The Siemens SENTRON 5SL4302-7RC is a 3-pole miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 2 A and breaking 10 kA at 415 V AC per EN 60898. At 2 A it's a low-current branch, often used for control circuits or lighting sub-circuits where the load is under 500 VA per phase.
At 18 mm wide (1 modular width unit), it occupies a single slot, leaving room for auxiliaries or other breakers in a crowded enclosure. The terminals accept supplementary devices (shunt trip, auxiliary contacts) if you need remote tripping or status feedback.
The 5SL4302-7RC is halogen-free and silicon-free throughout its construction, which matters for outgassing-sensitive environments like clean rooms or telecom shelters.