What it is and what it does
The Siemens 5SL5102-7RC is a SENTRON miniature circuit breaker — a 1-pole, C-curve unit rated for 2 A at 220 V DC with a 10 kA breaking capacity. It is designed for DC circuits in residential and infrastructure installations. The C-curve tripping characteristic handles inrush currents typical for lighting and small transformers on a DC bus. Rated for 220 V DC and a 10 kA interrupting capacity, this breaker can safely clear a short-circuit fault up to that level on a DC supply, which is a common requirement for telecom rectifiers, solar combiner boxes, or battery-backed control panels.
Physical fit and panel integration
Occupies 1 modular width unit (18 mm) on a DIN rail, with a depth of 76 mm and height of 90 mm. Mounting position is any; installation depth is 70 mm behind the panel surface. IP20 protection (with connected conductors) means it is suitable for dry indoor enclosures — standard for distribution boards and control cabinets. The terminals are touch-protected per the product feature. Sealable design allows the installer to lock the breaker in the ON or OFF position for lockout/tagout procedures.