<p>For the proper operation of a power converter, all its components must be healthy and perform the assigned task correctly. To increase the reliability of dc-dc converters, their interleaved structure is used, and the mal-operation of one component causes the converter breakdown. This paper presents two new high reliable fault-tolerant interleaved dc-dc boost converters. In the presented converter, the voltage stress of the semiconductors is lower than the conventional interleaved dc-dc boost converter (CIBC). The operation of the presented converters is not affected by the short circuit (SC) faults of the semiconductors, and under SC faults has a durable power transferring to the load. For reconfiguration of these converters and fault management, there is no need for additional sensors, relays, and processors. The continuous Markov chain model is used to evaluate the reliability of the presented converters. The reliability analysis of the proposed converters has been performed based on changes in the switch's duty cycle and the power losses. Finally, an experimental prototype is provided to validate the mitigation of the adverse effects of SC faults on the operation of the converter.</p>