for data centers that need to manage power capacity and ensure efficiency but do not require remote monitoring capabilities.

Monitored PDUs

Monitored PDUs offer all the features of metered PDUs, with the added capability of network connectivity. This allows for remote monitoring of power metrics via a web interface or network management system.


  • Real-time Alerts: Send notifications about critical power issues.
  • Data Analysis: Track and analyze power usage over time to optimize energy consumption.

Monitored PDUs are suitable for larger data centers where power consumption and performance need to be managed remotely, enhancing operational reliability and efficiency.

Data Center IT Enclosure Power Distribution Unit

Switched PDUs

Switched PDUs provide comprehensive control over power distribution, enabling administrators to turn individual outlets on or off remotely. This capability is crucial for rebooting servers, managing loads, and controlling power remotely.


  • Remote Management: Power cycle devices without being physically present, saving time and reducing operational costs.
  • Enhanced Security: Prevent unauthorized use of power outlets with controlled access.

Switched PDUs are perfect for dynamic data centers requiring high flexibility and remote access, including colocation facilities and critical operations centers.

Intelligent PDUs

At the top of the PDU hierarchy are intelligent PDUs, which combine the functionalities of metered, monitored, and switched PDUs with enhanced capabilities for integration with DCIM systems.

Integration with DCIM:

  • Comprehensive Management: Allow for detailed management of power, environment, and data center operations.
  • Predictive Analysis: Enable proactive management through analytics and real-time data, predicting potential system failures before they occur.

Intelligent PDUs are best for advanced data centers looking to fully optimize their operations through automation and sophisticated power management. They play a pivotal role in modern, intelligent data centers.

Each type of PDU serves a specific role in data center management, offering solutions tailored to different levels of need—from primary power distribution to advanced networked power management systems.  Choosing the right PDU involves understanding these capabilities and aligning them with the specific requirements of your data center operations.

A man diligently working on a server in a data center and ensuring smooth operations of the Power Di

Features to Look for in a PDU

When you’re in the market for a Power Distribution Unit (PDU) for your data center, several key features can significantly affect how effectively you manage and monitor power distribution. Let’s dive into the critical and advanced features that can help optimize your data center operations.

Critical Features

Remote Monitoring

Remote monitoring allows data center managers to oversee and analyze the power usage of connected equipment from a distance. This feature is vital for maintaining optimal performance and avoiding power-related issues without needing to be physically present at the data center.

  • Benefits: Immediate alerts to potential problems, detailed power usage data, and the ability to make informed decisions quickly.

Network Connectivity

Network connectivity in a PDU enables integration into your data center’s LAN. This connectivity allows for centralized power management across multiple PDUs and racks, making monitoring and adjusting power settings across the entire facility easier.

  • Benefits: Simplifies management tasks, enhances the responsiveness of power distribution systems and integrates with other network management tools to provide a holistic view of data center operations.

Environmental Monitoring

Some PDUs come equipped with environmental monitoring capabilities, including temperature, humidity, and airflow sensors. These sensors help ensure the operating environment stays within safe parameters, protecting hardware from environmental stress.

  • Benefits: Prevents equipment failure due to environmental factors, enhances energy efficiency by optimizing cooling based on actual needs, and alerts staff to ecological anomalies.

Advanced Features

IP Aggregation

IP aggregation is a feature that allows several PDUs to share a single network connection and IP address. This capability is handy in large data centers where devices can quickly consume available network ports.

  • Benefits: Reduces network infrastructure costs, simplifies network management, and conserves IP addresses, making it easier to scale operations without extensive modifications to existing network configurations.

Fault Tolerance

Fault tolerance in PDUs ensures that even in the event of a component or system failure, the PDU can continue to operate effectively or safely shut down. This is crucial for maintaining uptime and preventing data loss or damage to sensitive equipment.

  • Benefits: Increases overall data center reliability, reduces downtime, and ensures continuous power delivery during critical operations or failure conditions.

Two men inspecting servers in a data center IT enclosure with a power distribution unit

Key Considerations When Choosing a PDU

Selecting the suitable Power Distribution Unit (PDU) is critical for ensuring a data center’s efficient and reliable operation. Let’s explore the key considerations you must consider when choosing a PDU.

Assessing Power Needs

Evaluating Power Requirements:

To determine the right PDU for your data center, start by assessing the total power requirements of your IT equipment. This involves:

  • Total Load: Calculate the combined power consumption of all devices in the data center. This includes servers, storage units, networking gear, and other electrical devices.
  • Phase Balance: Ensure the power load is evenly distributed across all available phases to maximize efficiency and reduce the risk of overloading any single phase.
  • Growth Projections: Consider future expansions and expected increases in power demand. Select a PDU that can accommodate your current needs and the anticipated growth over the next few years.

Environmental Considerations

Your data center’s physical environment can significantly impact a PDU’s performance and suitability.

  • Temperature and Humidity: Evaluate the data center’s ambient temperature and humidity levels. High temperatures or humidity can affect the efficiency and lifespan of a PDU.
  • PDU Types for Environmental Conditions: Consider PDUs with high-temperature ratings for high-temperature areas. In humid environments, look for PDUs with features that protect against moisture and condensation.

Scalability and Flexibility

Scaling and adapting to changing needs is crucial in data center management.

  • Modular PDUs: These PDUs offer great flexibility and are ideal for environments where future expansion is anticipated. They allow for the addition or reconfiguration of modules to meet changing power distribution requirements without requiring complete system overhauls.
  • Benefits: Modular PDUs can reduce downtime and provide a cost-effective way to upgrade power distribution capabilities as your data center grows.

Rows of servers in a data center hallway with a Power Distribution Unit for Your Data Center IT Enclosure


Selecting the suitable Power Distribution Unit (PDU) for your data center is a decision that goes beyond mere functionality—it shapes the efficiency, reliability, and scalability of your entire operation. 

We’ve explored various aspects of PDUs, from understanding the different types available, such as basic, metered, monitored, switched, and intelligent PDUs, to the critical features that enhance their functionality, such as remote monitoring, environmental monitoring, and advanced network connectivity.

Are you looking to upgrade your data center’s power management system or need clarification on how PDU fits your needs? I need help navigating these decisions. Please contact our team so we can provide personalized advice based on your specific requirements. With the proper guidance, you can ensure that your data center is equipped to handle today’s demands and tomorrow’s growth.

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