The Siemens 5SY4513-8 is a SENTRON miniature circuit breaker (MCB) from the 5SY4 design series, rated 13 A with a D tripping characteristic. It is a 1P+N (2-pole) unit, switching both phase and neutral, and occupies 2 width units (36 mm) on a DIN rail.
Breaking capacity and standards coverage
This MCB carries a 10 kA rated breaking capacity per EN 60898 (the residential/commercial standard) and 20 kA per IEC 60947-2 (the industrial standard). For DC circuits, the breaking capacity is 15 kA per IEC 60947-2, and under UL 1077 / CSA C22.2 No. 235 it is rated 5 kA. The overvoltage category is III, suitable for fixed-installation distribution boards.
Mounts via quick assembly system (snap-on DIN rail) in any position. The overall dimensions are 36 mm wide, 90 mm high, 76 mm deep, with an installation depth of 70 mm. Terminal capacity accepts solid or stranded conductors from 0.75 to 35 mm² — enough for the load side of a 13 A circuit with room for paralleling. The ambient temperature range is -40 to +70 °C (storage -40 to +75 °C), with humidity limits of 95% at 55 °C, derating to 55% at 70 °C.