What it is and where it fits
The Siemens SIRIUS 3RT1016-1AP05-ZW96 is a size S00 power contactor, 45 mm wide, with screw-type terminals for the main current circuit. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, so it drops into any standard panel rail without adapter plates. The S00 frame is the smallest in the SIRIUS contactor family, sized for motor loads up to 5.5 kW at 690 V and 4.5 kW at 500 V. That puts it in the light-to-medium motor switching class — pumps, fans, small conveyors.
What the ratings mean for your panel
The 114 mm depth is the dimension from the DIN rail backplane to the front of the contactor — critical when you're calculating gland-plate clearance or door-swing interference. At 45 mm wide, three of these fit side-by-side in a 150 mm enclosure section with side-by-side mounting permitted. Wire termination accepts 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) — the screw terminals handle up to 4 mm² per clamp, so you can daisy-chain two motor leads or parallel control wires without a separate terminal block. Rated operating current at AC-12 (resistive load) is 10 A maximum. For motor reversing duty (AC-4 at 400 V), the contactor is rated 8.5 A — that's the figure that governs frequent plugging or jogging applications, not the higher resistive rating. The auxiliary contact block carries 10 A at 24 V, 6 A at 230 V, and 0.3 A at 220 V DC — the DC switching capability drops sharply with voltage, so inductive DC loads (brake coils, solenoid valves) need verification against the DC-13 curve. Operating temperature spans -25 to +60 °C, which covers most indoor panel environments. The degree of pollution 3 rating means it's suitable for industrial atmospheres with conductive dust or intermittent condensation — typical for non-climate-controlled factory floors.
Lifecycle and sourcing reality
The ZW96 suffix indicates a special variant (customer-specific code), not a standard off-the-shelf 3RT1016. Verify that the ZW96 modification matches your BOM requirement before committing the line — the base electrical ratings are identical to the standard 3RT1016-1AP05, but the special code may carry packaging, labeling, or testing differences.