The 55 mm width means it takes up one standard 55 mm module slot on the rail — plan your panel layout accordingly. Screw-type terminals on the main current circuit accept 2x 1…25 mm² or 1x 1…35 mm² solid or stranded wire, so it'll handle common motor feeder sizes up to 35 mm² without adapter lugs.
Breaking Capacity at a Glance
The 3RV2331-4TC10's interrupting ratings vary by voltage, which matters when you're specifying across different line voltages or need to confirm coordination with downstream components. At 240 V it's rated for 100 kA, at 400 V for 30 kA, at 500 V for 6 kA, and at 690 V for 3 kA. For 400 V panels — the most common industrial voltage — 30 kA covers the vast majority of installations.
Environmental and Mounting Notes
Mounting position is any, which gives flexibility in tight enclosures. Clearance requirements: 50 mm upwards, 0 mm forwards, 50 mm downwards, 10 mm sideways — so you can pack modules fairly tight side-to-side but need breathing room top and bottom for heat dissipation and wiring access.