It's a 3-pole unit designed for isolation and switching, not for overload or short-circuit protection — there's no overcurrent release inside. The frame size is the 160 A platform, so it shares the same 70 mm depth, 76.2 mm width, and 130 mm height as the other 3VA1 breakers in this family.
Where it lands in a panel
This mounts in a standard distribution or motor-control center panel via the front terminals — busbar connection on the main circuit. The auxiliary contacts are wired separately for remote status; the shunt trip coil is rated for 110-127 V DC or AC 50/60 Hz, so verify your control voltage matches before wiring. No undervoltage release is fitted, so if you need UVR protection, this isn't the variant.
Rated continuous current Iu of 160 A is the maximum uninterrupted current this switch can carry without exceeding temperature limits. The rated insulation voltage Ui is 800 V, and the maximum operational voltage is 690 V AC 50/60 Hz or 500 V DC — so it's suitable for 400/480 V three-phase systems with headroom. The shunt trip operates at 110-127 V, so it's a direct fit for standard North American control voltages (120 V) or European 110 V control circuits. Power loss is listed at a maximum of 38 W, which matters for thermal management inside a dense panel. Mechanical endurance is 15,000 operations — that's the latching endurance, adequate for isolation duty but not for frequent switching under load.