Siemens 3TH42 44-0AN2 Contactor

Siemens 3TH4244-0AN2 Contactor Relay is a four‑pole device with eight contacts in total—four main contacts and four auxiliary contacts (4 NO + 4 NC)—designed for AC control and wired via screw terminals. The unit fits a compact 44 mm width (44E) and uses a 220 V AC control coil rated for 50/60 Hz, with damping accessories (RC networks, varistors, diodes) available to suppress switching surges. It is rated for AC operation with a rated operational current up to 16 A (AC‑12) at 230 V, and motor‑load ratings follow standard utilization categories: up to 2.4 kW at 230/220 V (AC‑2) and up to 4 kW at higher voltages (AC‑3). The four NO and four NC auxiliary contacts enable flexible control logic, interlocks, feedback, and sequencing in automation circuits, while the main contacts handle motor and load switching. This model belongs to Siemens’ SIRIUS 3TH4 family, a compact, reliable choice for panel builders needing expanded auxiliary contact capability without increasing the footprint.