What ships in the carton — and what it does
This is a Siemens SIRIUS reversing contactor assembly, order code 3RA2315-8XB30-1AP0. At 480 V the rated current is 4.8 A; at 600 V it is 6.1 A. Horsepower ratings span 1.5 hp at 200/208 V up to 5 hp at 575/600 V. Maximum switching frequency in AC-3 is 750 operations per hour — that governs how fast the reversing sequence can cycle without overheating the contactor coils or the main contacts.
Mounting and wiring — what fits in the panel
Dimensions: 68 mm high, 90 mm wide, 73 mm deep. The depth is the key constraint for shallow enclosures — measure the gland plate clearance before committing the panel layout. Main current circuit and magnet coil both terminate at screw-type terminals. That covers most control-circuit and motor-power wiring sizes in a standard panel.
Environmental limits and mechanical endurance
The assembly is rated for shock at 10.5 g / 5 ms and 6.6 g / 10 ms on both AC and DC axes — sufficient for most industrial machine vibration environments. Mechanical life is 10 million cycles typical for the contactor size S00. That is the contactor's own endurance; the reversing assembly's mechanical interlock shares the same duty cycle.