This case study details the Vicor SOSA-compliant 3U power supply designed for vehicle protection and countermeasures. The document outlines the customer's challenge of requiring 800W of power in a single 3U slot to support jamming, spoofing, and physical intercept methods. Specific hold-up requirements and budget sensitivity were key considerations for the customer. The Vicor solution includes a power supply that can be quickly modified by the engineering team to meet varying hold-up specifications. It is compliant with MIL-STD, which streamlines the qualification process. The power supply utilizes Vicor DCM™ DC-DC converter technology, allowing for high density in a compact form factor. The system can deliver up to 800W and features thermal efficiency through two-sided conduction-cooled modules. Additionally, it supports modular design modifications and can parallel multiple units for increased power output, making it adaptable for future changes.