Ratings and what they mean for fit
The 3VA2116-6HN42-0AF0: The 80–160 A adjustable thermal-magnetic (electronic) range means this breaker can be dialed down to protect a 90 A feeder or up to a 160 A main, without swapping the frame. The ETU350 trip unit provides LSIG (long-time, short-time, instantaneous, ground-fault) protection curves — ground-fault monitoring is not fitted on this variant (the listing shows 'without'), so if you need GF protection you'd step to a -0A... suffix with the G function. The 242 kA at 240 V is the highest interrupting rating; at 415 V it's still 187 kA, which covers most industrial secondary distribution. At 690 V the 3.7 kA figure is a hard limit — do not assume the same fault-clearing capability at higher line voltages. Rated insulation voltage is 800 V, so the breaker itself is insulated for 690 V systems with margin.
Integration and panel fit
Dimensions: 181 mm height, 140 mm width, 86 mm depth. The 140 mm width is the standard 4-pole MCCB footprint — it occupies four 35 mm DIN-rail modules (roughly 140 mm total). IP40 on the front means it's protected against solid objects >1 mm but not against water ingress; mount inside a panel with a door, not in a washdown zone. The auxiliary switch configuration is 1 auxiliary + 1 trip alarm switch (HQ type), so you get a separate signal for breaker tripped vs. breaker open by handle. The 25.5 W maximum power loss at rated current matters for thermal management inside a sealed enclosure — if you're packing multiple breakers, account for that dissipation.