Its interrupting capacity reaches 187 kA at 240 V, tapering to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the voltage-dependent curve governs where it can be applied as the main or branch breaker.
What the interrupting ratings mean for panel fit
At 415 V and 440 V the 121 kA rating still covers most industrial switchboards; at 500 V the 75.6 kA handles large motor control centers. The sharp drop to 3.7 kA at 690 V means it is not suited for 690 V distribution with high fault capacity — that is a niche application, and the 3VA2 family has other frame sizes for it.
The 105 mm width fits a standard 3-pole MCCB cutout in most switchboard chassis; the 86 mm depth leaves clearance for rear-connected bus bars or cable lugs in a typical 400 mm deep enclosure.