S0 frame, 3-pole, AC coil — what you're working with
The 3RT7026-1AF00: Rated insulation voltage 690 V, surge voltage resistance 6 kV. Main contacts rated for AC-3 switching up to 690 V maximum; the DC-13 rating at 220 V is 0.3 A, so don't expect heavy DC load handling from this AC-optimized coil variant.
Mounting and integration — panel fit
45 mm wide, 85.5 mm tall, 91 mm deep — the S0 footprint is standard across the SIRIUS contactor family. That gives you options when the panel layout is tight. Wire range: 2x (0.5…1.5 mm²) solid/stranded or 2x (0.75…2.5 mm²) finely stranded with ferrule. Auxiliary switch blocks can be added on the front — the product extension is supported. Coil draw: 0.82 W closing, 0.24 W holding at DC. Shock resistance: 12.5g / 5 ms or 7.8g / 10 ms sine pulse. Acceptable for PLC-level control signals (17 V, 5 mA) on the auxiliary contacts.
For type 1 coordination (no weld prevention, just no fire risk on fault), use gL/gG NH 3NA fuses rated 80 A. For type 2 coordination (limited contact welding), step down to 35 A fuses. Maximum mechanical switching rate: 800 cycles/hour at AC-3, 250 cycles/hour at AC-4. Ambient operating range -10…+55 °C; storage -25…+70 °C.