SIRIUS 3RT2036-3XB40-0LA2 — 24 V DC Contactor, Size S2, Spring-Terminal
The Siemens 3RT2036-3XB40-0LA2 is a SIRIUS-branded contactor in size S2, with a 24 V DC coil and spring-type terminals. It carries a 52 A rated operational current at both 480 V and 600 V, and is rated for 10 hp at 230 V — so it handles motor loads up to that power class on a 230 V line. The DC coil draws a 3 A inrush peak, with a holding current of 0.7 A at 24 V nominal. Dropout time on DC is 30 to 55 ms, and arcing time runs 10 to 20 ms, which matters for contactor coordination in a motor starter. Mounting is via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving panel builders flexibility in tight enclosures. Clearance distances: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side.
Ratings and Switching Capacity
For DC switching, the contactor is rated at 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These DC ratings are per pole — useful for switching DC loads like solenoids or DC motor brakes. The AC-4 maximum switching frequency is 250 operations per hour, which sets a ceiling for heavy-duty jogging or inching applications. The main contacts are 3-pole (3 NO). An auxiliary switch is built in. The contactor carries a typical mechanical life of 10 million operations, per the datasheet. Operating temperature range is -40 to +70 °C; storage range is -55 to +80 °C.
Termination and Wiring
Spring-type terminals accept 2 x (0.5 to 2.5 mm²) solid or stranded wire. This is a tool-less termination — strip to the correct length and push in. No screw torque to verify, which saves time on repetitive panel wiring.