Integrator note — SIRIUS 3RT1015-1AB02-ZW97
The Siemens SIRIUS 3RT1015-1AB02-ZW97 is a size S00 power contactor with a 24 V 50/60 Hz coil, rated for motor switching up to 4 kW at 690 V AC-3 and 3 kW at 400 V AC-2. The screw-type terminals accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded, with a max of 2x (0.75...4 mm²); AWG equivalents are 2x (20...16) solid or 2x (18...14) stranded, plus 1x 12.
The AC-3 motor rating of 4 kW at 690 V and 3.5 kW at 500 V defines the largest standard induction motor this contactor can switch under full-load starting. The AC-4 rating of 6.5 A at 400 V governs inching/jogging duty — if your application cycles the motor on and off under load (e.g., a crane or press), the AC-4 current limit, not the AC-3 kW figure, is the binding constraint. The coil draws at 24 V 50/60 Hz with a holding factor of 0.8...1.1 at 50 Hz and 0.85...1.1 at 60 Hz — this means the coil holds reliably down to about 19 V at 50 Hz and 20 V at 60 Hz, which matters if your control transformer is undersized or you have long cable runs.
For Type 2 coordination, Siemens specifies a gL/gG fuse of 20 A. For Type 1 coordination, the fuse rating is 35 A.
Panel integration
Depth of 72 mm leaves clearance for wiring behind the panel door.