160 A MCCB with ETU550 — what the ratings mean for your panel
The Siemens 3VA2116-5JP32-0AA0 is a SENTRON molded case circuit breaker rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That 160 A holds steady at every temperature step in the spec, so you size the bus and downstream gear to a flat 160 A without thermal headroom padding. The ETU550 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Communication function is built in, so this breaker can report status and accept remote trip commands over the SENTRON communication bus — no external module required for basic connectivity. Breaking capacity is the headline number for fault coordination. At 240 V it interrupts 187 kA; at 415 V and 440 V it holds 121 kA; at 500 V it still manages 75.6 kA; at 690 V it drops to 3.7 kA. That 187 kA at 240 V is well above typical utility fault levels in North American 240/120 V split-phase or 240 V delta services — you have headroom for high-fault panels without cascading upstream fuses.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a 3-pole MCCB that fits standard SENTRON mounting patterns. The 86 mm depth (3.39 in) means it clears shallow backpanel enclosures where deeper breakers would hit the gland plate. Front IP40 protection handles typical panel environments; the breaker is designed for line protection (main or feeder duty) in distribution panels. Power loss is 25.5 W maximum at rated current — account for that in enclosure thermal calculations, especially in sealed stainless-steel panels.