Its 4-pole configuration makes it suitable for three-phase plus neutral switching in industrial control panels where full disconnection of all live conductors is required.
What the 4-pole rating means for fit
The 4-pole rating governs the physical footprint and wiring scheme: it occupies a wider DIN-rail slot than a 3-pole equivalent and requires neutral conductor termination through the switch. In a panel layout, verify that the gland plate and wireway have clearance for the fourth pole's outgoing cable, especially when using larger conductor sizes for the neutral.