E-Fuse Application Overview
Increasing high-voltage content in automotive and transportation end equipment requires an increasing need for protection. E-fuses, enabled by Silicon Carbide (SiC) technology, provide a faster, more reliable method for protecting power electronic applications than traditional fuses. E-fuses detect and interrupt fault currents in microseconds—much faster than traditional approaches. Fast response times limit peak fault current and prevent a fault event from becoming a hard failure.
E-Fuse Interactive Block Diagram
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Reference Designs for E-Fuse
High-Voltage Auxiliary E-Fuse Reference Design
Enhance your Hybrid Electric Vehicle (HEV) and Electric Vehicle (EV) systems with our advanced high-voltage auxiliary E-Fuse (electronic fuse) technology for superior performance and reliability. This cutting-edge solution utilizes our 700V and 1200V Silicon Carbide mSiC® products, offering a comprehensive and efficient design. The integrated Time-Current Characteristic (TCC) curve facilitates seamless migration in non-automotive applications, including DC solid-state circuit breakers (SSCB).
High-Voltage Hardware-Based E-Fuse Reference Design
This fully hardware-based e-fuse reference design is optimized for high-voltage bidirectional applications, eliminating the need for an onboard microcontroller. Designed for both AC and DC systems, it supports 400V DC and 800V DC configurations and features bidirectional current blocking using mSiC® MOSFETs. Advanced protection is built in, with configurable current trip profiles for rapid-fault response.
High-Voltage Bidirectional Auxiliary E-Fuse Reference Design
The High‑Voltage Bidirectional Auxiliary E‑Fuse reference design demonstrates a solid‑state solution for protecting auxiliary high‑voltage DC rails in automotive and industrial systems. The design provides bidirectional current interruption, enabling controlled isolation of faults regardless of current direction. It is intended as a functional replacement for conventional fuses, relays and contactors in auxiliary power paths where fast response, configurability and reset capability are required.