SIRIUS S0 power contactor — 3RT1023-3AT60
Rated for AC-3 duty at 4.5 kW at 500 V and 5.5 kW at 690 V, it handles typical three-phase induction motor loads in conveyor, pump, and fan applications. Front-side protection is IP20 (finger-safe), while the terminals themselves are IP00 — standard for screw-clamp contactors.
The 45 mm wide S0 footprint occupies a single DIN-rail position. Side-by-side mounting is permitted with zero clearance between units, saving rail space in dense panels. The 6 mm clearance to grounded metal on the side is the only mandatory air gap. Main circuit terminals accept screw-clamp connections: 2x (1–2.5 mm²) solid/stranded, 2x (2.5–6 mm²), or up to 2x 10 mm². AWG equivalents are 2x (16–12), 2x (14–10), or 1x 8. Auxiliary contact wiring uses 2x (0.25–2.5 mm²) solid.
For BOM freeze or second-source planning, the 3RT1023-3AT60 is a direct form-fit-function match for other S0-frame 3RT1023 variants with the same coil voltage. The screw-terminal main circuit and 3 NO contact configuration are the key fit parameters.
Type 2 coordination (contactor remains fully serviceable) requires a 25 A gL/gG fuse. These values guide the selection of branch circuit protection.
