HPE 665240-B21 750W Common Slot Platinum Hot-Plug Power Supply – Reliable, High-Efficiency Power for Enterprise Servers

The HPE 665240-B21 750W Common Slot Platinum Hot-Plug Power Supply is a high-performance, energy-efficient power module designed for HPE ProLiant Gen8, Gen9, and select Gen10 servers. Built to meet the demands of modern enterprise environments, this PSU delivers superior power efficiency, intelligent management features, and long-term reliability — all essential for maintaining consistent uptime and reducing operational costs in data centers.

High Energy Efficiency

This power supply unit is 80 PLUS Platinum certified, ensuring up to 94% energy conversion efficiency under standard operating loads. That means less wasted energy, reduced heat generation, and lower cooling costs. The HPE 665240-B21 helps businesses optimize their energy usage, aligning with today’s green IT initiatives while keeping performance uncompromised. Its efficient design ensures that power is consistently available to critical components, maximizing the performance and stability of HPE servers.

Hot-Plug Functionality for Continuous Operation

The hot-plug capability of the 665240-B21 enables users to install or replace the power supply without shutting down the server, ensuring continuous operation and zero downtime. This feature is critical for mission-critical applications in data centers, cloud infrastructure, and enterprise environments that require constant availability. With hot-plug support, maintenance becomes seamless, quick, and disruption-free.

Compact and Modular Common Slot Design

The HPE Common Slot (CS) power supply architecture ensures compatibility across a wide range of HPE server and storage platforms. The 665240-B21 fits into a shared mechanical and electrical bay design, allowing administrators to easily swap or upgrade PSUs as needed. This modular approach simplifies inventory management, minimizes maintenance complexity, and enhances scalability — giving IT teams the flexibility to adapt power configurations as system requirements evolve.

Intelligent Power Management

The 665240-B21 supports HPE Power Discovery Services and integrates seamlessly with HPE iLO (Integrated Lights-Out) management tools. These technologies provide advanced monitoring, reporting, and control over power consumption across connected devices. Administrators can track real-time efficiency, identify potential energy waste, and optimize load distribution, resulting in smarter energy use and extended hardware longevity.

Advanced Protection and Reliability

Built for enterprise-grade reliability, the HPE 665240-B21 incorporates multiple safety and protection mechanisms. These include overvoltage, overcurrent, short-circuit, and thermal protection, ensuring both the PSU and server components remain protected against power irregularities. This robust design reduces the risk of downtime, hardware failure, and data loss — providing confidence in continuous server operation even under heavy workloads.

Scalable Power and Redundancy Options

Designed with flexibility in mind, this PSU can be configured for redundant (1+1 or N+1) or load-sharing power modes. Redundancy ensures that if one power supply fails, another immediately takes over, maintaining uninterrupted operation. This scalability is particularly valuable for organizations managing mission-critical applications, such as financial transactions, virtualized environments, or database operations, where any downtime can lead to costly disruptions.

Global Compatibility and Energy Standards

The HPE 665240-B21 supports a wide input voltage range (100–240V AC), making it suitable for global deployment without requiring additional adapters. Its low halogen design aligns with international environmental standards, reducing harmful materials while promoting sustainability. As a result, this PSU not only performs efficiently but also supports the environmental and compliance goals of modern enterprises.

Designed for HPE ProLiant Servers

The 665240-B21 is compatible with various HPE ProLiant servers and storage systems, including the DL380, DL360, DL160, ML350, and select Apollo systems. Its modular and standardized Common Slot interface ensures easy integration across different HPE platforms, allowing IT managers to consolidate power management processes across the data center.

Silent and Efficient Cooling

Equipped with intelligent fan control, the PSU automatically adjusts fan speeds according to load and temperature conditions. This minimizes noise levels during operation and optimizes cooling efficiency, contributing to longer component life and reduced thermal stress on internal hardware.

Key Features Overview

• Model: HPE 665240-B21

• Power Output: 750 Watts

• Form Factor: Common Slot Hot-Plug

• Efficiency Rating: 80 PLUS Platinum (up to 94%)

• Input Voltage: 100–240V AC

• Hot-Plug Support: Yes

• Redundancy Options: 1+1, N+1, load sharing

• Integration: Compatible with HPE iLO and Power Discovery Services

• Protection Features: Overvoltage, Overcurrent, Short-Circuit, and Thermal

• Environmental Compliance: Low Halogen Design

Benefits at a Glance

The HPE 665240-B21 offers a combination of efficiency, reliability, and scalability that makes it ideal for enterprise and data center applications. Its modular Common Slot design simplifies maintenance and reduces downtime. With Platinum-level energy efficiency, it helps reduce power consumption and cooling costs, leading to lower total cost of ownership. Intelligent monitoring features provide better insight into energy usage, enabling proactive power management and optimization.

Conclusion

The HPE 665240-B21 750W Common Slot Platinum Hot-Plug Power Supply exemplifies HPE’s commitment to delivering energy-efficient, flexible, and reliable server power solutions. Whether used in single or redundant configurations, it ensures stable power delivery, maximum uptime, and simplified infrastructure management.

Enterprises seeking to reduce operational costs, enhance energy efficiency, and maintain consistent system reliability will find this PSU an excellent investment. It’s more than a power supply — it’s a cornerstone of modern, intelligent, and sustainable data center infrastructure.