What it is and where it fits
The Siemens SIRIUS 3RT1016-1AP02-ZX95 is a size S00 power contactor, meaning it's the smallest frame in the SIRIUS line — 45 mm wide, 57.5 mm tall, 72 mm deep. That footprint matters when you're packing contactors into a crowded DIN rail enclosure; S00 gives you the switching capacity without eating up rail space. It mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 50022. The side-by-side mounting is permitted, so you can gang them up for multi-motor groups without extra spacing. Front face carries IP20 protection; terminals are also IP20, typical for inside a panel where no one's poking screwdrivers into live parts.
Key ratings and what they mean for your load
This contactor is rated for motor switching: 4.5 kW at 500 V and 5.5 kW at 690 V. The 690 V rating is useful on 600 V class systems common in North American industrial plants — it gives you headroom for a 5.5 kW motor without stepping up to a bigger frame. At 400 V AC-2 duty it handles 4 kW; AC-4 at 400 V is rated 8.5 A, which covers frequent jogging or reversing applications. Auxiliary contact ratings cover the common control voltages you'll see on the floor: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. That 24 V 10 A rating is the one you care about if you're running a 24 VDC control loop — it's not a signal-level contact, it'll handle small solenoid valves or pilot lights directly. The operating temperature range is -25 to +60 °C, which covers most indoor panel environments and even unheated warehouses down to freezing. Pollution degree 3 means it's rated for industrial atmospheres where conductive dust or humidity might be present — standard for a control panel in a factory.
Wiring and terminal details
Main circuit terminals are screw-type, accepting solid or stranded conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or max 2x (0.75...4 mm²). AWG equivalents are 2x (20...16), 2x (18...14), and 1x 12. That's enough for the motor leads on a 5.5 kW load at 690 V — typically 2.5 mm² or 14 AWG would be fine, and the terminals handle that without pigtails. For short-circuit protection, the manufacturer recommends gL/gG fuses: 20 A for Type 2 coordination (no damage to the contactor after a fault) and 35 A for Type 1 (contactor may need replacement after a fault, but the installation is cleared). That's the selectivity decision you need to make at the panel design stage.
Lifecycle and sourcing posture
Sourcing is straightforward — quoted to order against an RFQ. No surplus or broker channel needed for this one; it's a standard catalog item in the SIRIUS line.