The Siemens 3VA2116-6KP46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current with an ETU850 electronic trip unit. Its interrupting capacity hits 242 kA at 240 V — that's the figure that governs fault clearing on a 240 V secondary bus, not the 160 A load rating. At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V, and 3.7 kA at 690 V. For a 4-pole line-protection breaker, that SCCR headroom means it can sit upstream of a large transformer or feed a high-fault-rated switchboard without needing a current-limiting fuse ahead of it.
Dimensions & Integration
Physical footprint: 181 mm high, 140 mm wide, 86 mm deep. That 86 mm depth (3.39 in) is the dimension to check against your existing panel wiring trough clearance — the breaker body is deeper than a typical miniature breaker, so verify it clears the backplane or DIN-rail mounting plate. The 140 mm width (5.51 in) for a 4-pole unit is standard for this frame size; it occupies four 35 mm DIN-rail modules. Front IP40 protection means it's fine for a clean indoor panel but not for washdown environments.
Trip Unit & Communication
The ETU850 is an electronic trip unit with communication capability — it can report trip events and load data over the integrated communication function, which is useful for a facility running a power monitoring system. No undervoltage release or shunt trip is built in (those are accessory add-ons). The trip indicator is not present on this variant, so you won't get a local mechanical flag; you'd rely on the communication output or a separate auxiliary contact for status. Ground-fault monitoring is not included — if you need GF protection, you'd step to a different suffix.