What the ratings mean for fit
The Siemens SENTRON 3VA1116-5ED32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 160 A. That 160 A holds flat from 40 °C through 50 °C ambient, then derates 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 — so in a warm enclosure the breaker still carries 144 A before the TM210 thermal-magnetic release starts its curve. The TM210 designation means the thermal element is fixed at 160 A (the Iu) and the magnetic short-circuit pickup is 10× Iu, or 1600 A, which is the standard setting for general distribution and motor-circuit protection where you need to ride through inrush without nuisance tripping. Breaking capacity is the headline: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. Those are the ultimate short-circuit breaking capacities (Icu) at each voltage — the breaker can safely interrupt a fault up to those levels without welding its contacts or rupturing the arc chamber. For a 415 V distribution panel with a transformer feeding a high-fault-current bus, 121 kA gives you headroom over a typical 50–65 kA available fault current, so you can use this breaker downstream without worrying about cascading failure. The 187 kA at 240 V is relevant for single-phase or line-to-neutral faults in 240/415 V systems. Rated insulation voltage Ui is 800 V, and maximum DC operational voltage Ue is 500 V — so the breaker is rated for DC circuits up to 500 V, though the DC breaking capacity curve is not listed here and should be checked against the device manual for the specific DC configuration. The auxiliary contact version includes 1 auxiliary switch plus 1 trip alarm switch (HQ type), which gives a separate signal for trip events versus normal open/close — useful for remote monitoring or PLC inputs that need to distinguish a fault from a manual off.
Panel integration and footprint
Dimensions are 76.2 mm wide, 130 mm high, and 70 mm deep. That 76.2 mm width is a standard 3-pole MCCB footprint on a DIN rail or mounting plate — it occupies three 25.4 mm module spaces. The 70 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters. IP40 on the front means the breaker face is protected against tools and wires over 1 mm, but the body is not sealed against water ingress — mount it inside a panel, not in a washdown zone.