Breaking capacity and motor protection — 53 kA at 400 V
The 3RA6400-2AB43: Rated 53 kA at 400 V AC, this compact starter handles high fault currents typical of industrial distribution — it can be applied downstream of a transformer or main breaker without worrying about SCCR gaps. The trip class is adjustable between CLASS 10 and CLASS 20, so you set the overload curve to match the motor's thermal withstand: CLASS 10 for submersible pumps or compressors that need fast trip, CLASS 20 for high-inertia loads like fans or centrifuges where starting current lasts longer. The 0.4 A at 400 V confirms the load current range.
IO-Link integration — COM2 at 38.4 kBaud
IO-Link protocol is built in, with a transfer rate of COM2 (38.4 kBaud). That's the medium speed tier — adequate for parameter upload, diagnostic readback, and status monitoring of the starter's three LEDs. For applications that need faster cycle times or streaming process data, COM2 is a constraint: expect ~2.6 ms cycle time per device, so plan the IO-Link master's port schedule accordingly. No AS-Interface — this is strictly IO-Link.
Mounting and panel fit — 45 mm wide, any position
The 3RA6400-2AB43 is 45 mm wide, 191 mm high, and 165 mm deep — a standard three-module-wide DIN rail footprint. Fastening is screw and snap-on mounting, recommended vertical on a horizontal standard mounting rail, but mounting position is any. That means you can lay it sideways in a shallow enclosure if needed, though vertical keeps the heat path clean. Solid wire capacity is 2x 0.25 to 1.5 mm² — typical for control wiring; the main circuit connection is plug-in without terminals, so the power base snaps onto the rail and the electronics module clips on top.
Environmental and mechanical — -20 to +60 °C, 6g shock
That covers most indoor industrial environments, including unheated warehouses. Shock resistance is 60 m/s² (6g) for 10 ms per 3 shocks in all axes; vibration resistance is 15 mm displacement at 4–5.8 Hz and 20 m/s² acceleration at 5.8–500 Hz for 10 cycles. This is robust enough for machine-mounted applications near conveyors or presses — not just panel-mounted in a quiet cabinet.