SIRIUS S0 Contactor, 230 VAC Coil — Panel Fit and Sourcing
The Siemens SIRIUS 3RT2325-2AL20-1AA0 is a Size S0 contactor with a 230 VAC 50/60 Hz coil, designed for screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715. It carries an integrated auxiliary switch rated for 10 A at 230 VAC, making it a common choice for motor control and general switching in industrial control panels.
What the Ratings Mean for Fit
The 230 VAC coil (rated at 50 Hz and 60 Hz) pulls 0.25 A at 50 Hz and 0.28 A at 60 Hz — a modest draw that a standard control transformer can support, but worth checking if you are daisy-chaining multiple contactors on a single 24 VDC supply (this is AC, not DC). The auxiliary contact ratings span from 10 A at 24 VAC down to 0.1 A at 600 VAC, covering pilot duty and PLC input signals across common control voltages. The 10 A rating at 230 VAC is the headline figure for general-purpose signaling. Mechanical endurance: 10,000,000 operating cycles typical. Operating temperature range of -25 to +60 °C and storage range of -55 to +80 °C cover most indoor panel environments, including unheated warehouses.
Mounting and Wiring Constraints
S0 frame: 60 mm wide, 102 mm high, 97 mm deep. Clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at side. Main contact terminals accept solid wire from 2x 0.5 to 2.5 mm² and stranded from 1 to 10 mm². The coil connection uses spring-type terminals, which speed up wiring but require a ferrule on stranded wire for a gas-tight connection. Mounting position is standing on a horizontal surface — standard for DIN-rail panels. Up to two attachable auxiliary contact blocks can be added for expanded signaling needs.
Sourcing and Lifecycle Reality
If you are cross-referencing against a different SIRIUS variant (like a 3RT2027-2AV00), the S0 frame size and 230 VAC coil are the same, but the auxiliary contact configuration and terminal layout may differ — verify the wiring diagram before assuming a drop-in swap.