The Siemens SIRIUS 3RT2016-2KB42-ZW96 is a coupling contactor in the compact S00 frame size, designed for switching DC loads up to 24 V rated value where it handles 10 A, and up to 3 A at 400 V AC. It is a current-production part, still actively manufactured. The coil is 24 VDC with spring-type terminals, so no screwdriver is needed for the control wiring — just strip and push.
Depth is 73 mm, height 70 mm, so it fits most shallow enclosures.
This is a coupling contactor — it's built for frequent switching, not just holding closed. Electrical life depends on load: at AC-1 (resistive) it can cycle 1000 times per hour; at AC-3 (motor starting) it's rated 750 cycles/h; at AC-4 (plugging/inching) drop to 250 cycles/h. The DC switching time is 7 to 20 ms, arcing time 10 to 15 ms. The main contact range is 20 to 12, meaning it's sized for small motor or resistive loads typical of S00 contactors.
