What it is and what fits
Siemens SIRIUS 3RT2326-1BB40 is an S0-size contactor with a 24 V DC coil and an integrated auxiliary switch. It fastens to a 35 mm DIN rail (DIN EN 60715) via screw and snap-on, occupying 85x60x107 mm (HxWxD) in the panel – a standard footprint for this frame class.
Mounting and wiring – panel-fitting notes
Mounting position is flexible: ±180° rotation on vertical surfaces, plus ±22.5° tilt forward/backward. Clearance minimums: 10 mm upward/downward, 6 mm sideways – typical for a contactor that shares a DIN rail with breakers or relays. Main power terminals accept stranded wire up to 10 mm²; auxiliary and coil terminals accept solid 0.5–1.5 mm² or stranded 0.75–2.5 mm². All are screw-type terminals (Pozidriv).
Lifecycle and supply posture
This is a current-production item. It is quoted against a BOM line through standard Siemens distribution. If you are freezing a panel design, this part will be available for future batches.