What the ratings mean for fit
The AC-3 rating of 9 A and 4 kW at 400 V defines its motor-switching capability: it handles squirrel-cage motors during starting and running, where the inrush can be 5–7× the rated current. The 24 V DC coil is a common control voltage in industrial panels, drawing 3.3 W for both closing and holding — no AC ripple or rectifier needed. The Size S00 footprint (45 mm wide, 57.5 mm high, 72 mm deep) snaps onto a 35 mm DIN rail per EN 50022, with 6 mm side spacing required to grounded parts. The single NO auxiliary contact is built in; no add-on block is included.
Panel integration and wiring
Screw terminals on both main and auxiliary circuits accept 2× (0.5…1.5 mm²) solid or 2× (0.75…2.5 mm²) stranded, up to 2× (0.75…4 mm²) maximum. For AWG, that's 2× (20…16) solid, 2× (18…14) stranded, or 1× 12. The contactor mounts side-by-side without derating, provided the 6 mm air gap to grounded parts is maintained. IP20 on the front and terminals means it's protected against finger contact but not washdown — standard for enclosed panel mounting.
Mechanical and electrical endurance
Mechanical life is rated at 30 million operations for the contactor alone, dropping to 10 million with an auxiliary switch block added, and 5 million with an electronically optimized block. The auxiliary contacts are rated for 1 faulty switching per 100 million operations at 17 V, 1 mA — a dry-circuit reliability figure that matters for PLC-level signals. Short-circuit protection for the main circuit requires a gL/gG fuse: 20 A for Type 2 coordination, 35 A for Type 1.