The Siemens 5SL6220-7CC is a 2-pole miniature circuit breaker from the SENTRON series, rated 20 A with a C tripping characteristic and a 6 kA breaking capacity at 400 V AC per EN 60898. It occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm.
The 2-pole design switches both phase and neutral simultaneously — required for single-phase circuits where the neutral is not bonded to ground, or for two-phase loads. Rated for 50/60 Hz, with a maximum operating voltage of 440 V AC in multi-phase operation. DC capability is limited to 72 V maximum, so this is an AC-primary device.
Panel integration and environment
The 36 mm width (2 MW) matches the SENTRON modular grid; adjacent units share the same 76 mm depth, so busbar and wiring alignment is consistent across the row. Vibration resistance to 50 m/s² at 25 to 150 Hz per IEC 60068-2-6, so it holds up in panels mounted on machinery or near transformers.