Siemens 3NE9634-1 Semiconductor Fuse-Link

Siemens SITOR fuse-link 3NE9634-1C is a high‑voltage semiconductor protection device designed to interrupt fault current for power electronics and switchgear. It is rated In 500 A with a rated voltage Un of 2,500 V AC and 1,500 V DC, making it suitable for protecting diodes, thyristors, IGBTs and other power semiconductors in HV environments. The NH3‑style fuse-link uses slotted blade contacts for a robust, reliable connection and includes a front indicator for quick visual status checks, with an approximately 260 mm length in a size‑3 form factor designed to integrate with Siemens SITOR fuse systems and compatible switch disconnectors. Operational class aR indicates targeted interrupt performance for semiconductor protection, delivering controlled melting to isolate faults in high‑energy circuits. This 3NE9634‑1C feature set aligns with Siemens’ focus on protecting sensitive semiconductor devices in power conversion, DC link protection, and substation applications, where precise response and clear status signaling matter. Commonly deployed within Siemens SENTRON/SITOR families, the fuse-link provides a purpose‑built protection element for semiconductors in high‑voltage systems, combining a proven voltage/current rating, sturdy blade contacts, and a clear indication mechanism to support fast, safe maintenance and replacement. In short, 3NE9634‑1C offers dedicated semiconductor protection with reliable HV performance, designed for seamless integration into Siemens fuse systems and compatible switchgear assemblies.