The 3RT1056-2XB46-0LA2: This is a size S6 contactor frame — 172 mm tall, 120 mm wide, 170 mm deep. That depth is the dimension you need to check against your enclosure back-panel clearance, especially if you're mounting it with the arc chute facing a gland plate or busbar trunk. Mounting is by screw fixing through a 9 mm diameter hole. These are the minimum air gaps for arc flash and heat dissipation — don't crowd the arc chute side.
Coil and auxiliary circuit — 24 VDC with pick-up current profile
The coil is 24 VDC. The pick-up current at 24 V is 6 A, which drops to a holding current of 0.7 A initial value — that inrush matters for your DC supply sizing if you're switching multiple contactors simultaneously. If you're sequencing contactors in a motor-reversing or star-delta scheme, factor in that 80 ms minimum before the main contacts close. These are the dry-contact ratings for your PLC input or feedback circuit.
Switching frequency and duty-cycle limits
For DC loads: 400 cycles/hour at DC-1, 350 at DC-3 and DC-5. The AC-4 limit of 130 cycles/hour is the one that catches people out — if you're using this contactor for motor reversing or jogging, that's your ceiling. Exceeding it shortens contact life faster than the 10 million mechanical cycles would suggest.
Temperature range and storage conditions
Operating ambient: -40 to +70 °C. Storage: -55 to +80 °C. That -40 °C floor is worth noting for cold storage or outdoor panel applications — the coil still picks up at that temperature, though the inrush current will be higher due to lower coil resistance.