The Siemens 5SL3205-7 is a 2-pole miniature circuit breaker from the SENTRON 5SL3 series, rated 0.5 A with a C-curve tripping characteristic. It breaks fault currents up to 4.5 kA per EN 60898 at 400 V AC — the standard for final-distribution protection in residential and light commercial panels.
Occupies 2 width units (36 mm) on a DIN rail; installation depth is 70 mm with a total depth of 76 mm. Terminal accepts solid or stranded conductors from 0.75 to 25 mm². Tightening torque is 2.5 to 3 N·m. Sealable (yes) for tamper-proof applications. Touch protection is built in.