The Siemens 5SY7315-8 is a SENTRON-series 3-pole miniature circuit breaker with a D tripping characteristic, rated at 1.6 A at 40 °C. It breaks faults up to 15 kA per EN 60898 or 50 kA per IEC 60947-2 — the higher figure applies when the installation follows IEC 60947-2, which is typical for industrial control panels rather than residential distribution boards.
Thermal derating and environment
Rated 1.6 A at 35 °C, derated to 1.54 A at 40 °C, 1.5 A at 45 °C, 1.47 A at 50 °C, 1.44 A at 55 °C, and 1.4 A at 60 °C. Humidity tolerance: 95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C. Sealable, halogen-free, silicon-free.
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