What the ratings mean for your panel
The Siemens SENTRON 3VA2110-5HN36-0HH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current (Iu) across a 40 °C to 50 °C ambient — it holds full rating up to 50 °C, then derates to 85 A at 70 °C. That 100 A frame makes it a fit for main feeder or large motor branch protection in a 400 V distribution panel. Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415/440 V, dropping to 79 kA at 500 V and 4.25 kA at 690 V. At typical 400 V industrial supply, that 121 kA SCCR means it can interrupt a bolted fault without upstream fuses needing to clear — you get full selectivity downstream. The 690 V figure (4.25 kA) is the weak point; verify fault current at that voltage before specifying. The ETU350 electronic trip unit handles the overcurrent protection — adjustable thermal-magnetic or electronic curve depending on the variant. This unit ships without ground-fault detection, phase-failure monitoring, or communication; it's a straight line-protection breaker with a shunt trip (STL) auxiliary release and 2 auxiliary switches plus 1 trip alarm contact (HQ configuration).
Lifecycle and sourcing reality
The 3VA2110-5HN36-0HH0 is the line-protection variant with shunt trip. If your panel was originally specified around a 3VA1110-5EE32-0JA0 (a different frame size and trip unit), the physical footprint and bus-bar centers differ — it will not drop in without re-termination and coordination review. Stick with this exact order code for a like-for-like swap.
Panel integration notes
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that fits a Siemens SENTRON distribution board or a generic DIN-rail adapter plate. The 86 mm depth leaves clearance for rear bus-bar connections in a 200 mm deep enclosure. Power loss is rated at 10 W maximum at full load — negligible for thermal budgeting in a ventilated panel, but worth noting if the breaker sits in a sealed enclosure with other high-current devices. Operating temperature range is -25 °C to +70 °C; storage range extends from -40 °C to +80 °C. The 70 °C operating limit at 85 A derating covers most machine-room environments.