What It Is and Where It Lands
The Siemens SIRIUS 3RT2336-1NE30-0JB0 is a S2 frame contactor with a 48-80 V AC/DC coil, terminated through screw-type connections. It's a current-production part (lifecycle status: current), so it's still rolling off the line, not something you're hunting down as NOS or surplus. It mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible — you can rotate it ±180° on a vertical surface, or tilt it forward/backward ±22.5°. That's handy when you're shoehorning it into a crowded panel and the rail isn't perfectly level.
What the Coil Rating Means for Your Circuit
The coil is rated for 48-80 V AC/DC, which means it'll pick up and hold across that whole range. On 50 Hz it draws 2 VA; same on 60 Hz. That's a modest load — your control transformer or 24 VDC power supply won't break a sweat driving it, even with a handful of contactors in parallel. Pickup time is 30-55 ms on both AC and DC, and the arcing time runs 10-20 ms. That's typical for a contactor this size — fast enough for most motor start/stop cycles, but if you're sequencing with a PLC scan, make sure your off-delay timers account for the dropout window.
Wiring and Termination — What Fits the Screws
The main contact terminals accept 2x (0.5-1.5 mm²) or 2x (0.75-2.5 mm²) solid or stranded wire. That covers the common motor leads for a contactor this size — 1.5 mm² for control circuits, 2.5 mm² for power feeds up to maybe a 5.5 kW motor, depending on duty. No need for ferrule adapters unless your shop standard calls for them. It also carries an auxiliary switch block (attachable: 2), so you can add feedback contacts without a separate terminal block if your PLC needs a sealed confirmation of the main contact state.
Physical Fit in the Panel
Dimensions are 114 mm high, 75 mm wide, 130 mm deep. That's a compact S2 footprint — it'll fit a standard 400 mm deep enclosure with room for wiring gutters. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Nothing unusual; just don't butt it against the next device without those gaps for heat dissipation and arc flash clearance. Operating temperature range is -40 to +70 °C, storage from -55 to +80 °C. That's wide enough for most indoor panel environments, even unheated warehouses in northern climates. If it's going in a sun-baked enclosure next to a furnace, keep an eye on the internal panel temp — the contactor itself can take it, but the coil life might shorten above 60 °C sustained.