What it is and what it does
The Siemens 3RT1016-1AN11 is a SIRIUS power contactor in frame size S00, designed for switching three-phase motor loads and resistive loads in industrial control panels. It carries three normally-open main contacts and is rated for a 220 V 60 Hz coil supply.
Key ratings and what they mean for fit
For motor switching duty, the 3RT1016-1AN11 is rated at 4 kW at AC-2 at 400 V, meaning it handles wound-rotor motor starting and reversing loads up to that power. At AC-4 at 400 V, the rated operational current is 8.5 A, which covers plugging and inching duty for squirrel-cage motors within that current envelope. For general resistive and light inductive loads (AC-12), the contactor is rated for a maximum operational current of 10 A. The coil draws its rated supply at 220 V 60 Hz, with an operating range of 0.8 to 1.1 times the rated value — so the coil holds in from 176 V to 242 V at 60 Hz. Short-circuit coordination is specified: type 2 coordination requires a gL/gG fuse rated 20 A, while type 1 coordination requires 35 A. This determines the upstream fuse sizing for the motor branch circuit. The contactor is rated for a pollution degree of 3, which is the standard for industrial environments where conductive pollution or dry non-conductive pollution that becomes conductive due to condensation may occur. Mechanical service life is rated at 30,000,000 operating cycles typical, which is the figure for the contactor mechanism itself under no-load conditions — actual electrical life depends on the switched load and duty cycle.
Mounting and panel integration
The 3RT1016-1AN11 mounts via screw fixing or snap-on onto a 35 mm standard mounting rail per DIN EN 50022. Its width is 45 mm, height 57.5 mm, and depth 72 mm — a compact S00 footprint that fits standard DIN-rail enclosures. Side-by-side mounting is permitted, which means multiple contactors can be ganged on the rail without derating for heat dissipation — useful for compact motor starter assemblies. The enclosure offers IP20 protection on the front and at the terminals, meaning finger-safe but not protected against water ingress — suitable for dry indoor panel environments only.
Terminal details and wiring
Both main current circuit and auxiliary/control circuit terminals are screw-type. The main contacts accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or a maximum of 2x (0.75 to 4 mm²). AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12. Auxiliary contact terminals accept the same conductor cross-sections as the main contacts.
Operating environment
The contactor is rated for operation from -25 °C to +60 °C, covering most industrial enclosure ambient conditions without forced cooling.
Compliance and documentation
The product carries a RoHS compliance date of 01.07.2006, indicating it meets the EU RoHS directive for restricted substances. The IEC 81346-2 reference code is Q, which designates switching devices in the standard designation system.