Siemens 5SY6315-8 — SENTRON 3-Pole D-Curve MCB, 1.6 A
The Siemens 5SY6315-8 is a 3-pole miniature circuit breaker from the SENTRON 5SY6 series, rated at 1.6 A with a D tripping characteristic. It is designed for 400 V AC systems and carries a breaking capacity of 6 kA per EN 60898 and 30 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No. 235.
The 1.6 A rating and D curve make this MCB a fit for protecting a single small motor or a group of inductive loads where the starting surge exceeds 10× the full-load current. The 6 kA breaking capacity under EN 60898 covers standard residential and light commercial panel duty; the 30 kA rating under IEC 60947-2 means it can be used in industrial distribution where fault currents are higher — a key distinction for panel builders specifying for a 400 V industrial supply with a transformer upstream. The 3-pole configuration interrupts all three phases simultaneously, which is standard for three-phase motor circuits. The 72 V DC maximum rating (per IEC 60947-2) also allows limited DC branch protection, though the primary application is AC.
The 5SY6315-8 carries approvals per EN 60898, IEC 60947-2, and UL 1077 / CSA C22.2 No. 235, covering the major regulatory jurisdictions for industrial control panels. The touch-protection feature (fingertip-safe terminals) is standard for modern DIN-rail components.