Motor Protection Circuit Breaker, 16 A, Class 10
The Siemens 3RV6021-4AA15 is a SIRIUS motor protection circuit breaker in the Size S0 frame, rated for 16 A operational current with a Trip Class 10 thermal overload release. It protects three-phase motors up to that current level against overload and short-circuit, with a magnetic short-circuit trip and a thermal overload release built into a single 3-pole device. The 690 V AC-3 rating covers most European 400 V motor circuits with headroom for 690 V applications.
Mounting and Integration
Mounts via screw fixing or snap-on onto 35 mm DIN rail per DIN EN 60715, in any position. The 45 mm width (3 modules) fits standard enclosure cutouts for Size S0 breakers. Panel clearance: 50 mm above and below, 30 mm at the sides, zero forward or backward — tight enough for dense layouts. Screw-type terminals on both main and auxiliary circuits accept 2x (0.5...1.5 mm²) solid/stranded or 2x (0.75...2.5 mm²) with ferrules; AWG equivalents 2x (16...12) and 2x (14...8) for mains, 2x (20...16) and 2x (18...14) for auxiliaries. Terminal torque: 2...2.5 N·m.
Environmental and Compliance
Operating temperature range -20 to +60 °C, storage/transport -50 to +80 °C. Relative humidity 10 to 95 % during operation. Shock resistance 25 g / 11 ms per IEC 60068-2-27. Substance prohibition date 05/01/2012 — RoHS and REACH compliance documentation is standard for this brand and order code.