The Siemens SIRIUS 3RT1015-1AP01-ZX95 is a size S00 power contactor rated for switching resistive and light inductive loads up to 10 A at 24 V AC-12 duty, making it the go-to for control transformers, heater banks, and general-purpose on/off in a panel. AC-3 motor switching capability is 3 kW at 400 V and 4 kW at 690 V, meaning it handles a 4-pole induction motor up to that power on a 400 V three-phase line. For DC load switching, the contactor is rated 10 A at 24 V, 2 A at 60 V, and 0.3 A at 220 V — the inductive DC curve collapses fast as voltage rises, so watch the load type.
The -ZX95 suffix indicates a customer-specific variant; verify that the base ratings match your BOM before committing. The standard 3RT1015-1AP01 shares the same electrical core.
The 10 A AC-12 rating at 24 V means this contactor is sized for control-circuit loads, not heavy motor starts — AC-3 motor duty is limited to 3 kW at 400 V. For a 4 kW motor at 690 V, the next frame up (S0, e.g. 3RT1023) would be the correct call. The 30 million mechanical cycles typical endurance means this contactor will outlast the panel in most cyclic applications — it's not the limiting component in a conveyor or pump start circuit.
Screw terminals on the main current circuit accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or max 2x (0.75...4 mm²) solid/stranded — the 4 mm² max is for a single conductor only, so plan your ring terminals accordingly. For critical circuits, spec the 20 A fuse and keep the panel selective.