兴业证券：AIDC赋能固态断路器成长 内资企业有望逐步实现国产替代

Group 1 - The core viewpoint is that the rapid development of AI technology is driving IDC to accelerate its transition to AIDC, with expected capacity reaching 20GW by 2025 and 61GW by 2028, indicating rapid industry growth [1] - The demand for circuit breakers is increasing alongside the rapid development of AIDC, with solid-state circuit breakers expected to become essential under the 800V architecture, allowing domestic companies to gradually achieve localization and increase market share [1] - Circuit breakers are defined as switching devices that can connect, carry, and interrupt current under normal and abnormal conditions, categorized into high-voltage and low-voltage types, with high-voltage devices being those rated above 3kV [1] Group 2 - The circuit breaker market is anticipated to expand significantly due to the ongoing global digital transformation and the growing demand for data center construction, with enhanced technical requirements for circuit breakers as 10kV direct current systems transition to 750V [2] - Solid-state circuit breakers (SSCB) are based on power semiconductor devices and include various control switch components, enabling rapid current interruption [2] Group 3 - Solid-state circuit breakers are expected to become a necessity for the 800VDC architecture due to their ability to address issues such as large voltage fluctuations and slow protection times of traditional mechanical breakers, with a market potential of approximately 10 billion yuan by 2027 [3]