Switching frequency and contact ratings
The 3RT2015-1AG61: For motor starting (AC-3 duty), the contactor is rated for 750 operating cycles per hour maximum. Resistive loads (AC-1) allow 1,000 ops/h, while the severe AC-4 category — plugging or inching — drops to 250 ops/h. The auxiliary switch contacts handle 10 A at 24 V, derating to 0.14 A at 440 V. These are the numbers that govern real panel duty cycles, not just the coil voltage.
That 6 mm side gap is the tightest constraint; plan for it in dense DIN-rail rows.
