What It Is and What It Does
The Siemens 3RT2016-2KA42 is a SIRIUS coupling contactor in frame size S00, designed for switching loads in industrial control panels. The 12 V DC coil and spring-type terminals (accepting solid or stranded 0.5...4 mm² wire) make it a clean fit for PLC-driven or relay-logic circuits where a low-voltage DC coil is needed. Main contacts are rated 20...12 A (the range likely reflects AC-1/AC-3 duty), and the contactor delivers 10 A at 24 V DC, 3 A at 400 V AC, and 1 hp at 230 V — so it handles small motors, resistive heaters, and solenoid loads common in packaging, conveyor, and HVAC sub-panels.
Mounting and Integration
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width and 73 mm depth fit standard enclosure backplates. Clearance distances: 10 mm upwards, forwards, and downwards; 6 mm at the sides — enough for most panel layouts without forced cooling. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so it adapts to tight enclosures or angled sub-panels. No built-in auxiliary switch — plan for an external aux block or a separate feedback relay if status monitoring is required.
Switching Performance and Lifecycle
Lifecycle stage is current production. Mechanical life is typical 30,000,000 cycles. Switching frequency limits: 1,000 cycles/hour at AC-1 (resistive), 750 at AC-2 and AC-3 (motor start/run), 250 at AC-4 (plugging/inching). At AC-3e (enhanced motor rating) it also hits 750 cycles/hour. These numbers govern duty cycle in high-speed applications like indexing conveyors or rapid-reversing hoists. Arcing time at DC is 7...20 ms, and the rated control supply voltage is 12 V DC. Operating temperature range -25 to +60 °C; storage -55 to +80 °C — suitable for unconditioned plant-floor cabinets.
Sourcing and RFQ
This is a current-production Siemens SIRIUS part. For a BOM line requiring a 12 V DC coupling contactor in size S00 with spring terminals, the 3RT2016-2KA42 is a direct fit. Sourced to order; submit an RFQ for lead time and pricing.