Product life and reliability are governed by both the inherent robustness of components and materials, and the margin between where the product is operated and the point where excessive stress causes failure. Automotive grade parts are typically rated for operation over wider temperature, and undergo more stringent testing, than commercial parts. Encapsulated DC links are much more immune to environmental contamination and moisture than open stacked designs. Polypropylene film capacitors have substantially more life than aluminum electrolytic capacitors, which often limit the useful life of power electronics systems. They also self-heal if damaged by transient over voltage, and can handle much higher continuous and abnormal ripple currents without failure. Overall, these high quality parts and construction methods mean more design margin in any application environment, which translates to higher reliability and longer life wherever the product is applied.