What this part does and where it fits
The Siemens 3RV1936-3AP0 is a motor remote operating mechanism from the SIRIUS family, designed specifically for S2-size circuit-breakers. It allows remote motorized operation of the breaker, meaning you can open or close the circuit from a control panel or PLC without needing to be at the switchboard — useful for automated lines or hazardous-area isolation where manual access is restricted. The control supply is 230 V AC, rated at both 50 Hz and 60 Hz, with an operating range from 195.5 V to 253 V. That covers nominal 230 V supplies with typical tolerance, so it holds in during brownout conditions down to about 85% of nominal. Maximum operating frequency is 251 cycles per hour — enough for frequent motor starts but not continuous jogging. Mounting is by screw fixing in any position, which is standard for panel integration on a backplate or sub-panel. The enclosure is rated for -20 to +70 °C operating ambient and -50 to +80 °C storage, with shock resistance of 25 g for 11 ms — tough enough for machine-mounted applications near vibration sources like conveyors or presses.
Lifecycle and sourcing reality
This part carries a 'current' lifecycle stage, but the manufacturer's own description flags it as a phased-out product. That means it is still available through distribution channels but is no longer being actively produced for new designs. If you have an existing BOM line or a panel that needs a drop-in replacement for an installed unit, this is the exact code — no rewiring or re-paneling needed. For new builds, check the official successor or an alternative S2 motor mechanism from the same SIRIUS range.
Panel fit and mechanical integration
The mechanism measures 211 mm deep, 148 mm wide, and 224 mm tall — a substantial footprint that needs clear access on the panel door or sub-panel. Clearance around the mechanism is zero in all directions (upwards, forwards, backwards, downwards, and at the side), so it can be mounted tight against other components or the enclosure wall without derating. That is unusual for a motorized operator and simplifies panel layout. Screw fixing is the only mounting method — no DIN rail clip. Plan for four mounting holes on a backplate. The actuating element is black, standard for SIRIUS operators.