Siemens 5SY4532-7CV MCB, 15kA Icu 230/400V 1P+N C32

The Siemens 5SY4532-7CV is a miniature circuit breaker (MCB) rated for a short-circuit breaking capacity (Icu) of 15 kA at 230/400 V AC, in a 1-pole-plus-neutral (1P+N) configuration with a C32 tripping characteristic. The C-curve means it is designed for moderate inrush loads — typical for motor circuits, transformers, or lighting banks — where the instantaneous trip threshold is 5 to 10 times the rated current (32 A). The 15 kA Icu figure is the maximum fault current it can safely interrupt without welding contacts or rupturing the case; that rating holds across both 230 V and 400 V line-to-line, which covers most European and Asian distribution panels.