450-AKKR Dell 1100W AC Power Supply.

Dell 450-AKKR 1100W AC Power Supply Unit

The Dell 450-AKKR 1100W AC Power Supply is engineered specifically for the Dell PowerEdge R750 rack server, providing reliable power delivery for enterprise-level computing. This hot-pluggable power supply unit ensures continuous operation and supports the high-performance requirements of the R750 platform, which is designed for data-intensive workloads, virtualization, and mixed-use applications.

Form Factor

This power supply unit features a compact form factor measuring 100mm x 35mm x 190mm (H x W x D) with a weight of approximately 1.2kg. The standardized dimensions ensure proper fit within the PowerEdge R750 power supply bay and maintain optimal airflow for cooling.

Connector Configuration

The 450-AKKR utilizes a proprietary Dell connector interface that seamlessly integrates with the PowerEdge R750 backplane. The unit features a C20 inlet connector for power input and delivers power through a secure, dedicated interface designed to prevent incorrect installation.

Key Specifications

Maximum Power Capacity

With a maximum continuous output of 1100 watts, this PSU delivers sufficient power for fully configured PowerEdge R750 systems. The unit maintains stable operation across all load conditions from 20% to 100% of rated capacity, with peak efficiency achieved at approximately 50-70% load.

Voltage and Current Ratings

Input voltage range: 100-240V AC auto-sensing, 47-63Hz frequency. Output voltages include +12V, +12Vsb, +5V, and +3.3V rails with the +12V rail capable of delivering up to 91.6A continuous current. The unit supports worldwide voltage standards without requiring manual configuration.

Efficiency and Environmental Compliance

80 PLUS Platinum

The Dell 450-AKKR achieves 80 PLUS Platinum efficiency certification, delivering up to 94% efficiency at 50% load. This high efficiency rating reduces energy consumption, minimizes heat generation, and lowers total cost of ownership through reduced power costs and cooling requirements.

Environmental Operating Conditions

Designed for data center environments, the power supply operates efficiently in temperatures ranging from 0°C to 55°C with a maximum altitude of 3050 meters. Relative humidity tolerance ranges from 20% to 80% non-condensing. The unit complies with RoHS directives and meets ENERGY STAR requirements for server power supplies.

Redundancy and Hot-Swap Capabilities

N+1 Redundancy

When installed in pairs within the PowerEdge R750, the 450-AKKR power supplies support N+1 redundancy configuration. This ensures continuous system operation even if one power supply unit fails or is removed for maintenance. The R750 chassis supports up to two hot-pluggable PSUs for maximum availability.

Load Sharing Technology

Dell's advanced load sharing technology automatically balances the power load between multiple power supplies, preventing single-unit overload and extending component lifespan. The system dynamically adjusts power distribution based on current demands and environmental conditions.

Hot-Pluggable Functionality

The hot-pluggable design allows for replacement or maintenance of the power supply unit without shutting down the server or interrupting critical operations. This feature is essential for 24/7 enterprise environments where maximum uptime is required.

Safe Removal and Insertion

Integrated safety mechanisms prevent arcing during insertion and removal. The power supply features a robust handle with integrated status LED and a secure latching mechanism that ensures proper connection and prevents accidental disconnection.

Intelligent Fan Control

The 450-AKKR incorporates a temperature-controlled cooling fan that automatically adjusts speed based on load and ambient temperature. This optimized cooling approach ensures adequate thermal management while minimizing noise and power consumption.

Airflow Design

Engineered for front-to-back airflow that aligns with the PowerEdge R750 chassis design, the power supply maintains proper thermal conditions for both the PSU and server components. The fan design provides sufficient static pressure to overcome system backpressure in densely configured racks.

International Safety Standards

The Dell 450-AKKR complies with major international safety standards including UL/CSA 60950-1, EN 60950-1, and IEC 60950-1. The unit also meets CB Scheme requirements with all national differences.

Electromagnetic Compatibility

Emissions Compliance

The power supply meets FCC Part 15 Class A, CE Mark, VCCI Class A, and C-Tick emissions requirements. Conducted and radiated emissions are controlled to prevent interference with other equipment in the data center environment.

Immunity Standards

Immunity to electromagnetic interference meets EN 55024 standards, ensuring reliable operation in electrically noisy environments. Electrostatic discharge (ESD) immunity exceeds 8kV air discharge and 4kV contact discharge per IEC 61000-4-2.

Power Efficiency 

Energy Saving Technologies

The power supply features active power factor correction (PFC) with a typical power factor rating of 0.99 at full load. This minimizes reactive power and reduces the harmonic current distortion, meeting EN 61000-3-2 requirements for harmonic current emissions.

Low Standby Power Consumption

In standby mode, the power supply consumes less than 1W of power, meeting the most stringent energy efficiency requirements for server power supplies. This contributes to reduced energy costs in environments with variable computing loads.

Integration with PowerEdge R750 Systems

System Power Management

When installed in a PowerEdge R750, the 450-AKKR power supply works in conjunction with Dell OpenManage Power Manager to implement sophisticated power management policies. This includes power capping, thermal management, and workload-optimized power profiles.

Dynamic Power Supply Engagement

The PowerEdge R750 with 450-AKKR power supplies can automatically enable or disable individual power supplies based on system load, optimizing efficiency during periods of reduced demand without compromising redundancy.