What the interrupting ratings mean for your panel
The Siemens SENTRON 3VA1116-5EF32-0AE0 is a 3-pole molded case circuit breaker rated for 160 A continuous current, with a TM240 thermal-magnetic overcurrent release. The interrupting capacity tells you where this breaker can sit in a distribution chain: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. At 415 V — common in industrial panel feeds — that 121 kA means it handles high-fault scenarios without cascading upstream. The 690 V figure (17 kA) is the limit for 600 V class installations; if your transformer secondary is above that, you need a different frame. Rated insulation voltage Ui is 800 V, so the breaker's internal clearance and creepage are designed for 690 V systems. The thermal derating curve is flat from 40 °C to 50 °C (160 A), then drops to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. If your panel ambient runs at 60 °C, plan for 150.4 A as the actual limit, not the nameplate 160 A.
Integration and auxiliary contact fit
The breaker ships with 4 auxiliary switches (HQ type) pre-installed — no add-on kit needed for status feedback to a PLC or annunciator panel. The auxiliary release design is listed as 'without auxiliary release', so there is no shunt trip or undervoltage release in this variant; if you need remote tripping, order a different option suffix. IP40 on the front means it is protected against tools and small wires entering the front face, but not against water ingress — mount in a dry enclosure or add a cover. Dimensions are 76.2 mm wide, 130 mm high, 70 mm deep. That 76.2 mm is a standard 3-pole MCCB footprint for a 160 A frame — it fits the same panel cutout as the 3VA1112-5EF32-0CA0 (lower ampacity sibling) without rewiring the bus bars, as long as the lugs accept the same conductor size. The 70 mm depth is shallow enough for a 200 mm deep enclosure with room for wiring behind.
Lifecycle and sourcing posture
Mechanical endurance is rated at 15 000 cycles (latching endurance), which is typical for a 160 A frame in distribution duty — not for frequent switching under load. If your application cycles the breaker daily, that is about 41 years of service; if it cycles multiple times per shift, consider a contactor for the load switching and keep the MCCB for fault protection only.