The Siemens 3RT2023-2AG20-ZX95 is a SIRIUS power contactor in the Size S0 frame, 45 mm wide, 102 mm tall, 97 mm deep. The coil terminals are spring-type, which speeds wiring in panel builds and holds reliably under vibration. An auxiliary switch is included on the contactor, saving a separate aux block for basic feedback or interlocking.
Rated for AC-3 switching at up to 1 000 operating cycles per hour, this contactor handles frequent motor starts without overheating the contacts. For AC-4 duty (plugging, inching) the maximum rate drops to 300 cycles per hour, reflecting the heavier arc stress during reversing or jogging. The 1 hp rating at 230 V confirms it can drive a fractional-horsepower motor directly for small conveyor or pump auxiliaries. Wire range accepts 1... 10 mm² solid or stranded on the main circuit, and 2x (0.5... 2.5 mm²) for the auxiliary circuit, which covers most panel wiring sizes up to 6 AWG.
Mounting and environmental notes
That helps when retrofitting into existing enclosures with odd panel orientations.