Mechanisms of radiation induced failure in semiconductors and other active devices have been well-studied, and methods for overcoming or preventing these failures have been developed. Passive devices like inductors, resistors, and capacitors, on the other hand, are less relevant from a radiation perspective due to their lack of semiconductor materials. That said, their tolerance to radiation is no less important, and it must be considered. This is especially true when new types of passive components are invented that have performance characteristics well suited to high radiation environments. Tantalum polymer electrolytic capacitors and Tantalum MnO2 capacitors are one such example, and demonstrating their durability for radiation hardened applications is a critical step toward their widespread adoption.