Integrator's brief: what this contactor delivers
The Siemens SIRIUS 3RT1026-1BP40-1AA0 is a Size S0 power contactor rated for motor switching at 11 kW in AC-2 duty at 400 V — the standard category for slip-ring motor starting and reversing. For resistive loads (AC-12), it handles up to 10 A continuously. The 45 mm width and 85 mm height keep it within a standard panel layout — three units per 135 mm section. Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, or up to 2x 4 mm² max. AWG equivalents are 2x (16 to 12) solid and 1x 8 stranded. Strip and torque per Siemens standard — no special tooling needed beyond a Pozidriv #2.
Short-circuit coordination is defined for two assignment types. This matters when you're sizing the upstream protective device — the 35 A limit for Type 2 keeps the contactor reusable after a downstream short. Side-by-side mounting is permitted — no spacing required — which saves rail space in dense panels.
Coil and control: DC magnet data
The DC magnet coil draws 5.4 W during both closing and holding — a constant-power design that simplifies the control transformer sizing. These are the utilization category ratings for the auxiliary contacts, not the main poles.
Sourcing and lifecycle: current production, quoted to order
However, verify the coil voltage and auxiliary contact configuration against the original BOM — the 3RT1026-1BP40-1AA0 carries a DC magnet, while the 3RT1015-1BB42 may differ in coil supply.