What this 3VA1 breaker carries
The Siemens 3VA1116-4EE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker from the 3VA1 line, rated at 160 A and delivering a 36 kA breaking capacity at 415 V (class S). It uses a TM220 ATFM trip unit — thermal-magnetic, with adjustable overload protection (Ir) from 112 A to 160 A and a fixed short-circuit pickup (Ii) at 10 × In. The N conductor is unprotected on this variant, and the unit ships with a nut keeper kit. The suffix indicates it was configured for a DC Power OEM in China, which may affect accessory compatibility or marking.
What the ratings mean for fit
The 36 kA Icu at 415 V means this breaker can safely interrupt fault currents up to that level without welding its contacts or rupturing the arc chamber — a critical spec for high-fault-capacity panels. The adjustable Ir band (112–160 A) lets you fine-tune the overload threshold to match cable or load ratings, while the fixed Ii at 10× In (1600 A) provides a defined magnetic trip point for short-circuit events. Because the N conductor is unprotected, this breaker is intended for 3-phase + N systems where the neutral is not expected to carry fault current — typical in balanced loads or where neutral protection is handled separately. The nut keeper kit simplifies panel assembly, reducing hardware loss during installation.