What it is and what it does
The Siemens 3RT1016-1AP62 is a SIRIUS power contactor in the S00 frame size, designed for switching motor loads in control panels. It carries a 4 kW rating at 400 V under AC-3 duty (cites:) — that's the standard induction motor switching category, so this contactor handles starting and stopping a motor up to that power without welding its main contacts. For reversing or plugging duty (AC-4), it's rated 8.5 A at 400 V (cites:), which is the current it can interrupt during inching or counter-current braking without excessive wear.
Panel fit and wiring
Mounts via screw and snap-on onto 35 mm DIN rail per EN 50022 (cites:). The S00 footprint is compact — 45 mm wide, 57.5 mm high, 72 mm deep (cites:,) — so it fits tightly on a crowded DIN rail without blocking adjacent devices. Side-by-side mounting is allowed with 6 mm spacing at the side (cites:,). Terminals are IP20 finger-safe (cites:,); the front is also IP20, meaning accidental contact during panel servicing is protected against. Screw-type terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) (cites:,). AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12 (cites:).
Coordination and protection
For Type 2 coordination (no damage to the contactor under short circuit), the required upstream fuse is gL/gG 20 A (cites:). For Type 1 coordination (contactor may need replacement after fault), use gL/gG 35 A (cites:). The contactor is rated for degree of pollution 3 (cites:), meaning it's suited for industrial environments with conductive dust or occasional condensation — typical for an unsealed panel. Operating temperature range is -25 to +60 °C (cites:).
Auxiliary and control circuit ratings
The contactor carries auxiliary contact ratings for the control circuit: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V (cites:,). The operating current at AC-12 (resistive load) is 10 A maximum (cites:). Coil operating range is 0.85 to 1.1 times rated voltage at 50 Hz, and 0.8 to 1.1 at 60 Hz (cites:,). Mechanical life is typical 30 million operations (cites:).