Schneider Electric A155F2DSR0-200E Current-Limiting Power Fuse

A155F2DSR0-200E is a 15.5 kV, 200 A current-limiting transformer protection fuse (ferrule-mount, two-barrel 2B) designed for Schneider Electric Square D systems. This UL-listed device uses Amp-Trap CS-3 with Striker technology to rapidly interrupt fault currents while signaling when the fuse has opened, aiding diagnostics and system safety. Built for transformer protection in distribution networks, the ferrule-mount design supports high‑voltage protection in both indoor and outdoor switchgear configurations where fast fault clearance is critical to minimize equipment damage and downtime. The 200E rating specifies the fuse current capability, paired with a 15.5 kV class rating that defines the operating voltage range for protecting transformers and feeder circuits alike, with Type E listing aligned to the Amp-Trap CS-3 family’s transformer-protection lineage. Applications typically include protecting distribution transformers and feeder transformers in substations or protected feeder paths, where precise coordination between protection and reliability is essential. The part number A155F2DSR0-200E uniquely identifies this ferrule-mount, dual-barrel current-limiting fuse within Schneider Electric’s protection portfolio, signaling its intended use for high‑voltage transformer protection and rapid fault isolation.