High vibration package enhances aluminum capacitors

These devices are suited for military and commercial flight-based power systems that require high-energy density, rugged capacitors for bulk storage. Prior to the introduction of these devices, relatively expensive wet tantalum capacitors were the only type suited for these environments.

The capacitors are packaged in flat, stainless steel cans, one-half inch in height, with a near-hermetic, precision-welded construction, tested up to 80,000 feet. Their flat form factor allows them to be fit into tight spots, easily cooled, and easily ganged for compact, high bulk storage. 

The HVMLS version is further enhanced with ruggedized internal terminations and compressed can edges that keep the internal winding secure when tested up to 50 g (g-force) vibration. The HRMLS version is burned-in up to 48 hours at rated voltage and 85°C, the established military standard for excellent reliability.

According to Cornell Dubilier, key features of the new devices include: Near-hermetic welded seal; Stainless-steel case; 100 years expected operating life; the ability to withstand more than 80,000 feet altitude; and Type HV up to 50 g.