What it is and where it lands
The Siemens 3RT2016-1AP02-ZW96 is a SIRIUS power contactor, Size S00, with a 24 VDC coil and screw-type terminals. It snaps onto 35 mm standard mounting rail per DIN EN 60715 and can be mounted in any orientation within ±180° rotation on a vertical surface, plus ±22.5° tilt forward or backward. That flexibility matters when you're packing a panel tight — you're not locked into one face.
Ratings that decide fit
The main contacts are rated 10 A at 24 V and 3 A at 400 V — those are the numbers that govern motor or resistive load switching in your circuit. The coil holds at 24 VDC nominal; the operating temperature range of -25 to +60 °C covers most indoor panel environments. Mechanical life is typical 30 million operations, so this isn't a part you'll swap often.
Mounting and wiring
Width is 45 mm, depth 73 mm, height 58 mm — that's a compact footprint for a Size S00 contactor. Wire range accepts solid or stranded 0.5 to 4 mm², with dual-wire entries for 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². Clearance spacing: 10 mm upwards, forwards, and downwards; 6 mm at the side. That keeps the panel layout predictable.