The advancement of dc-dc converter technology has been greatly aided by the adoption of renewable energy sources, uninterruptible power supplies, and energy storage devices. There is a requirement for isolated dc-dc converter systems that offer isolation and quick power transfer between different dc bus systems due to the growth of distributed generation and dc loads. Dual active bridge (DAB) is one of the most commonly used isolated dc-dc converters. However, its primary drawback is that it does not function when switches fail. This led to development of different configuration of DAB for fault tolerance. Several additional components are required for fault tolerant DAB which increases control complexity and losses. In this paper, a simple capacitor integrated circuit breaker (CICB) system is proposed to convert each active bridge of DAB into a fault tolerant system. The fault tolerant DAB system operates on single phase shift (SPS) control throughout its operation. Simulation and experimental tests are carried out to verify the theoretical analysis.