Siemens 5SJ6210-7 SENTRON MCB — 2-Pole, C-Curve, 10 A
The Siemens 5SJ6210-7 is a 2-pole miniature circuit breaker from the SENTRON 5SJ6 series, rated 10 A with a C tripping characteristic. It breaks fault currents up to 6 kA per EN 60898 and IEC 60947-2 at 400 V AC, which means it handles the typical short-circuit levels found in commercial and light industrial distribution boards without needing an upstream current-limiting fuse. The 2-module-width (2 MW) footprint matches the SENTRON rail-mount system, so it aligns with busbars and neighboring devices without adapters. Rated for both AC and DC circuits — the DC rating tops out at 60 V, making it viable for 48 VDC control loops or battery-backed sub-distribution, though the 6 kA breaking capacity at DC should be verified against the available fault current.
Operating humidity is periodically up to +55 °C at 95% RH — no condensation issues in standard indoor switchgear.
