What the AC-3 45 A rating and CLASS 10 trip mean for a motor circuit
The 3RA2150-4VA36-0NB3: The 45 A at 400 V AC-3 rating tells you this starter switches squirrel-cage motors during starting and plugging — the contactor set inside handles the inrush without welding its main poles, provided the motor full-load current stays at or below that 45 A threshold. The supplied contactor is a 3RT2036-1NB30 and the link module is 3RA2931-1AA00 — the factory-assembled pair is tested as a coordinated unit, so the SCCR and type-2 coordination data from the SIRIUS manual holds without field re-verification.
Mounting and integration into the panel
Fastening method is screw and snap-on mounting to two 35 mm DIN rails — the S2 frame spans the full 55 mm width and 274 mm height, so the panel cutout and backplate layout must clear the 150 mm depth plus the 50 mm upwards and 32 mm forwards clearance for cable bending radius and arc-fault venting. Mounting position is vertical or horizontal — horizontal orientation derates the thermal trip by roughly 5 % because the bimetal strip convection changes, though the SIRIUS manual gives the exact curve.
Lifecycle and sourcing — current production, quoted to order
Lifecycle stage is current — Siemens still builds this SIRIUS S2 direct starter, so it is not a legacy or phase-out line. The substance prohibitance date of 03/01/2017 aligns with the original RoHS compliance cutover; no REACH SVHC sunset on the bill of materials has been announced.