The 3RH1344-1AF00-0KA0: The contact block is rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V — these are the thermal current ratings for the auxiliary contacts, so they handle the control loads (PLC inputs, relay coils, indicator lamps) at those voltage levels without derating. The 6 kV rated surge voltage resistance means the contactor withstands transients common in industrial mains, so you don't need external suppression for the contact gap itself. Mechanical life is typical 10 million operating cycles, and contact reliability is specified as one incorrect switching operation per 100 million operations at 17 V, 1 mA — this matters for low-energy signal switching (e.g., 24 VDC PLC inputs) where oxide films on silver contacts can cause intermittent failures; this contactor is designed to switch those dry circuits reliably.
Width is 45 mm, depth 111 mm, height 57.5 mm. Solid conductor cross-sections accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² — that's two conductors per clamp for the smaller sizes, useful for daisy-chaining control wiring without extra terminals.
Shock and vibration
Shock resistance is 10g / 5 ms and 5g / 10 ms — this is the rating for the contactor body and contacts to remain closed under mechanical shock. If your panel is on a vibrating conveyor or near a large press, this part holds its state through those events.