Power supply unit Dell 495W Redundant Power Supply model 9338D, 495W output

Dell 495W Redundant Power Supply (model 9338D) is a spare or replacement server power module that provides up to 495 watts of DC output for compatible Dell server platforms. Designed for redundant power configurations, this unit supports continuous operation by sharing load with a companion module and allowing hot-swap replacement during maintenance or failure recovery. The compact design and standard hot-plug connector make it suitable for rack-based servers where minimizing downtime and maintaining power resiliency are priorities.

Advantages

This redundant power supply delivers stable power output with an emphasis on availability and fault tolerance in enterprise environments. It supports hot-swap replacement so a failed module can be removed and replaced without shutting down the server, reducing service interruptions. The unit’s compatibility with redundant server configurations helps balance load and maintain operation if one module becomes unavailable. Built to the vendor’s specifications for server power modules, it integrates with existing server power trays and monitoring systems.

Suitable for

• Enterprise and data center servers requiring redundant power
• System maintenance and planned module replacement
• Fault recovery to restore power without full system downtime
• Environments where hot-swap capability is necessary

Key specifications

• Output power: 495 W
• Form factor: hot-plug server power module
• Designed for redundant power configurations
• Cooling: internal fan-assisted cooling (server-managed)
• Connector type: vendor-standard server power tray interface

How to use

Install the power module into the server’s designated power bay following the server manufacturer’s instructions and safety procedures. Ensure the server is configured for redundant power operation and that the companion module is present or functional. For hot-swap replacement, verify that the system supports hot-plug removal, then carefully eject the failed module and insert the replacement until it seats and latches. Monitor the server’s power status indicators and management interface to confirm the new module is recognized and operating correctly.

Usage recommendations

Use this 495W redundant power module as part of a matched pair in redundant configurations; avoid operating critical systems on a single power module to reduce risk. Keep spare modules on-site for rapid replacement, and follow the server vendor’s guidelines for firmware, monitoring, and service procedures to ensure reliable operation and proper load balancing between modules.