The Siemens 5SU1324-6KX06 is a 2-pole residual current operated circuit breaker (RCBO) from the SENTRON series, combining overcurrent protection and 30 mA residual current detection in a single 3-module-width unit (54 mm wide per, 90 mm tall per, 77 mm deep per). The 30 mA residual sensitivity covers personnel protection (indirect contact) and fire prevention per IEC 60364. The 4 000 V surge voltage resistance and overvoltage category III confirm it is rated for fixed-installation mains supply, not downstream equipment-level protection.
Mounts on DIN rail in any orientation. The 70 mm installation depth plus 7 mm for the housing means it clears most 80 mm deep enclosures. IP20 rating applies only when the distribution board is installed and conductors are connected — this is a panel-internal device, not surface-mount. The 95% humidity limit is standard for enclosed electrical rooms.