What this 3VA1 frame breaker delivers
The Siemens 3VA1116-3EE32-0AA0-ZD00 is a 3-pole IEC molded-case circuit breaker on the 3VA1 frame, rated 160 A continuous and breaking 25 kA at 415 V (class N). That 25 kA Icu means it can safely interrupt a fault up to that level without welding contacts or venting arc — critical for panel SCCR compliance when the available fault current at the line side lands in that range. Overload protection is adjustable: Ir from 112 A to 160 A via the TM220 thermal-magnetic trip unit. Short-circuit pickup is fixed at 10× In. The ATFM designation flags it as a line-protection breaker, not a motor-circuit protector. The suffix ZD00 adds a nut keeper kit, specified for a DC Power OEM in China. That's a mounting accessory, not a functional change — the breaker itself is the standard 3VA1 frame, so it fits the same panel cutouts and bus connections as any 3VA1 160 A unit.
What the ratings mean for fit
The 25 kA Icu at 415 V is the ultimate breaking capacity — the breaker can interrupt one fault at that level and still be functional afterward (though you'd replace it after a fault that high). Service breaking capacity (Ics) is typically 50% or 75% of Icu on 3VA1 breakers; if your coordination study requires full Ics at 415 V, check the specific Ics rating for this variant. The adjustable Ir band (112–160 A) lets you dial in the continuous current to match the downstream cable or bus rating. Fixed Ii at 10× In means the magnetic trip won't shift — it clears bolted faults fast but may ride through moderate inrush.