Part identity and what it does
The 3RT5064-6AR36: For the main circuit, it uses screw-type terminals, which is what you'd expect for a contactor this size — no spring-cage surprises when you're landing 120 or 150 mm² cable.
At 400 V and 60 °C ambient, this contactor handles 164 kW; at 690 V it's rated for 82 kW. The 164 kW at 400 V tells you it's sized for big motor loads, not just distribution switching. The built-in surge suppressor uses a varistor — that's your coil protection sorted, no separate module to order.
Mounting is by screw fixing — not a snap-on DIN clip — so plan for a backplate or mounting rail with drilled holes. Dimensions are 145 mm wide, 210 mm high, and 202 mm deep. That depth matters when you're fitting a gland plate or door-mounted HMI — make sure your enclosure depth clears 202 mm plus cable bending radius.