What this contactor is and what it does
The Siemens 3RT1016-1AP04-3MA0 is a SIRIUS power contactor in the S00 frame size, designed for switching three-phase motors and resistive loads in control panels. It carries a motor rating of 4.5 kW at 500 V and 5.5 kW at 690 V, making it suited for 400 V class drives where the line voltage runs higher than standard 400 V. The AC-2 rating at 400 V is 4 kW, which covers wound-rotor motor duty; the AC-4 rating at 400 V is 8.5 A, covering plugging and inching applications where the contactor makes and breaks stalled-rotor current.
Mounting and panel fit
Mounts via screw fixing or snap-on onto 35 mm DIN rail per EN 50022. The S00 footprint is 45 mm wide, 57.5 mm tall, and 111 mm deep, so it occupies one standard 45 mm module slot on the rail. Side-by-side mounting is permitted, meaning you can gang multiple units without spacing — useful when building a motor starter cluster in a compact enclosure. The IP20 rating on the front and terminals means it is protected against finger contact but not washdown; it belongs inside a panel, not on the machine frame.
Termination and wiring
Main circuit and auxiliary/control circuits both use screw-type terminals. The main contacts accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded conductors; AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12. The auxiliary contacts use the same wire ranges. This covers typical control wiring from 1.5 mm² for coil circuits up to 4 mm² for motor feeders. Pollution degree 3 rating confirms suitability for industrial environments with conductive dust or condensation.
Coil and control circuit ratings
The contactor is rated for 50/60 Hz operation. The coil operating range is 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz, giving a pickup window that accommodates typical line sag. Rated voltage is 230 V at both 50 Hz and 60 Hz. The auxiliary contact ratings at various voltages are: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V. These are the switching capacities for the built-in auxiliary contacts — useful for interlocking, status feedback, or PLC input signals.
Protection and coordination
For short-circuit protection, type 1 coordination requires a gL/gG fuse rated 35 A; type 2 coordination requires a 20 A gL/gG fuse. Type 2 coordination limits contactor damage to a weld risk after a fault, which is the standard for most motor starter applications where downstream downtime matters. The mechanical endurance is 30 million cycles, so the contactor outlasts the machine in typical cyclic duty.