4FKDY Dell 1100 Watt DC 48v Server Power Supply.

Dell 4FKDY 1100 Watt DC 48v Server Power Supply Overview

The Dell 4FKDY is a high-performance server power supply unit engineered for reliable power distribution in enterprise environments. With a maximum output of 1100 watts, this 48V DC PSU ensures optimal efficiency for demanding server workloads.

Main Specifications of Dell 4FKDY

• Manufacturer: Dell
• Part Number: 4FKDY
• Product Category: Server Power Supply
• Power Output: 1100 Watts
• Voltage: 48V DC
• Form Factor: Hot-swappable module

Key Attributes of the Dell 4FKDY

• Stable and consistent power delivery for mission-critical workloads
• Energy-efficient design that reduces operational costs
• High-density architecture for optimized space utilization
• Hot-plug support for seamless replacement and maintenance

Compatibility Information

The Dell 4FKDY 1100W 48V DC server power supply is specifically designed to integrate seamlessly with select Dell PowerEdge models, ensuring dependable performance and scalability.

Supported Systems

• Dell PowerEdge R750
• Dell PowerEdge R7525

Optimized for PowerEdge Servers

This PSU is tailored for PowerEdge R750 and PowerEdge R7525, guaranteeing optimal compatibility, stable uptime, and smooth system performance in intensive data center workloads.

Dell 4FKDY 1100 Watt DC 48V Server Power Supply

The Dell 4FKDY 1100 Watt DC 48V server power supply is a high-density, enterprise-grade replacement and upgrade option designed specifically for PowerEdge R750 and R7525 systems. As data centers demand higher efficiency, greater reliability, and denser power delivery, this category of DC 48V server power supplies has emerged to meet those needs. The 4FKDY model offers 1100 watts of continuous output at 48 volts DC, engineered for modern rack servers that either run natively on DC inputs or require DC front-end stages for improved energy conversion. This product category targets IT managers, system integrators, and infrastructure buyers who prioritize redundancy, hot-swap capability, high power efficiency, and compatibility with Dell PowerEdge server families. When optimizing a server room for power efficiency and reduced thermal load, choosing a reliable 1100W DC 48V module like the Dell 4FKDY can be a strategic decision that improves uptime while lowering cooling and energy costs over the long term.

Compatibility and Form Factor: Designed for PowerEdge R750 and R7525

The physical and electrical compatibility of the Dell 4FKDY makes it a drop-in or supported replacement for PowerEdge R750 and R7525 models when those systems are configured for DC 48V inputs or paired with DC-to-DC conversion infrastructures. The module's form factor aligns with Dell’s power sled architecture for these chassis, ensuring proper fit, connector alignment, and secure retention in the power bay. Compatibility extends beyond mechanical fit to include system-level telemetry and firmware handshakes: this PSU is designed to report voltage, wattage, temperature, and fan status back to the iDRAC/BMC for health monitoring and alerting. For procurement and deployment teams, verifying firmware compatibility is an essential step; in most cases, Dell's published compatibility matrix confirms operation in standard PowerEdge R750 and R7525 server configurations. That said, administrators should check whether their particular server builds require a specific PSU revision or an accompanying power management module to fully leverage redundancy and failover behavior.

Key Technical Specifications and Electrical Characteristics

The Dell 4FKDY is specified at 1100 watts continuous output at a nominal 48V DC. Important electrical characteristics include transient response, hold-up time, efficiency curve across different load levels, and protection features such as over-voltage protection (OVP), over-current protection (OCP), short circuit protection, and thermal shutdown. This model typically provides greater than 90% efficiency at typical server loads, which directly reduces operating costs and heat generation inside the chassis. The PSU's input range and filtering are engineered to handle common DC bus tolerances and surges found in telecom-style DC power distributions or modern data center DC architectures. Additionally, the 4FKDY integrates intelligent PMBus or SMBus communication for real-time monitoring, enabling system-level orchestration of power budgeting, graceful shutdowns, and predictive maintenance alerts. These characteristics make the module appropriate for mission-critical workloads and mixed-density server deployments where power quality and predictable performance are paramount.

Reliability Features, Redundancy, and Hot-Swap Serviceability

Enterprise deployments require power supplies that support active redundancy and hot-swap replacement without disrupting server operation. The Dell 4FKDY supports N+1 and N+N redundancy configurations commonly used across server racks. Its hot-pluggable design allows on-the-fly replacement, minimizing service windows and preserving application availability. Internal mechanical interlocks and status LEDs provide quick visual indication of health and readiness, while software integration with server management stacks gives remote visibility into voltages, currents, and any historical fault logs. For data centers focusing on high availability, pairing multiple 1100W DC 48V units within the same server chassis or across a rack-level power distribution system reduces single points of failure. This architecture is especially useful in clusters running virtualized workloads, databases, or latency-sensitive services where even brief outages are unacceptable. The module’s thermal design and fan interface are tuned for sustained high-load operation while maintaining acoustic and thermal tolerances expected in enterprise environments.

Performance, Efficiency, and Thermal Benefits

High-efficiency power conversion has cascading benefits: lower input power draw, reduced PUE (Power Usage Effectiveness), and lower cooling requirements. The Dell 4FKDY’s efficiency profile helps minimize wasted energy usually lost as heat during voltage conversion. When installed in a PowerEdge R750 or R7525 configured for dense compute workloads, the 1100W DC 48V power supply reduces thermal stress on internal components and allows fans to operate at lower RPMs more often, which lowers noise and improves component longevity. From a performance perspective, stable and well-regulated power delivery supports consistent CPU and GPU boost behavior, preventing power-limited throttling under peak loads. This is particularly relevant for AI inference/training nodes, high-performance computing tasks, or I/O intensive workloads where voltage stability directly affects throughput and latency metrics. Operational teams monitoring both performance counters and power telemetry will find a measurable correlation between improved power efficiency and sustained performance during heavy, simultaneous workloads.