It carries 3 normally open and 1 normally closed auxiliary contacts (switching element identification 31 E), rated for AC control voltage. The screw-type terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or up to 4 mm², and it mounts via screw or snap-on onto a standard 35 mm DIN rail. Front protection is IP20, so it's suitable for enclosed panels where accidental finger contact is the concern. The 72 mm depth and 45 mm width mean it sits compactly on the rail, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward — useful for tight enclosures where orientation flexibility matters.
The contact reliability is specified for PLC control at 17 V, 5 mA — meaning these auxiliary contacts are rated to switch low-energy signals reliably, not just power loads. That's a common gotcha: a contactor relay that works fine at 230 V may not wet a PLC input at 24 V. This one is explicitly qualified for that duty. Rated operational currents: 6 A at 24 V, 230 V, and 400 V AC; 1 A at 690 V and 110 V; 0.3 A at 220 V. The 6 A rating at 400 V covers the typical control voltage for many European panels, while the 1 A at 690 V suits higher-voltage auxiliary circuits. Surge voltage resistance is 20 kV, giving solid margin for transient-heavy environments like motor starter bays. Coil apparent power: 27 VA pick-up, 5.4 VA holding at AC. The holding power is low enough that multiple relays on a control transformer won't overload it in steady state, but the pick-up surge needs to be factored into transformer sizing — especially if several coils energize simultaneously.
The S00 size is the smallest Siemens contactor frame, so it fits in tight rows alongside other S00 devices. The screw terminals are clearly marked for auxiliary and control circuits, and the 31 E contact configuration (3 NO + 1 NC) is a common pattern for signaling interlock or feedback to a PLC. Operating temperature range is -10 to +55 °C; storage from -25 to +70 °C. Shock resistance: 15g / 5 ms and 8g / 10 ms sine pulse at AC, plus 10g / 5 ms and 5g / 10 ms rectangular impulse — adequate for most industrial panel environments, including conveyor and material handling applications.