Motor protection breaker, S0 frame, 16 A
It combines a thermal overload relay and a magnetic short-circuit trip in one device, saving panel space over a separate contactor-and-relay pair. Rated operational current is 16 A, with an adjustable thermal overload release covering 10…16 A. The instantaneous short-circuit trip responds at 208 A, which coordinates with downstream contactors and starters to clear faults before they damage the load. For motors with longer acceleration times (high-inertia loads), a CLASS 20 or CLASS 30 breaker would be required.
Rated short-circuit breaking capacity is specified per IEC 60947-2 across the voltage range: 100 kA at 240 V AC, 55 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. The 55 kA at 400 V gives substantial SCCR headroom for most industrial distribution panels without requiring upstream current-limiting fuses.
Termination and mounting
Accepts 0.5…2.5 mm² solid or stranded, or 0.5…1.5 mm² finely stranded with ferrule. Side-by-side mounting with zero spacing is permitted at rated current, so no derating for ganging.
The product carries RoHS compliance with a substance prohibition date of 10/01/2009, indicating it meets the EU RoHS directive. The SIRIUS series is UL/CSA listed and CE marked for the European market.