Motor-protective breaker, 1.6 A, Class 10 — the line-down spare
The Siemens 3RV1021-1AA15-ZW95 is a SIRIUS motor-protective circuit breaker sized for a 0.55 kW motor at 400 V, with a continuous current rating of 1.6 A and Trip Class 10 — meaning it trips fast enough to protect standard induction motors during locked-rotor conditions without nuisance tripping on normal starts. Breaking capacity hits 100 kA at 240 V, 400 V, 500 V, and 690 V AC — that's full-range fault clearing without needing an upstream current-limiting fuse in most industrial panels, as long as the prospective short-circuit current stays under that threshold. No ground-fault sensing here — that's handled separately downstream if needed.
Mounting and wiring — DIN rail, any position, screw terminals
Main circuit screw terminals accept 2x (0.5…1.5 mm²) solid or 2x (1…2.5 mm²) stranded; auxiliary/control circuit terminals take 2x (0.75…2.5 mm²) solid. AWG equivalents for the main contacts are 2x (14…10). Zero clearance needed at the back or sides for cooling.
Environmental and lifecycle — current production, wide temperature range
Shock rated at 25g for 11 ms.